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成都理工大學學報（自然科學版）

成都理工大學學報（自然科學版）

北大核心

CSCD

Journal of Chengdu University of Technology(Science & Technology Edition)
本刊創辦于1960年,原名《成都地質學院學報》(1960~1993年, ISSN 0256-2197, CN 51-1153)、《成都理工學院學報》(1994~2002年, ISSN 1005-9539, CN 51-1460/P)?，F今為雙月刊，國內外公開發行。本刊已進入國內三種自然科學類核心期刊，即：（1）《中文核心期刊要目總覽》第一版(1992)、第三版(2000)和第四版(2004)的核心期刊（北京大學圖書館、北京高校圖書館期刊工作研究會）、（2）"中國科學引文數據庫(CSCD) "核心庫源期刊（中國科學院文獻情報中心）、（3）"中國科技論文統計源期刊（中國科技核心期刊）"（中國科技信息研究所）。此外，本刊還是"四川省自然科學學術類質量一級期刊"；先后11次在國家部委和四川省組織的科技期刊評比中獲獎，其中獲一等獎4次，二等獎6次，三等獎1次；1999年在教育部組織的"全國優秀高等學校自然科學學報及教育部優秀科技期刊評比"中獲得一等獎，這項獎勵等同于教育部科技進步一等獎。收錄本刊全部或部分論文的科技文摘期刊和數據庫主要有:(1)中國科學引文數據庫(CSCD);(2)中國學術期刊綜合評價數據庫;(3)中文科技期刊數據庫；(4)中國地質文摘；(5)中國石油文摘；(6)古生物學文摘；(7)中國無機分析化學文摘；(8) EI； (9)РЖ；(10)Chemical Abstracts；(11)Petroleum Abstracts；(12) Bibliography and Index of Geology；等等。主要欄目有：地質與礦產，油氣地質與勘探，水文與工程地質，核科學與工程，環境科學與工程，材料科學與工程，計算機科學與技術，地球探測與信息技術，數學與應用數學，化學與應用化學等。
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  • 發文量：3150
  • 被引量：1643
  • H指數：3
  • 開始收錄時間：1964(1)
  • CNKI綜合因子：0.764
  • 維普期刊影響因子： 0.96
  • 萬方期刊影響因子：0.8
  • 創刊時間：1960
  • 國內刊號/CN：51-1634/N
    國際刊號/ISSN：1671-9727
  • 發行周期：雙月刊
    郵發代號：62-24
  • 主管單位：四川省教育廳
    主辦單位：成都理工大學
成都理工大學學報（自然科學版）-聯系信息
  • 主編：劉清友
  • 電話：028-84078973
  • 郵箱：[email protected]
  • 地址：成都市成華區二仙橋東三路1號
  • 郵編：610059
成都理工大學學報（自然科學版）-獲獎情況
  • ? 先后15次在國家部委和四川省組織的科技期刊評比中獲獎，其中在教育部(包括原國家教委) 組織的科技期刊評比中獲一等獎3次(1989年, 1999年，2004年)、二等獎2次(1995年, 2008年)、優秀科技期刊獎1次(2006年) 、精品科技期刊獎1次(2008年)。根據教育部“教技[1999]1號”文件，本刊1999年7月在教育部組織的“全國優秀高等學校自然科學學報及教育部優秀科技期刊評比”中獲得的一等獎，等同于教育部科技進步一等獎。
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成都理工大學學報（自然科學版） >2023年第2期

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  • 摘要：Shale reservoir is characterized by low porosity and low permeability.The existence and development of fractures in shale are key factors for the formation of quality reservoir.It is very important to detect and study fracture development zones in shale in order to locate the gas and oil pools.Discrete frequency coherence cubes can be used to fulfill the purpose.Firstly,the original seismic data are processed by spectral decomposition,followed by the calculation of coherence cubes of single-band seismic data.Then,single-band coherence cubes of selected dominant bands are reconstructed by using principal component analysis.Finally,the reconstructed discrete frequency coherence cube can be used to predict the development of fracture zones.It shows that coherence cubes at different frequency bands reflect features of fractures of different scales,and the reconstructed discrete frequency coherence cube interpret the integral features of fractures of different scales in an interest area.Discrete frequency coherence technique plays a role in the fulfillment of accurate description of fracture development zones in shale.%頁巖儲層具有低孔低滲的特點,裂縫及其發育程度是決定頁巖氣藏品質的重要因素.采用分頻相干技術對頁巖儲層進行裂縫檢測:對原始的地震數據體進行分頻處理,對分頻后的單頻地震數據體進行相干性計算,得到單頻相干數據體,選取優勢頻帶采用主成分分析(PCA)對單頻相干數據進行重構,得到分頻重構相干屬性,并應用于頁巖的裂縫發育帶檢測中.實驗結果表明,不同頻率尺度下的單頻相干屬性反映了不同尺度的斷層、裂縫特征,而分頻重構相干屬性則更加直觀地反映了研究區不同尺度斷層、裂縫的整體特征.利用分頻相干技術實現了頁巖裂縫發育的精細描述與刻畫.
  • 摘要：The Shuiyindong deposit and Taipingdong deposit in the Huijiabao ore field are selected to study the migration regularity and mode of elements in the process of wallrock alteration of the Carlin-type gold deposit and to explore the internal relationship between the alteration and gold mineralization.Study of typical surrounding rocks,mineralization rocks,ore petrographic characteristics and corresponding grant mass balance equation shows that the type of wallrock alteration corresponding to the metallogenic stage of the Carlin-type gold deposit is consistent with the element migration law revealed by calculation.Geochemical thermodynamics calculation suggests that gold mainly migrates in the form of AuHS0 complex in the ore-forming solution.It shows that the wallrock alteration in different metallogenic stages promotes the migration of major ore-forming materials in the Carlin-type gold deposits,and then precipitates and enriches the gold ore formation.%選擇貴州省灰家堡金礦田內最為典型的水銀洞礦床和太平洞礦床,研究卡林型金礦床圍巖蝕變過程中元素遷移規律與方式,探討圍巖蝕變與金礦化的內在聯系.典型礦床圍巖→礦化圍巖→礦石的巖相學特征及與其對應的Grant質量平衡方程計算結果表明,卡林型金礦各成礦階段所對應的圍巖蝕變類型與通過計算所反映的元素遷移規律相一致;地球化學熱力學計算結果顯示,Au主要以AuHS0絡合物的形式在成礦溶液中遷移.元素遷移研究的結果證明不同成礦階段發生的圍巖蝕變促進卡林型金礦主要成礦物質發生遷移,進而沉淀富集成礦.
  • 摘要：兼具科學性和藝術性的公路選線設計對個人經驗依賴較大,雖然隨著工程實踐和人們認識的不斷深入和進步,設計理念也從選線地質逐步深化到地質選線,但仍未完全形成系統的方法論.本文通過對部分路線設計案例的成功經驗和失敗教訓的歸納和總結,并結合多年路線設計的經驗,提煉出“服務功能和承載能力相協調、自然生態可持續發展、控制因素的系統綜合分析、最差的地質條件控制路線方案(‘木桶’原理)、重大工程地質問題否決路線方案、綜合選線與整體最優”等公路工程地質選線基本原則,總結出按“以服務功能草定路線走向→宏觀識別、碎部研判,優選路線走廊→走廊帶工程地質條件綜合評估→根據地形條件初擬路線方案→結合工程地質修訂確定推薦線位→推薦線位的工程地質條件評價→推薦線位的比選和修訂”程序進行地質選線工作的一般程序和定性研究基本方法.%Design of highway route line selection rely too much on personal experience.Its concept and idea has gone through line selection geology to geological selection line.The successful experiences and failure lessons based on some highway design line projects are summarized and concluded in the paper based on some highway design line projects.It is considered that the design of highway route line selection should abide by following 6 principles:(1) the service function should integrate with the bearing capacity;(2) the sustainable development of natural ecology should be seriously considered;(3) controlling factors should be comprehensively analyzed;(4) the worst geological condition route scheme should be controlled;(5) major engineering geological problems should overthrow route scheme;and (6) the best route scheme should be selected through comprehensive route line selection.The general processes and basic study methods of design of highway route line selection are summarized as follows:initial determination of route line direction based on service function →macroscopic discrimination and microscopic study and judgment → selection of preferred route line corridor → assessment of engineering geology condition for recommended route line → comparison and selection and modification of recommended route line.
