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Genesis of Dolomite from Ma5^5-Ma5^10 Sub-members of the Ordovician Majiagou Formation in the Jingxi Area in the Ordos Basin

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Acta Geologica Sinica(English Edition) 2017年第4期91卷 1363-1379页

作者： liu Jingdong JIANG Youlu liu Xinshe YANG Zhiwei HOU Xiangdong ZHU Rongwei WEN Caixia {2. Feiyan school of geosciences China University of Petroleum Qingdao 266580 China State Key Laboratory of petroleum Resources and Prospecting China University of Petroleum Beijing 102249 China Research Institute of Exploration & Development Changqing Oilfield Company PetroChina Xi'an 710018 China marine Oil Production Plant Sinopec Shengli Oil field Dongying 257000 China Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Science Guangzhou 510301 China

We clarified three stages of dolomitization and secondary changes by studying the petrology and geochemistry characteristics of dolomite from the Ma5^5-Ma5^10 sub-members of the Ordovician Majiagou Formation in the Jingxi area in the Ordos Basin：（1） Syngenetic microbial dolomitization is characterized by formation of dolomite with a mainly micrite structure and horse tooth-shape dolomite cements. （2. Seepage reflux dolomitization during the penecontemporaneous period superposed adjustment functions such as recrystallization and stabilization in the middle-deep burial stage, forming dolomites mainly consisting of micro crystal and powder crystal structure. （3） Powder dolomite, fine dolomite, and medium-coarse crystalline dolomite formed in pores and fractures in the middle-deep burial stage. The secondary concussive transgression-regression under a regressive background is an important condition for the occurrence of many stages of dolomitization in the study area. The basin was an occlusive epicontinental sea environment in the Ma5 member of the Ordovician Majiagou Formation sedimentary period. In the sediments, sulfate content was high, which is conducive to the preservation of microbial activity and microbial dolomitization. Micritic dolomite formed by microbial dolomitization provides good migration pathways for seepage reflux dolomitization. Affected by evaporation seawater with increased Mg/Ca ratio, seepage reflux dolomitization was widely developed and formed large-scale dolomite, and underwater uplifts and slopes are favorable areas for dolomite. In the middle-deep burial stage, dolomitizing fluid in the stratum recrystallized or stabilized the previous dolomite and formed a small amount of euhedral dolomite in the pores and fractures.

关键词： Ordos Basin Ordovician genesis of dolomite microbial dolomitization seepage reflux dolomitization burial dolomitization

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Differential tectonic evolution and formation mechanism of three subsags in Wenchang Sag of Pearl River Mouth Basin,South china Sea

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petroleum Science 2023年第3期20卷 1379-1394页

作者： Qiu-Gen Zheng Jun-Liang Li Bao-Hua Lei Peng Song Qi Li De-Feng Shi hao liu Chang-Song Lin school of Ocean sciences China University of Geosciences(Beijing)Beijing100083China Hainan Branch of the china National Ofshore Oil Corporation HaikouHainan570311China Qingdao Institute of marine Geology QingdaoShandong266237China Laboratory for marine Mineral Resources Pilot National Laboratory for Marine Scence and Technoogy(Qingdao)QingdaoShandong26637China

Notable differences in the structural characteristics and evolution of three adjacent sub-sags,i.e.,the Wenchang sub-sags A,B,and C,on the downthrown side of the Zhu IlI South Fault in the Wenchang Sag,are significant as they affect the formation and distribution of the oil and gas in these three ***,the differences in their tectonic evolutions and formation mechanisms have not yet been adequately *** this paper,stress analysis,equilibrium profiles,and paleogeomorphic restora-tion,are used to investigate the dynamic settings,formation mechanisms,and influencing factors of the structural deformation related to the formation of the Wenchang Sag based on interpretation of seismic *** results of the stress analysis suggest clockwise deflection of the regional tensile stress direction from a WNW-ESE trend during the Early Paleocene to NW-SE and NNW-SSE trends during the Eocene,to a nearly N-S trend during the Oligocene,and finally to a NNE-SSW trend during the *** clockwise rotation of the regional tensile stress direction led to the formation of a dextral strike-slip stress component parallel to the NE-trending Zhu I South *** strike-slip stress component formed a releasing bend in sub-sag A,and may be associated with the continuous subsidence of a thick sedimentary layer in sub-sag *** also created a restraining bend in sub-sag B,which underwent multiple structural inversions during its extension and subsidence and has a relatively s mall sedimentary *** double restraining bend in sub-sag C is considered to have been strongly uplifted and eroded in response to this strike-slip stress *** obvious structural inversions in sub-sag B are iden-tified in this *** structural inversions correspond to the last four regional tectonic *** interpretation suggests that the formation of the structural inversions was likely related to the strong tensile stress and the small intersection angle between