  • 摘要：丁烷與甲烷、乙烷、丙烷同為天然氣的烷烴氣組分,但是對其研究及應用明顯不如甲烷、乙烷及丙烷.本文在川西拗陷天然氣地球化學分析測試的基礎上,重點對天然氣中丁烷的地球化學特征進行分析,探討丁烷與天然氣成因、天然氣運移的關系.測試結果顯示,研究區天然氣以烷烴氣為主,其中甲烷含量最高,其體積分數＞85％,平均值＞93％;重烴含量相對較低.研究區天然氣中丁烷含量較低,其體積分數＜1％;其中異丁烷與正丁烷含量相當,體積分數均不超過0.5％.iC4/nC4值能示蹤未受到明顯次生變化天然氣的成因類型,煤型氣iC4/nC4 ＞0.8,油型氣iC4/nC4 ＜0.8;受到次生作用影響的天然氣,iC4/nC4值可能失去判別天然氣成因類型的功能.目前,對iC4/nC4值能否示蹤天然氣運移及其示蹤機理存在較多爭議,在研究區iG/nC4值就未能有效示蹤天然氣的垂向運移過程,因此在選擇該指標示蹤天然氣運移時應慎重.%Butane together with methane,ethane and propane is the component of alkane of natural gas.The paper studies the natural gas in West Sichuan depression,analyzes geochemical characteristics of butane in natural gas,and explore the relationship among butane,natural gas origin and gas migration.It shows that the natural gas in the studied area is mainly alkane and the methane content is high with volume fraction over 85％,and with the average values over 93％.By contrast,heavy hydrocarbon content is relatively low.In the research area the content of butane is low with the volume fraction less than 1％ and the content of isobutene and normal butane are fairly the same with the volume fractions less than 0.5 ％.The iC4/nC4 value and gas genetic type analysis can be used as an index to distinguish the oil-type gas from coal-type gas,especially for natural gas which has not been affected by secondary changes obviously.When iC4/nC4＞0.8,the gas is coal-type gas and when iC4/nC4＜0.8,the gas is oil-type gas.However,if gas is affected by the secondary changes,the iC4/nC4 value can not be used to distinguish the genetic type of natural gas like the studied area.Presently,there are many controversies whether the iC4/nC4 value can be used to trace gas migration or not.Therefore,caution should be exercised when applying the index to trace migration of gas.
  • 摘要：針對塊狀、復雜巖性區地震儲層預測的難題,提出巖性地貌體概念.它是沉積體的巖性和形態特征的綜合體,也是沉積體和縱橫向反射結構特征對應關系的綜合體,它的類型由地質體的沉積相、巖性、成層性和地震縱橫向反射結構綜合劃分.該方法試圖綜合利用地震相、地震地貌及反演等多種信患,采用雙域雙面沉積體邊界解釋技術,降低復雜巖性預測時的多解性.提供巖性地貌體方法的關鍵技術及工作流程,并針對巖性復雜的湖底扇沉積進行了應用.研究中優選巖性地貌表征屬性,并在平面—剖面相互約束下完成巖性地貌體解釋.這套基于巖性地貌體的相控儲層預測技術,對于塊狀、橫向變化快、巖性復雜的湖底扇儲層預測效果明顯.%The concept of lithologic geomorphy is proposed for reservoir prediction in non-layered media and areas with complex lithology.It is a combination of geobody and its seismic reflections and their genetic relationships.Defined by sedimentary facies,lithology,stratification and seismic reflections,interpreted both by wheeler domain,time domain,plane and cross section,it tries to predict complex lithology by integrating seismic facies,seismic geomorphy and inversion methods.In the paper,a workflow and key techniques of lithologic geomorphy method are proposed and applied in a sub-lacustrine fan case.Some attributes are chosen to characterize the lithologic geomorphy,then lithologic-geomorphy units are interpreted under constrain of seismic-facies.This set of faciescontrolled reservoir prediction techniques based on lithologic geomorphy method can apply to reservoir prediction for sub-lacustrine fan with strong lateral variations in thickness and complex lithology.
  • 摘要：Geological anomaly theory,multiple technical approaches of factor analysis,trace elements analysis,trend surface analysis and data normalization treatment are used to discuss the controlling factors and distributive characteristics of the effective source rock of Chang-7 Member of Triassic Yanchang Formation in Ordos Basin.A method of geological data collection and information integration on the source rock of Chang-7 Member is proposed.It is indicated that the biological burst of the lower aquatic paleo-organisms (type index of organic matter) and degree of thermal evolution of organic matter are the main controlling factors to the development of effective source rock under the background of a generally high content of total organic carbon.The relatively concentrated distribution of effective rock is generally located in the south Jiyuan,west Dingbian,east Youfangzhuang,Huachi area and the northeast Heshui,which indicates a certain degree of relating and controlling effect on the zones of tight oil high production.The study reveals that the favorable direction for future exploration and exploitation of tight oil in Chang-7 Member includes the area from Gengwan to Huanxian,the north Huachi,Youfangzhuang to Wucangpu area and the Dingbian area.%探討鄂爾多斯盆地上三疊統長7段致密油有效烴源巖的主控地質因素及分布特征.結合地質異常理論,采用因子分析、痕量元素分析、趨勢面分析及標準化處理等技術手段,提出一種對研究區長7段烴源巖進行地質數據挖掘與信患整合的評價方法,建立表征烴源巖品質的綜合性無因次線性組合,揭示出在有機碳豐度普遍較高的背景下,有效烴源巖的發育主要受控于低等水生生物勃發(有機質類型指數)與有機質熱演化程度(鏡質體反射率).有效烴源巖集中分布于姬塬南部、定邊西部、油房莊東部、華池地區及合水東北部,對致密油高產富集帶的分布具有一定的控制作用.有利于進一步提高長7段致密油勘探開發成效的地區主要是耿灣—環縣、華池北部、油房莊—吳倉堡及定邊.
  • 摘要：The analysis method of homology identification of network attack is discussed in order to provide basis for attack scenario restoration,attack qualitative,and attacker traceability in the background of big data.An attack description method based on evidence chain is proposed,and the key fingerprints of each link of the network attack chain are summarized.Furthermore,the corresponding model for identification of the homology of network attacks is proposed.The edit distance between each link is calculated to describe the similarity,and the algorithm fusion of similarity is designed by neural network method.Then,the homologous decision of network attack is recognized.It shows that this method can effectively determine the homology of network attacks,with more accurate result over the sample-based method.This work provides an effective approach for improving the ability and automation of homology judgment of network attacks in big data.%探討大數據背景下網絡攻擊同源性的分析方法,為攻擊場景還原、攻擊定性及攻擊者溯源提供依據.提出了一種基于證據鏈的攻擊描述方法,并歸納出各環節代表特異性的關鍵指紋,進一步構建了相應的網絡攻擊同源性判定模型,使用編輯距離計算攻擊鏈單一環節之間的特征相似度,通過量子神經網絡方法對多個攻擊環節的相似性進行算法綜合,進而實現網絡攻擊的同源判定.測試結果表明,該方法能夠有效地對網絡攻擊進行同源性判定,相比基于樣本的方法更加準確、可靠.該工作為大數據下提高網絡攻擊溯源能力及自動化水平探索了一條有效途徑.
  • 摘要：基于Bolton & Whittle建議的能量法則表達來推求土體不排水抗剪強度力學參數,結合孟加拉某工程場地的劍橋型自鉆旁壓試驗成果,計算不同深度的黏性土的不排水抗剪強度值.采用Marsland & Randolph提出的分析方法獲取該值,對比可知2種方法的計算結果極其相近,驗證了基于能量法則的表達推求土體不排水抗剪強度指標的可靠性,且可認為旁壓試驗成果曲線擴孔壓力-對數剪切應變曲線塑性部分的擬合直線斜率即為不排水抗剪強度,截距即為極限壓力值.通過基于劍橋型自鉆旁壓試驗和不排水抗剪強度理論計算表明,劍橋型旁壓試驗及該理論計算方法適宜于用作確定黏性土的不排水抗剪強度.%The Bolton & Whittle resenting theory of energy law,in combination with the results of project SBPT in Bangladesh,is used to calculate the undrained shear strength (Cu) value of clay.Also,Marsland & Randolph method is adopted to calculate the value of undrained shear strength.It shows that result calculated by these two methods is very similar and reliable for calculation of Cu.It reveals that the Cu and limit pressure (pL) can be obtained from the plastic part gradient and intercept of the curve of total expanding pressure versus the logarithmic plane shear strain.In practical,the SBPT and the theory are suitable for the confirmation of undrained shear strength of clay soil.
  • 摘要：Data of drilling cores,logging and three dimensional seismic data are used to discuss the characteristics of seismic geology,spatial distribution of favorable reservoir and evolution regularity of the carbonate sedimentary system in Lower Cretaceous Albian Stage in Lower Congo Basin,so as to provide geological evidence for the prediction and selection of exploration targets.It shows that the Block A and its adjacent area in Albian Stage,Lower Congo Basin can be classified into 3 kinds of hybrid facies,6 kinds of subfacies and even more kinds of microfacies.On the basis of establishment of sedimentary model of hybrid facies,the growth period,direction and paleotopography height of beach body are determined,the development and evolution rules of the beach body in the key section of Block A and adjacent area are clarified,the sedimentary evolution history of SQ2 and SQ3 sequence is finely reconstructed and the evolution characteristics of each sequence and the distribution rules of favorable reservoir facies belt are recognized.Accordingly,a research system of comprehensive multi scale combination is proposed and the 3D dynamic sedimentary evolution model of Albian Stage in the Lower Congo Basin is established.It reveals that the platform gully controls the belt,platform margin controls the beach and beach controls reservoir is the reservoir development mechanism in the area.%在構造-沉積模式理論指導下,綜合利用鉆井巖心、測井和三維地震資料,探討下剛果盆地下白堊統Albian階碳酸鹽巖沉積體系的地震沉積學特征及有利儲層發育相帶的空間展布和演化規律,為有利區塊預測和勘探目標優選提供地質依據.結果表明:下剛果盆地A區塊及鄰區Albian階可歸納出3種混積相和6種亞相及更多的微相類型;在建立混積相沉積模式的基礎上,確定了灘體生長期次、方向和古地貌高,明確了A區塊及鄰區塊重點層段灘體發育演化規律,精細恢復了SQ2和SQ3層序沉積演化史,識別出各層序內部演化特征和有利儲層發育相帶分布規律.提出了井震一體化多尺度融合研究思路,系統建立了下剛果盆地Albi-an階三維沉積動態演化模式,論證了“臺溝控帶、臺緣控灘、灘控儲層”的優勢相帶和儲層發育機理.
  • 摘要：The accumulation regularity of high quality reservoir of Chang-3 Member of Upper Triassic Yanchang Formation is discussed so as to provide data for the exploration of similar type of oil pool.Focus is put on the study of reservoir development characters of the palaeo-geomorphology,especially on the slope adjacent to the unconformity plane and hills,by using the method of recovery of ancient topography.It shows that the corrosion by infiltration meteoric water to the Yanchang Formation reservoir under the unconformity plane is strong,and it is the key factor to the formation of high-quality reservoir and favorable for the charging and accumulation of oil and gas.Therefore,the slope and hills of the ancient topography are the favorable areas for evaluation and exploration of high-quality reservoir.%探討鄂爾多斯盆地演武油田長3油層段相對優質儲層富集規律,為同類型油藏勘探開發提供借鑒.從研究區長3油層段砂巖儲層的沉積背景、成巖作用和微觀特征入手,運用古地貌恢復等方法,對古地貌單元中鄰近不整合面的斜坡和殘丘帶的儲層發育特征進行了重點研究.結果表明研究區延長組古暴露面上發生的下滲大氣水對不整合面之下儲層進行的溶蝕改造最為強烈,是形成相對優質儲層的關鍵因素,有利于油氣充注成藏.古地貌單元中的斜坡和殘丘帶是優質儲層的勘探評價有利區帶.
  • 摘要：Lateral and vertical favorable migration pathways of hydrocarbon were analyzed based on abundant drilling data of Bodong area,and the hydrocarbon migration and accumulation patterns of uplift and ramp area were established in this paper.It reveals that buried-hill unconformity and regional sandstone layer are essential transporting ridge channels,the existence of deep ridge is fundamental for the accumulation of Neogene hydrocarbon,and shallow hydrocarbon migration is greatly controlled by the coupling of these ridges and faults.According to the assemble style between traps and faults,the coupling relationship are divided into contact-type and non-contact type,and the former can be further divided into trap-controlling type and non-trap controlling one.It shows that the contact type is favorable for shallow hydrocarbon migration,while those trap-controlling types are the most optimum ones.An effective predict method of hydrocarbon accumulation coefficient is proposed by consideration of size and contact area between the transporting ridges and effective source rocks,trap area along transporting ridges and differential pressure in accordance with available drilling results.Hydrocarbon accumulation coefficient is controlled by fault activity and regional seal thickness,ratio between fault throw and cap rock thickness can be used as a semi-quantitative evaluation index.Statistics show that 0.25 and 1 is the threshold of regional seal of Dongying Formation and the Lower Member of Neogene Minghuazhen Formation,respectively.It shows that the distribution area of transporting ridges is important in the exploration of hydrocarbon,and the shallow layers with well coupled "ridge-fault" are the most favorable shallow exploration targets.%利用渤東地區豐富的鉆探資料,開展油氣橫向與垂向運移路徑研究,總結遠源型凸起區和斜坡帶的油氣運聚規律.研究表明,潛山不整合面和館陶組底部區域砂巖是輸導脊的2種通道類型.輸導脊是淺層新近系油氣富集的基礎,它與斷層耦合程度控制淺層油氣運移.根據輸導脊上圈閉與斷層的接觸方式,“脊-斷”耦合關系分為接觸式和非接觸式,接觸式進一步細分為控圈式和非控圈式.只有接觸式的“脊-斷”耦合關系才利于淺層油氣運移,其中控圈式的接觸關系淺層運移條件最優越.綜合考慮輸導脊規模及其與有效烴源巖的接觸范圍、輸導脊上圈閉面積及其與有效烴源巖之間的壓差等參數,構建的輸導脊油氣運聚系數可以較好地反映輸導脊的運聚能力.油氣富集層系受斷層活動強度與區域蓋層厚度綜合控制,利用斷蓋比參數可以定量判斷,斷蓋比值0.25和1分別是深層東營組、淺層明下段底部區域蓋層遮擋的臨界值.輸導脊分布的區域是遠源油氣勘探的重要區帶,“脊-斷”耦合好的構造是淺層有利勘探目標.