关键词： Strike-slip stress Releasing bend Restraining bend Double restraining bend Structura linversion ZhuⅢSouthfault Wenchang sag Northern South china Sea

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Rare-earth element geochemistry reveals the provenance of sediments on the southwestern margin of the Challenger Deep

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Journal of Oceanology and Limnology 2019年第3期37卷 998-1009页

作者： JIANG Zuzhou SUN Zhilei liu Zhaoqing CAO Hong GENG Wei XU Haixia {2. Lisheng {2. Libo school of geosciences China University of PetroleumQingdao 266580China Laboratory for marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China Key Laboratory of marine Hydrocarbon Resources and Environmental Geology Ministry of Natural ResourcesQingdao Institute of Marine GeologyQingdao 266071China china Three Gorges New Energy Corp. Beijing 100053China Research Institute of petroleum Exploration & Development PetroChinaBeijing 100083China Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China

The hadal zone represents one of the last great frontiers in modern marine science,and deciphering the provenance of sediment that is supplied to these trench settings remains a largely unanswered ***,we examine the mineralogical and geochemical composition of a sediment core(core CD-1)that was recovered from the southwestern margin of the Challenger Deep within the Mariana *** element abundances and rare-earth element patterns from these sediments require inputs from both terrigenous dust and locally sourced volcanic *** exploit a two-endmember mixing model to demonstrate that locally sourced volcanic material dominates the sediment supply to the Challenger Deep(averaging^72.).The remainder,however,is supplied by aeolian dust(averaging^2.%),which is consistent with adjacent studies that utilized Sr-Nd isotopic *** on a growing database,we strengthen our understanding of Asian aeolian dust input into the northwestern Pacific,which ultimately improves our appreciation of sedimentation in,and around,the hadal zone.

关键词： Challenger Deep sediment rare-earth elements provenance Asian aeolian dust

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页岩储层非构造裂缝研究进展与思考

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地学前缘 2024年第1期31卷 297-314页

作者：丁文龙王垚王生晖刘霆锋张子游勾通张梦阳贺湘中国地质大学(北京)能源学院北京100083 中国地质大学(北京)海相储层演化与油气富集机理教育部重点实验室北京100083 中国地质大学(北京)自然资源部页岩气资源战略评价重点实验室北京100083

随着我国对非常规油气勘探理论的完善和技术的提高,页岩油气勘探开发不断获得突破,其战略地位也在不断上升。页岩储层的品质通常是制约其资源潜力的主要因素,其中裂缝是页岩油气富集、高产、稳产的关键。因此裂缝作为富有机质页岩储层... 详细信息