  • 摘要：The property of stretched exponential production decline model (SEPD) is studied and the way of seeking the parameter for SEPD is exercised in order to explore production decline analysis for deep tight gas reservoir.Theoretical derivation and comprehensive analysis for the Xu-5 reservoir reveal that the SEPD is characterized by "three parameters","one correlation" and "boundedness",and accordingly,a method of multiple position sampling and gradient descent is proposed to obtain parameters for the model.The application of SEPD to the Xu-5 (Member 5 of Upper Triassic Xujiahe Formation) gas reservoir in Xinchang area indicates that production decline characteristics of Xu-5 are in accordance with SEPD,and the multiple position sampling and gradient descent method can effectively obtain the model parameters.Therefore,this method is important in the prediction and evaluation of production of gas field.%研究擴展指數(SEPD)遞減模型的性質與參數求取方法,探索深層致密氣藏的遞減分析方法.通過理論推導與新場須五氣藏開發實踐的綜合分析,結果表明SEPD遞減模型具有“雙三一相關”以及“有界性”特征,并針對新場須五氣藏提出了“多點采樣梯度下降法”求取模型參數的方法.實踐表明,新場須五深層致密氣藏遞減特征與SEPD遞減模型的遞減特征一致,采用“多點采樣梯度下降法”可有效地求取模型參數,進而為開展深層致密氣藏產量預測與儲量評價提供保障.
  • 摘要：This article discusses the calculation and evaluation method of the settlement of pile group foundation of urban viaduct,and provides theoretical basis for the safety evaluation of pile foundation settlement.Based on the influence factors of pile foundation settlement of deep soft soil stratum,current computing methods in engineering of settlement,such as equivalent footing method,equivalent sum of slice,elastic theory method and Flac 3D numerical simulation method,are separately used to calculate the settlement and to analyze the change regularity of stress and displacement fields to viaduct in specific engineering project and compared these research results with the measured data.The results show that it is better to use equivalent footing method and elastic theory method in the practice application.Though,equivalent sum of slice and numerical simulation method have a popular application,they usually yield larger results which affect the engineer project.This research provides a reliable foundation for the settlement evaluation of pile foundation of similar engineering geological conditions.It reveals that only the settlement value is calculated by at least three or more methods and the calculated settlement value less than allowable value,can it meet the safety requirements of construction.%探討城市高架橋群樁基礎沉降量計算評價方法,為樁基沉降安全評價提供理論依據.在詳細總結深厚軟土層區群樁基礎沉降的影響因素和目前工程中常用的沉降量計算方法的基礎上,針對具體的工程實例采用等代墩基法、等效作用分層總和法、彈性理論法以及Flac 3D數值模擬方法分別計算了高架橋群樁基礎的沉降量和應力位移場變化規律,并與實測數據進行對比分析.結果表明,采用彈性理論法和等代墩基法計算沉降量與實際吻合較好,等效作用分層總和法和數值模擬方法計算結果雖然偏大,但應用的范圍較廣.至少3種方法得到的沉降量均小于允許值,才能判定沉降量滿足安全要求.
  • 摘要：On June 24,2017,a large rocky landslide occurred at the Xinmo village,Maoxian County,Sichuan,after the Wenchuan earthquake in 2008.The landslide is huge and destructive,resulting in huge loss of life and property.Based on the field survey data and other collected data,the geometric characteristics and sedimentary characteristics of the Maoxian landslide are studied,the characteristics and effect of rainfall,historical earthquakes and active faults on the landslides are discussed,and the sliding mechanism and dynamic mechanism of Maoxian landslide are proposed.The study reveals that the landslide is located in the special area clamped by Songpinggou fault and the Minjiang fault with a steep slope landform and the faults are characterized by "X" pattern in the plane with a back thrust mode in the profile.Investigation shows that intense historical earthquakes have occurred in the area and the strong repetitive vibration destroyed the rock mass structures.Therefore,the active faults and historical earthquakes in the area are the main factors responsible for the formation of the Maoxian landslides,and the rainfall is only the predisposing factors trigger the landslides.The in site investigation also demonstrates that the sliding model of Maoxian landslide is characterized by layer parallel pull-apart together with slope parallel sliding.These are 3 stages in the formation processes of Maoxian landslide,beginning with the mountain rock cracking stage,then the high speed crushing stage and followed by debris flow accumulation stage.The steep slope and downward grade provide potential energy for the landslide.Well developed permeability interface between meta-sandstone and slate provide sliding condition bringing in the layer parallel pull-apart and slope parallel sliding.The fault compression induced uplift of Fugui Mountain,together with the accumulation of high-intensity historical earthquake vibration and accumulation of deformation,which resulted in long-term damage to the mountain rock structure,are the fundamental factors leading to the Maoxian landslide.%2017年6月24日在四川茂縣新磨村發生商位巨型滑坡,是汶川地震后所發生的規模最大的一次巖質滑坡,滑坡體積巨大,破壞性強,造成了巨大的損失.基于現場調查資料和搜集的相關資料,描述了茂縣滑坡的幾何形態特征和沉積物特征,初步探討了該區降雨條件、歷史地震、活動斷裂等特征及其對滑坡發生的影響,提出了茂縣滑坡的滑動機制和動力學機制.主要成果包括:(1)茂縣滑坡所在的富貴山處于松坪溝斷裂和岷江斷裂交匯和夾持的區域,顯示為擠壓型高陡(微)地貌,并具有“X”形平面斷裂組合樣式和“背沖式”剖面組合樣式.(2)該區經歷了多次強烈歷史地震的影響,反復強烈的震動及疊加、累積變形破壞了巖體結構、坡面結構,降低了巖石的內聚力、摩擦強度和斜坡巖體的穩定性,并導致該區滑坡降雨闞值的降低,表明活動斷裂及其歷史地震是驅動茂縣滑坡形成的主要控制因素,而降雨僅為誘發因素.(3)茂縣滑坡的滑動模式為順層拉裂-順坡滑脫型模式,滑動過程可分為山體裂解階段、高速潰滑階段、碎屑流堆積階段.在此基礎上,提出了茂縣滑坡的成因機制,主要表現在:高陡的單面山斜坡(順層、順坡)的臨空條件是滑坡產生的勢能條件;貫通性好的變質砂巖與板巖之間的滑動面(層面)是滑坡形成順層拉裂-順坡滑脫的滑動條件;富貴山兩側活動斷裂對該山體的擠壓抬升以及多次高強度歷史地震的震動、變形的積累及其對巖體結構的長期破壞,是導致滑坡產生的地質條件.
  • 摘要：According to the characteristics,origin,source and distribution,the crude oil of the Albian Sendji Formation of deepwater area in the northwest Lower Congo Basin is generally light crude oil based on the study of the physical parameters,stable carbon isotope and biomarker compounds of 15 crude oil samples from 7 wells in the area.It reveals that the crude oil of the Sendji Formation in the 3 oilfields on the landward is characterized by lacustrine crude oil,which is derived from the lacustrine hydrocarbon source rock of the subsalt lake.However,the crude oil from the Sendji Formation of the MOHO oilfield in the ultra deepwater area on the seaward area,shows characteristics of marine crude oil,possibly resulted from the marine source rocks of Likouala Formation.Generally,lacustrine oil is mainly distributed in the landward side of the shallow water and part of the deep water area,marine crude oil is mainly distributed in seaward side of deepwater and ultra deepwater,and the mixed oil with lacustrine and marine facies is in the middle transitional zone.%針對下剛果盆地西北部深水區Albian階Sendji組原油的特征、成因、來源及分布規律等問題,通過對該區7口鉆井15個原油樣品的物性參數、穩定碳同位素、生物標志化合物等方面的研究,結果表明,Sendji組原油總體為輕質原油,向陸一側的3個油田中Sendji組原油具有湖相原油的特征,可能來源于鹽下湖相烴源巖;向海一側超深水區MOHO油田Sendji組原油具有海相原油的特征,可能來源于Likouala組上部海相烴源巖.下剛果盆地海域的湖相原油主要分布在近陸一側的淺水和部分深水區,而海相原油主要分布在向海一側的深水及超深水區,中間過渡帶分布湖相和海相的混合原油.
  • 摘要：探討渤海灣盆地沾化凹陷頁巖油儲層不同巖石礦物的孔隙發育特征,為頁巖油勘探開發提供基礎資料.取自沾化凹陷羅69井古近系沙河街組頁巖油層段21塊自然斷面和氬離子拋光巖心樣品,利用場發射掃描電鏡圖像定量研究頁巖油儲層不同巖石礦物的孔隙發育類型、孔徑分布及其面孔率貢獻.結果表明沙河街組頁巖油主要孔隙類型有泥巖中的泥質碎片間微孔和泥晶灰巖中的方解石溶蝕孔,其中的微米級孔隙提供了頁巖油的主要儲集空間.納米級孔徑為主的方解石晶間孔、晶內孔和黃鐵礦晶間孔數量多,但孔隙面孔率很低.沾化凹陷頁巖油開發的主要對象為微米級泥質粒間孔和方解石溶蝕孔發育層段.%Pore development characteristics of different rocks and minerals in shale oil reservoir in Zhanhua Sag of Bohai Bay Basin are discussed and studied in order to provide basic data for exploration and development of shale oil.21 natural section and argon-ion polishing samples from Well Luo-69 for the Paleogene Shahejie Formation in Zhanhua Sag are selected,and the pore development types,pore size distributions and plane porosity contribution of different rocks and minerals of shale oil reservoir are quantitatively studied by field emission scanning electron microscope image analysis.It shows that the main pore types of shale oil in Shahejie Formation consist of argillaceous inter-particle pores in mudstone and calcite dissolved pores in micrite,and the micro-pores provide main reservoir space for shale oil.The amount of calcite inter-crystal pores,intra-crystal pores and pyrite inter-crystal pores are mainly in nanometer scale with very low pore plane porosity.It reveals that the main target of shale oil development in Zhanhua Sag is the developed intervals of micro-scale argillaceous inter-particle pores and calcite dissolved pores.
  • 摘要：The formation,evolution and sedimentary characteristics in the south margin of Ordos Basin are closely related to the activities of the Qinling Orogenic Belt in the south of North China Cratonic Basin.Provenance characteristics of late Paleozoic sediments in the area are studied so as to extract information on the evolution of the Qinling Orogenic Belt.Based on petrological characteristics from two field sections of Benxi-Shiqianfeng Formation in Chengcheng and Hancheng,provenance information of the late Paleozoic sediments in southern Ordos Basin and evolution process of the north Qinling Orogenic Belt in late Paleozoic is obtained through analysis of rock compositions,grain compositions,heavy mineral compositions and tectonic setting discrimination by Dickinson triangular diagrams.It reveals that the provenance of Benxi-Taiyuan Formation is originated from the southern margin of the Qinling Orogenic Belt of North China Plate,and the provenance of Shanxi-Shiqianfeng Formation is originated from the north Qinling tectonic belt.Initial point collision of Shangdan belt during late Devonian and late Carboniferous period resulted in the uplift of the southern margin of the North China Plate.From early Permian,Qinling Orogenic Belt entered into surface collision stage and resulted in uplift of the north Qinling back-arc basin and island arc belt successively,which became the main provenance of the south margin of Ordos Basin.The east-west collision like scissors between the Yangtze plate and the North China Plate resulted in the change of paleocurrent direction from northwest in the Shanxi Formation to northeast in the Lower Shihezi Formation.%鄂爾多斯盆地南緣位于華北克拉通盆地的西南部,其形成演化和沉積過程與華北克拉通南側秦嶺造山帶的活動有緊密的聯系.晚古生代沉積的物源特征能夠幫助提取關于秦嶺造山帶的演化信息.基于對鄂爾多斯盆地南緣澄城和韓城2條出露本溪組－石千峰組的剖面巖石學特征的詳細研究,從巖石性質、碎屑特征、重礦物組合和碎屑組分的Dickinson三角圖解等方面進行分析討論,獲得了鄂爾多斯盆地南緣晚古生代物源的詳細信息,并揭示了秦嶺造山帶北部晚古生代的演化過程.研究表明,本溪組－太原組的物源為秦嶺造山帶中的華北板塊南緣帶;山西組－石千峰組的物源來自于北秦嶺構造帶,物源區有向南遷移的特征.晚泥盆－晚石炭世商丹帶的點接觸初始碰撞造成華北板塊南緣發生抬升,早二疊世秦嶺造山帶進入面接觸碰撞階段,造成北秦嶺弧后盆地和島弧帶依次發生隆升,成為鄂爾多斯南緣沉積區的主要物源供給區.揚子板塊與華北板塊自東向西剪刀狀的碰撞,造成鄂爾多斯南緣沉積的山西組－下石盒子組的古流向由南東－北西方向朝南西－北東方向的轉變.
  • 摘要：針對重采樣導致的權值退化問題,應用遺傳算法的進化思想來優化重采樣算法,將粒子權值作為適應度值,合理設定閾值,利用最佳個體保存法保存高適應度粒子,利用自適應交叉、變異操作對低適應度粒子進行進化,將高適應度粒子與進化粒子組合成新的粒子集進行狀態估計.仿真實驗表明,該算法具有良好的實時性和估計精度,其狀態估計精度比標準粒子濾波提高近24倍,比無跡卡爾曼粒子濾波提高近4倍,耗時約為無跡卡爾曼粒子濾波的1/10.%An improved adaptive genetic particle filter algorithm is proposed in order to alleviate weights degradation of particle filtering algorithm.Particle weight is regarded as fitness values,and a percentage of big weight particles are obtained with the best individual preservation method.Crossover and mutation operations are adopted for the remaining particles.Then formed a new set of particles with saved particles,crossover and mutation particles,and state estimation calculations is done.Maintaining the diversity of the particles at the same time,it avoids algorithm falling into local optimum and improves the global search ability of the algorithm.The simulation results show that,compared with the standard particle filter,the proposed algorithm can improve the accuracy of state estimation by nearly 24 times,4 times higher than that of the Kalman particle filter,and it has high real-time performance and good estimation accuracy.