随着我国对非常规油气勘探理论的完善和技术的提高,页岩油气勘探开发不断获得突破,其战略地位也在不断上升。页岩储层的品质通常是制约其资源潜力的主要因素,其中裂缝是页岩油气富集、高产、稳产的关键。因此裂缝作为富有机质页岩储层重要的储集空间和渗流通道,其相关研究一直都是该领域内的重点。我国页岩储层内天然裂缝大量发育,而非构造裂缝同样比较发育,对页岩油气的富集和保存评价亦具有重要意义。目前对页岩储层构造裂缝的研究比较深入,而对页岩非构造裂缝的研究则相对薄弱。为此本文在充分调研近年来国内外页岩非构造裂缝研究成果的基础上,重点梳理了非构造裂缝的分类、识别与表征、主控因素、期次及演化序列等方面的研究进展。页岩储层非构造裂缝以成因和形态复杂、分布不规则、尺度较小为特征,依据成因机制差异可将其分为成岩缝、异常高压缝、层理缝和表生缝4个大类,它们的识别与表征目前主要还停留在定性描述的阶段;尽管不同类型的非构造缝主控因素存在差异,但均在不同程度上受控于沉积作用、成岩作用、矿物组分及含量、岩石力学性质,呈现出一定的共性。综合分析并指出了页岩储层非构造裂缝研究的关键问题及发展趋势:一是基于页岩储层岩心、薄片、成像测井、常规测井的典型特征,结合先进图像技术,建立不同类型不同尺度非构造裂缝综合有效识别与定量化表征新方法。二是针对页岩储层非构造裂缝的形成发育具有“多成因类型、多控制因素、多期次演化”的特点,并且页岩非构造裂缝的形成与演化与“古温压、古流体、古成岩”过程联系紧密。据此提出了利用页岩储层非构造裂缝中普遍存在的方解石等充填物的流体地球化学、同位素地球化学(C,O,Sr)及微区原位同位素年代学(U-Pb,Sm-Nd)等先进实验分析技术,综合确定页岩储层非构造裂缝形成时间和活动期次及演化序列是未来研究的关键手段。三是由页岩储层非构造裂缝发育程度与单因素主控因素之间的定性-半定量分析,向多个主控因素耦合控制下的非构造裂缝发育程度的定量研究方向发展,即采用数学方法确定不同主控因素对于裂缝发育程度影响的权重,并构建适合我国页岩非构造裂缝发育程度的综合指数与多个主控因素之间的定量关系模型。

关键词：页岩油气非构造裂缝裂缝分类主控因素裂缝发育程度裂缝期次

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Differential Characteristics of the Upper Ordovician-Lower Silurian Wufeng-Longmaxi Shale Reservoir and its Implications for Exploration and Development of Shale Gas in/around the Sichuan Basin

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Acta Geologica Sinica(English Edition) 2019年第3期93卷 520-535页

作者： wang Ruyue HU Zongquan LONG Shengxiang liu Guangxiang Z{2. Jianhua DONG Li DU Wei wang Pengwei YIN Shuai SINOPEC petroleum Exploration and Production Research Institute Beijing 100083China SINOPEC Key Laboratory of Shale Gas/Oil Exploration&Production Beijing 100083China State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development Beijing 100083China school of geosciences China University of Petroleum(East China)Qingdao 266580ShandongChina Shandong Provincial Key Laboratory of Depositional Mineralization&Sedimentary Minerals Shandong University of Science and TechnologyQingdao 266590ShandongChina

The Upper Ordovician Wufeng-Lower Silurian Longmaxi shale is widely distributed in the Sichuan Basin and its periphery,which is the key stratum for marine shale gas exploration and development(E&D)in *** on sedimentary environment,material basis,storage space,fracability and reservoir evolution data,the reservoir characteristics of the Wufeng-Longmaxi shale and their significance for shale gas E&D are systematically compared and analyzed in this *** results show that(1)the depocenter of the Wufeng(WF)-Longmaxi(LM)shale gradually migrates from east to *** high-quality shale reservoirs in the eastern Sichuan Basin are mainly siliceous shales,which are primarily distributed in the graptolite shale interval of *** high-quality reservoirs in the southern Sichuan Basin are mainly calcareous-siliceous and organic-rich argillaceous shales,which are distributed in the graptolite shale interval of WF2.LM7.(2.Deep shale gas(the burial depth>3500 m)in the Sichuan Basin has high-ultrahigh pressure and superior physical *** organic-rich siliceous,calcareous-siliceous and organic-rich argillaceous shales have suitable reservoir *** marginal area of the Sichuan Basin has a higher degree of pressure relief,which leads to the argillaceous and silty shales evolving into direct cap rocks with poor reservoir/good sealing capacity.(3)Combining shale gas exploration practices and impacts of lithofacies,depth,pressure coefficient and brittle-ductile transition on the reservoir properties,it is concluded that the favorable depth interval of the Wufeng-Longmaxi shale gas is 2.00~4000 m under current technical conditions.(4)Aiming at the differential reservoir properties of the Wufeng-Longmaxi shale in the Sichuan Basin and its periphery,several suggestions for future research directions and E&D of shale gas are formulated.