  • 摘要：The three-dimensional and three component (3D 3C) VSP belong to the underground seismic exploration method,and the VSP data contain abundant depth and lithology information.Therefore,three-dimensional and three component (3D 3C) VSP have incomparable advantage over ground seismic.Accurate inversion of lithology and elastic parameters is needed by three-dimensional and three component VSP data in the subsequent application to precise prediction of reservoir and recognition of fluid property,so as to improve the success rate of oil and gas exploration.Exact multiwave amplitude-versus-angle (AVA) equations are studied based on the theory of elastic wave propagation in anisotropic media (VTI),and the theory and method for three-dimensional (3D) vertical seismic profiling (VSP) of multiwave joint pre-stack AVA lithologic parameter inversion for anisotropic media are established.This method directly inverts the P-wave (compressional wave) velocity,S-wave (shear wave) velocity,density,and two anisotropy coefficients of strata by using normal move out gathers from 3D three-component (3C) VSP data processing.Based on these inversions,the elastic parameters of the strata,which are important in identification of lithology and fluids,can be further calculated.This method of P-wave and S-wave joint pre-stack inversion is suitable for 3D 3C VSP data of vertical and inclined drilling wells.This method is proved to be correct and effective in the practical validation of inclined drilling well,which is predicted by actual processing of 3D 3C VSP data.%三維三分量(3D 3C) VSP屬于地下地震勘探方法,三維三分量VSP地震資料合有深度和豐富的地層巖性信息,有地面地震不可比擬的優勢.為了發揮和應用三維三分量VSP資料的優勢,提高油氣勘探的成功率,需要反演出準確的巖性及彈性參數,用于精確預測儲層、識別流體性質.以各向異性介質(VTI)彈性波傳播理論為基礎,研究多波精確振幅特征方程(AVA),并在此基礎上建立了三維各向異性介質VSP多波聯合疊前AVA反演巖性參數理論和方法.該方法利用對3D 3C VSP資料處理的NMO道集,直接反演地層縱波速度、橫波速度、密度及2個各向異性系數,在此基礎上可進一步計算得到地層的彈性參數,這些參數對巖性及流體識別有重要作用.這套縱橫波聯合疊前反演方法適應直井及斜井3D 3C VSP資料,并經實際斜井3D 3C VSP資料處理,得到了與實際儲層吻合的反演結果,證明了該方法的正確性和有效性.
  • 摘要：探討四川盆地東南部下志留統小河壩組砂巖形成優質儲層的控制因素及形成機制.以野外剖面測量為基礎,通過孔滲分析、薄片鑒定、陰極發光及掃描電鏡等手段,結合前人的研究成果,對小河壩組海相碎屑巖的儲層形成機制進行分析.認為沉積微相控制了儲層形成的先決條件,水下分流河道和遠砂壩主要沉積了一套粉砂巖,具有形成儲層的先天條件;而分流間灣主要沉積了一套泥巖或粉砂質泥巖,不能形成儲層.生烴中心對小河壩組儲層具有重要的控制作用,砂巖中瀝青的含量與生烴中心的距離具有明顯的負相關性.巖性在縱向上的疊置關系也是影響儲層形成的重要因素,具有砂泥互層的地層結構,因砂巖不易壓實和膠結,可形成相對較好的儲層;而厚層的砂巖因壓實和膠結作用嚴重,反而難以形成好的儲層.%The Lower Silurian Xiaoheba Formation is an important target for oil and gas exploration in Sichuan Basin.The sandstone in Xiaoheba Formation is very tight,but it can form relatively good quality reservoir.Based on the measured natural profiles as well as previous research results,the controlling factors of reservoir quality and mechanism for the formation of relatively high-quality reservoir are studied by means of property testing,thin section identification,cathodoluminescence,scanning electron microscope and other technical methods.It is considered that the sedimentary microfacies are prerequisites for the formation of reservoir.The siltstone deposited in the subaqueous distributary channel and distal bar is favorable for the formation of reservoir,while the mudstone or silty mudstone deposited in the bay between underwater distributary channels are hard to form reservoir.Hydrocarbon-generating center is very important for the formation of reservoir and a negative correlation exists between the solid bitumen content and the distance from sandstone to hydrocarbon-generating center.Superimposed relation among various lithological layers is also an important factor controlling the formation of reservoir.Sandstone intercalated with mudstone can form reservoir easily as the sandstone is not easily cemented and compacted,while the thick bedded sandstone is hard to form high quality reservoir because of its strong compaction and cementation during the diagenesis.
  • 摘要：Triassic in Sichuan Basin is the main production formation of polyhalite,which generally has a buried depth of 1～4 km,and a single layer thickness of 1 m.This paper discusses the geophysical technical method of quantitative prediction of polyhalite.However,seismic characteristics of polyhalite in the basin are not well studied at present.So,the exploration of polyhalite in this area is extremely challenging.Various seismic exploration technologies,such as layer flattening technique,impression method,seismic attribute technology and seismic motion inversion technology,are studied in consideration of the particular physical properties of polyhalite.A technique process of polyhalite quantitative prediction is proposed in the paper so as to provide theoretical and technical support for Triassic polyhalite exploration and development in Sichuan Basin.Since the genesis and the migration of polyhalite has a complex relation with fault,high resolution AFE technique is used for the prediction of fractures.It proves that the polyhalite in the region is related to fractures.%探討雜鹵石定量預測的技術方法流程.四川盆地三疊系是雜鹵石礦的主要產出層段,但因埋藏深(1～4 km)、厚度薄(單層厚度1 m),勘探難度大.針對雜鹵石的特征,從地震勘探角度出發,采用層拉平技術、“印模法”、地震多屬性分析技術、井震協同反演技術相結合,進行各種地震勘探技術研究,總結出一套適用于雜鹵石定量預測的技術方法流程.雜鹵石的成因、運移以及與斷層的關系復雜,通過采用高分辨率AFE技術對其進行疊后裂縫預測,認為川東地區雜鹵石與裂縫有關.
  • 摘要：為了提高儲層預測及表征精度,對基于地震反演約束的儲層三維建模技術方法進行了研究及應用.首先利用地質統計學反演方法生成縱波阻抗三維數據體,與常規確定性反演結果相比,地質統計學反演方法建立的波阻抗數據體具有較高的縱向分辨能力和橫向預測趨勢,可反映井間薄儲層的厚度及物性變化.其次,建立了縱波阻抗與巖性及孔隙度、滲透率、飽和度的巖石物理模版,其低阻抗值代表儲層發育好的層段和位置.最后,以縱波阻抗數據體作為趨勢約束,采用隨機模擬算法,建立了研究區的巖性模型及儲層屬性模型.通過實鉆井檢驗,模型結果與井點資料符合較好,顯示了模型的精度和本文方法的可靠性,可以滿足精細油藏描述和剩余油挖潛需求.%3D modeling technology based on seismic inversion constraint is studied in order to improve reservoir prediction and characterization accuracy.The comparison of 3D wave impedance obtained by geostatistics inversion method with the conventional deterministic inversion results reveals that the wave impedance data by geostatistical inversion method is of higher vertical resolution and lateral prediction,and it can reflect the thickness of thin reservoir and the change of physical property.Accordingly,the physical models of P-wave impedance,lithology,porosity,permeability and saturation are established.The low impedance values represent the well developed layers and positions.Then,the lithological model and reservoir attribute model of the study area are established by using the stochastic simulation algorithm and by taking the P-wave impedance data body as the trend constraint.The practical drilling test proves that the results are in good agreement with the well point data,with good accuracy and reliability.This method can meet the needs of fine reservoir description and potential tapping of remaining oil.