关键词： shale gas reservoir physical property fracability evolution Wufeng Formation Longmaxi Formation,Sichuan Basin

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Carboniferous and Permian integrative stratigraphy and timescale of North china Block

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Science china Earth sciences 2022年第6期65卷 983-1011页

作者： Boheng SHEN Shuzhong SHEN Qiong WU Shuichang ZHANG Bin ZHANG Xiangdong wang Zhangshuai HOU Dongxun YUAN Yichun ZHANG Feng liu Jun liu Hua ZHANG Yukun SHI Jun wang Zhuo FENG State Key Laboratory for Mineral Deposits Research School of Earth Sciences and Engineering and Frontiers Science Center for Critical Earth Material CyclingNanjing UniversityNanjing 210023China Research Institute of petroleum Exploration and Development PetroChinaBeijing 100083China school of Resources and geosciences China University of Mining and TechnologyXuzhou 221116China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and PaleoenvironmentChinese Academy of SciencesNanjing 210008China Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of sciences Institute of Vertebrate Paleontology and Paleoanthropology and Center for Excellence in Life and PaleoenvironmentChinese Academy of SciencesBeijing 100044China Institute of Palaeontology Yunnan UniversityKunming 650500China

The Carboniferous-Permian strata in the North china Block(NCB) contain abundant fossils, coals and natural *** a high-resolution timescale for the Carboniferous and Permian in the NCB is essential to understand the geologic events and explore the spatial and temporal distributions of the natural resources. The upper Carboniferous and the basal part of Permian are relatively well correlated because they yield marine conodont and fusuline fossils. However, the Permian terrestrial strata mostly rely on poorly constrained palynostratigraphy and phytostratigraphy and are short of the precise geochronologic constraints on the correlation with the marine strata. This study provides a critical review on the state-of-the-art of the latest Carboniferous and Permian chronostratigraphic and biostratigraphic frameworks and stratigraphic correlation in the NCB. The Penchi Formation ranges from lower Bashkirian to lower Gzhelian;the Taiyuan Formation is assigned to the upper Gzhelian to lower Asselian;the Shansi and Lower Shihhotse formations are from middle Asselian to lower Sakmarian;the Upper Shihhotse Formation is assigned to upper Artinskian to lower Kungurian, and the Sunjiagou Formation was assigned to Lopingian, respectively. A long hiatus up to ~2. Myr between the Upper Shihhotse and Sunjiagou formations, mainly marked by a large-scale erosional surface at the base of a coarse conglomeratic sandstone unit and/or multiple paleosol layers as well as significant differences of floras between these two lithostratigraphic units, is present probably due to tectonic uplift in association with the closure of the Paleo Asian Ocean(PAO) during the Cisuralian and Guadalupian. The possible amplitude of sea-level changes from Carboniferous to Permian on the NCB is estimated from 0 to 40 *** floral succession, depositional records and organic carbon isotope profiles suggest that the latest Carboniferous and earliest Permian was a favorable period for coal accumulation

关键词： North china Block Carboniferous-Permian Geochronology Biostratigraphy Correlation

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生物聚合物对甲烷水合物动力学抑制作用研究

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非常规油气 2024年第1期11卷 136-142页

作者：王金堂李健平邵子桦廖波姜海洋王韧薛海杰闫浩中国石油大学(华东)石油工程学院山东青岛266580 中国石油集团工程技术研究院有限公司北京102206

为保障海域天然气水合物安全高效钻井,针对常用的动力学抑制剂成本高、污染大的缺点,开展了可降解生物聚合物抑制剂对水合物的生成、分解抑制和防聚结效果实验研究。结果表明:1)羧甲基壳聚糖、黄原胶和果胶和壳聚糖盐酸盐对水合物的生... 详细信息

为保障海域天然气水合物安全高效钻井,针对常用的动力学抑制剂成本高、污染大的缺点,开展了可降解生物聚合物抑制剂对水合物的生成、分解抑制和防聚结效果实验研究。结果表明:1)羧甲基壳聚糖、黄原胶和果胶和壳聚糖盐酸盐对水合物的生成具有明显的动力学抑制作用,其中壳聚糖盐酸盐对水合物的抑制作用最强,可延长水合物诱导时间至40 min;2.羧甲基壳聚糖、黄原胶和果胶、壳聚糖盐酸盐、壳聚糖季铵盐对水合物分解具有抑制作用;3)相比于纯水,羧甲基壳聚糖和果胶的扭矩峰值更低,且无明显的聚结现象,可以作为无油体系防聚剂;4)羧甲基壳聚糖、黄原胶、果胶具有很好的耐低温性,可以在2.5%的盐浓度下将滤失量控制在15 ml内。以上成果认识可为海域水合物动力学抑制剂的合理选择提供借鉴。