  • 摘要：探討鄂爾多斯盆地南緣渭北地區上三疊統延長組長7油層組油頁巖中的碳酸鹽結核與優質烴源巖發育的關系.通過野外觀察、薄片鑒定、掃描電鏡、X射線衍射和碳、氧同位素等多種分析手段的研究,認為長7油層組灰巖和白云巖結核為成巖早期的產物,方解石和白云石圓球粒的形成時間較早,特征與藻類習性非常相似.δ13C明顯重于晚三疊世δ13C的變化范圍,表明碳酸鹽結核的形成與產烷帶微生物代謝活動引起的甲烷生成有關.結核中方解石、白云石圓球粒的形成可能是藍細菌細胞方解石化或白云石化的結果.長7油層組中富含的碳酸鹽結核指示其為優質的烴源巖,具有良好的生烴能力.%Carbonate concretions,usually the products of microbial activity,can provide the information of diagenetic processes.On the basis of field investigation,thin section observation,application of scanning electron microscopy,X-ray diffraction and carbon oxygen isotopes,the limestone and dolomite concretions,abundant in the oil shales of Chang-7 (Member 7 of Upper Triassic Yanchang Formation) in Weibei area of the southern Ordos Basin,are studied.It is considered that the limestone and dolomite concretions are products of early diagenesis and the formation of calcite pellets and dolomite pellets is formed early and their features are similar to the algae.δ13C,which evidently heavier than the variation range of δ13C during late Triassic,indicating that the formation of the carbonate concretions is related to the methane formation resulted from alkane producing and microbial metabolic activity.The formation of calcite pellets and dolomite pellets in the Chang-7 concretions is probably related to microbial activity and the carbonate nodules in the Chang-7 are indicator of favorable source rocks with good hydrocarbon generating capacity.
  • 摘要：研究鄂爾多斯盆地蘇里格地區蘇5區塊下二疊統盒8段砂體特征,確定有利的勘探目標層位.通過巖芯觀察,結合測井解釋成果,對盒8段沉積相進行研究,確定盒8段下部主要發育緩坡型辮狀河沉積,盒8段上部則主要為多河道低彎度曲流河沉積.根據測井曲線形態對盒8段小層砂體進行對比和追蹤,確定盒8段砂體在研究區中部主要呈近南－北向展布,在研究區西部主要沿北西－南東向展布,而在研究區東部則呈北東－南西向展布的特征.綜合砂巖累計厚度對砂體平面展布及演化特征進行研究,認為物源區構造活動的減緩和河流作用的減弱導致砂體規模逐漸變小.根據砂、泥巖厚度及其組合方式的不同,將盒8段砂體劃分為4種結構類型:連續疊置型、間隔疊置型、互層型和透鏡型.砂體結構與儲集物性存在密切聯系,連續疊置型砂體孔隙度和滲透性最高,而透鏡型砂體物性最差,盒8段下部砂體結構及儲集性能明顯優于盒8段上部,為最有利的勘探目標層位.%Based on the observation of drilling cores and the results of logging interpretation,the sedimentary facies of the Member 8 of Lower Permian Xiashihezi Formation (He-8) in the Block Su-5 of Sulige Gas Field,Ordos Basin are studied.It reveals that the lower part of He-8 Member consists of mainly gentle slope type braided river sediments,and the upper part is mainly composed of multichannel low-curvature meandering river deposit.Small sand bodies of the He-8 Member are compared and tracked according to the shape of the logging curve,and it is suggested that the sand bodies are mainly south-north trending in the middle of the study area,NW-SE trending in the western area,and NE-SW trending in the eastern area.The cumulative thickness of sandstone is used to study the plane distribution and evolution characteristics of sand bodies.It shows that the slow down of tectonic activity and fluviation in the provenance region leads to the decrease of sand body size in Su-5 Block.The He-8 Member sand bodies are divided into four types (continuous superposition type,interval superposition type,interbedded type and lens type) with different thickness and combination of sand and mudstone.The porosity and permeability of continuous superposition type sand body is the best,while the lens type was the worst.It indicates that the sand body structure is closely related with reservoir physical property,and the sand body structure and reservoir physical property of the lower part of the He-8 Member is obviously better than that of the upper part.Therefore,the lower part of the He-8 Member is the most favorable exploration target horizon.
  • 摘要：為了解決門限群簽名方案中聯合攻擊、偽造攻擊、權限、抵賴等問題,本文基于hash函數的單向性、橢圓曲線離散對數問題的難解性,結合Shamir(t,n)門限方案,提出了一種基于ECC存在特權集的(t,n)門限群代理多重簽名方案,滿足((t1’,n1';t1,n1)(t2’,n2';t2,n2))門限特性.該方案利用公鑰環境下交互式身份驗證的方法,增加成員認證密鑰,有效防止密鑰管理中心和簽名服務者的串通陷害;簽名者通過等式驗證密鑰管理中心分配的秘密份額是否有效;代理授權份額的生成由原始簽名者和代理簽名者共同完成,單個簽名的生成使用了簽名者的私鑰和隨機數,有效防范抵賴.安全性分析表明,該方案具有抗聯合攻擊、強不可偽造性、門限特性和匿名性等特點,滿足門限群代理簽名應有的性質.%In order to solve the problems of joint attack,forgery attack,permissions and denial in the threshold group signature scheme,this paper puts forward a (t,n) threshold group-proxy multisignature scheme with privilege subsets of ECC,based on the unidirectional hash function and the intractability of the elliptic curve discrete logarithm problem,and combined with Shamir (t,n) threshold scheme,which meets the features of ((t1',n1';t1,n1) (t2',n2';t2,n2)) threshold.By means of interactive authentication under the public key environment,the scheme adds the member authentication key so as to effectively prevent the collusion between key management center and signature server.The signer verifies whether the secret share distributed by management center is effective through the equation;the agent authorized share is generated by the original signer and the proxy signer together,and the single signature is produced by using the signer's private key and random numbers,and this effectively prevent denial.The safety analysis shows that the scheme has merits of resisting the joint strikes,strong unforgeability,threshold peculiarity and anonymity,and it can meet the due nature of threshold group-proxy signature.
  • 摘要：The spatial distribution pattern of sedimentary system and development characteristics of favorable reservoir of Paleogene in Qikou Sag of Bohai Bay Basin are discussed on the basis of continental sequence stratigraphy analysis and traditional sedimentology,so as to provide support for the second exploration and deployment of hydrocarbon in highly prospected area.It shows that the Paleogene slopes in Qikou Sag lay the foundation for the formation of lithological hydrocarbon reservoirs.In addition to the four provenances of uplift outside the basin,the bulges,such as Kongdian,Gangxi,in the basin are also important provenances of clastic sedimentary system.The slope area is rich in mud and sand;it has complete sedimentary-facies succession of Paleogene system,including well developed braided river delta,fan delta,offshore fan and lacustrine carbonate rocks in the lake,characteristic of coexistence of primary pores,secondary pores and micro-fractures in the medium-deep reservoir.The early oil and gas charging,secondary dissolution and the effect of the abnormal high pressure play an important role in the formation of high quality reservoirs.It reveals that the lower limit of exploration can reach down 5 km in the slope area.Many types of reservoirs match with Qibei bend slope,Banqiao slope and Chengbei fault slope and form the stratigraphic and lithologic traps,such as stratigraphic overlap traps,unconformity screened traps,upward tilting traps and so on.Exploration indicates that the Qibei slope,Chengbei fault slope have 100 million tons scale reserve and 10 million tons scale reserve area in Banqiao slope.As a faulted lacustrine basin,the slope is a favorable exploration area of stratigraphic and lithologic reservoirs.%應用陸相層序地層分析與傳統沉積學等方法,探討渤海灣盆地歧口凹陷古近系沉積體系的空間展布規律與有利儲集層發育特征,為高勘探程度區油氣二次勘探部署提供支撐.研究結果表明歧口凹陷古近系斜坡作為古地貌單元的主體,為大面積巖性油氣藏的形成奠定了地質基礎;除四大盆外隆起物源外,孔店、港西等盆內凸起也是碎屑沉積體系的重要物質來源,斜坡區既富泥也富砂;古近系相序完整,環湖規模性發育了辮狀河三角洲、扇三角洲、遠岸水下扇、湖泊碳酸鹽巖等相類型;中深層儲層具有原生、次生孔隙與微裂縫共存的特點,在異常高壓、早期油氣充注和次生溶解等作用下,中深層也發育優質儲層,斜坡區的勘探下限可達5km;多類儲集體與歧北撓曲斜坡、板橋斜坡、埕北斷坡等匹配形成地層超覆、不整合遮擋、上傾尖滅等地層-巖性圈閉帶.勘探結果發現了歧北斜坡、埕北斷坡億噸級儲量區,板橋斜坡形成了千萬噸級效益儲量區.斜坡區作為斷陷湖盆負向構造單元,是地層-巖性油氣藏有利的勘探領域.
  • 摘要：在礦床地質研究基礎上,通過對石英、螢石、方解石中流體包裹體巖相學、顯微測溫分析,對甘肅省干沙鄂博稀土礦床成礦流體的特征、演化及成礦機理進行了討論.結果表明:礦床中發育大量包裹體,按室溫下的成分相態特征,將其分為熔體包裹體、流體-熔體包裹體、氣液H2O包裹體、氣液CO2包裹體、CO2-H2O包裹體和含子礦物的氣液H2O包裹體、含子礦物的CO2-H2O包裹體等7種類型.在成礦過程中,包裹體組合從熔體包裹體→流體-熔體包裹體+流體包裹體→流體包裹體的變化,反映了成礦介質經歷了從巖漿→巖漿+熱液→熱液的演化過程.在巖漿-熱液成礦期,流體-熔體包裹體大量存在,以及富H2O相CO2-H2O包裹體與富cO2相CO2-H2O包裹體密切共生,表明成礦時曾經發生兩次不混溶作用,早期巖漿-熱液不混溶作用導致螢石和REE-氟碳酸鹽的晶出,而CO2-H2O不混溶作用引起了硫化物的沉淀.%The characteristics,evolution of the ore-forming medium and precipitation mechanism of the Ganshaebo REE deposit are studied based on geological investigation and petrography and research of micro-thermometry of fluid inclusions in quartz,fluorite and calcite.A large amount of inclusions have been found in the ore of the deposit and according to the characteristics of composition and phase behavior at room temperature,seven types of the inclusions have been recognized,including melt inclusions,fluid-melt inclusions,H2O inclusions,CO2 inclusions,CO2-H2O inclusions,daughterbearing H2O inclusions and daughter-bearing CO2-H2O inclusions.During the ore-forming process,the inclusion types change from melt inclusion into fluid-melt inclusion+ fluid inclusion,and then to fluid inclusion.It imply that the ore-forming medium varied from magma to magma+hydrothermal,and then to hydrothermal solution.Two types of immiscibility took place during the magmahydrothermal metallogenic period,the early magma-hydrothermal immiscibility is characterized by the occurrence of abundant fluid-melt inclusions,resulting in the precipitation of fluorite and REEfluorine carbonates,and the late CO2-H2O immiscibility is characterized by the coexistence of H2O-rich CO2-H2O inclusions and CO2-rich CO2-H2O inclusions,leading to the precipitation of sulfides.
  • 摘要：Single remote sensing datum is difficult to obtain both high spatial resolution and high spectral resolution characteristics at the same time in the field of remote sensing geology,so it is necessary to synthesize remote sensing data from different sources together to identify minerals and rocks.In this paper,lithological classification through the combination of multi-source remote sensing data of high spatial resolution of WorldView-2 data and high spectral resolution of Hyperion data is exercised in the identification of rocks and minerals and division of stratigraphy in the Wuqia County of Xinjiang.The basis of synergy is found and established by comparison of the detection ability of space and spectra between the two kinds of data source.Taking traditional source data fusion method as reference,the WorldView-2 multi-spectral data are sampled down to different spatial scale and the principal component is transformed.Then,synergy data are made by reconciling the first principal component and the Hyperion data.Based on the SAM method,the lithology in the study area is classified by using WorldView-2,Hyperion and synergy data.The experimental results show that the classification accuracy of all the synergy data are high,the Hyperion data comes next,and the accuracy of WorldView-2 data is the lowest.%在目前的技術條件下,一種遙感數據源很難同時具有高空間分辨率和高光譜分辨率特征,因此如何協同使用不同來源的遙感數據進行礦物巖石識別就成了遙感地質領域的重要研究內容之一.本文結合高空間分辨率WorldView-2數據和高光譜分辨率Hyperion數據,以新疆鳥恰縣礦物巖石識別與地層劃分為例探討多源遙感數據協同的巖性分類.通過對比2種數據源的空間和光譜探測能力,找到其協同基礎.借鑒傳統的同源數據融合方法,把WorldView-2多光譜數據降采樣到不同空間尺度,并進行主成分變換,采用第一主成分與Hyperion融合產生協同數據.基于SAM光譜角分類法,分別采用WorldView-2多光譜原始數據、Hyperion原始數據和各協同數據對研究區的巖性進行自動分類.結果表明,各協同數據巖性分類精度較高,Hyperion次之,WorldView-2數據巖性分類精度最低.
  • 摘要：首先定義了模糊關系方程的e極小解,然后給出了利用模糊神經網絡尋找max-min合成有限模糊關系方程的一個e極小解的算法,證明了算法的收斂性.最后把模糊關系方程的解應用于大學微格課程成績的評定,并用算例進行了說明.%A method of student grade evaluation of micro-class is introduced in this paper.Firstly,the ε-minimal solution of a fuzzy relational equation is defined.Secondly,an algorithm is introduced in order to find one ε-minimal solution from the fuzzy relational equation by using fuzzy neural network and then to determine its convergence.Finally,the solution of fuzzy relational equation is applied to the student grade evaluation and a numerical example is illustrated.
  • 摘要：Full 3D space-variant grid velocity body is established by modeling method for time to depth conversion.Firstly,the quality of the wellbore and the seismic velocity spectrum data is strictly controlled.Then optimum volume trend constraint method is applied to wellbore velocity interpolation and extrapolation.It shows that the method can integrate wellbore velocity and seismic velocity efficiently,which contains abundant horizontal and vertical velocity information.It makes the change trend of velocity body,structural shape,wellbore and internal well velocity more reasonable.Finally,the structural model in depth domain can more precisely reflect the change trend of underground structure,and improve the correlation of data after domain conversion.%通過建模的方法建立全三維空變網格速度體進行時深轉換.首先對井筒、地震速度譜數據進行嚴格質控;然后優選體趨勢約束方法將單井速度內插外推.結果表明該方法可以將井簡速度和地震速度譜高效地融合為一體,包含了豐富的橫向和縱向速度的變化信息,從而實現速度體與構造形態、井筒以及井間速度變化趨勢更加合理;最終使深度域構造模型更加真實地反映地下構造的變化趨勢,提高域轉換后數據的相關性.

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