关键词：天然气水合物生物聚合物动力学抑制剂防聚剂低温流变性抗盐性

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四川盆地涪陵南地区奥陶系五峰组—志留系龙马溪组页岩古构造应力场及裂缝特征

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岩性油气藏 2024年第1期36卷 14-22页

作者：包汉勇刘超甘玉青薛萌刘世强曾联波马诗杰罗良中国石化江汉油田分公司勘探开发研究院武汉430223 中国石油大学(北京)地球科学学院北京102249 北京大学能源研究院北京100871

通过岩石力学实验、声发射实验和地震资料综合解释,利用有限元数值模拟方法,对涪陵南地区奥陶系五峰组—志留系龙马溪组海相页岩古构造应力场进行了数值模拟,并结合岩心实测结果,预测了构造裂缝的发育特征。研究结果表明:①涪陵南地区... 详细信息

通过岩石力学实验、声发射实验和地震资料综合解释,利用有限元数值模拟方法,对涪陵南地区奥陶系五峰组—志留系龙马溪组海相页岩古构造应力场进行了数值模拟,并结合岩心实测结果,预测了构造裂缝的发育特征。研究结果表明:①涪陵南地区裂缝主要形成期(燕山晚期)构造应力和裂缝的分布受断层、岩石力学性质和构造应力的影响,断层广泛发育的区域容易出现应力集中,并引起较大的应力梯度。②利用库伦-莫尔破裂准则预测了研究区构造裂缝的发育,同时引入剪切破裂指数R定量表征裂缝发育的强度,其值越大反映裂缝发育程度越高。窄陡断背斜和断层附近裂缝发育,以高角度剪切裂缝为主,而在宽缓向斜部位裂缝发育程度最弱,研究区五峰组—龙马溪组底部硅质页岩应力集中,裂缝最发育。③涪陵南地区海相页岩气保存有利区主要为3个区带:远离大断层的凤来向斜内部,主要构造变形期未遭受大的破坏作用,其位于应力低值区,具有良好的保存条件,为Ⅰ类有利区;白马向斜内部小断层发育,应力值位于中等水平,保存条件中等,为Ⅱ类较有利区;石门—金坪断背斜遭受到强烈改造作用,容易产生大规模剪切裂缝,破坏了保存条件,为Ⅲ类不利区。

关键词：薄板模型岩石力学参数有限元数值模拟构造应力场剪切裂缝库伦-莫尔破裂准则破裂指数海相页岩五峰组—龙马溪组涪陵南地区四川盆地

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Facial Features of an Air Gun Array Wavelet in the Time-Frequency Domain Based on marine Vertical Cables

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Journal of Ocean university of china 2021年第6期20卷 1371-1382页

作者： ZHANG Dong liu Huaishan XING Lei WEI Jia wang Jianhua ZHOU Heng GE Xinmin Key Laboratory of Submarine geosciences and Prospecting Techniques Ministry of EducationCollege of Marine GeosciencesOcean University of ChinaQingdao 266100China Qingdao Institute of marine Geology China Geological SurveyMinistry of Natural ResourcesQingdao 266071China Evaluation and Detection Technology Laboratory of marine Mineral Resources Qingdao National Laboratory for Marine Scienceand TechnologyQingdao 266071China National Engineering Laboratory of Offshore Oil Exploration CNOOC Research InstituteBeijing 100028China BGP International CNPCZhuozhou 072750China school of geosciences China University of Petroleum(East China)Qingdao 266580China

Air gun arrays are often used in marine energy exploration and marine geological *** study of the single bubble dynamics and multibubbles produced by air guns interacting with each other is helpful in understanding pressure *** used the van der Waals air gun model to simulate the wavelets of a sleeve gun of various offsets and arrival *** factors were taken into account,such as heat transfer,the thermodynamically open quasi-static system,the vertical rise of the bubble,and air gun post *** vertical cables are located on the seafloor,but hydrophones are located in seawater and are far away from the air gun array *** situation conforms to the acquisition conditions of the air gun far-field wavelet and thus avoids the problems of ship noise,ocean surges,and ***-quality 3D wavelet data of air gun arrays were collected during a vertical cable test in the South{2. Sea in *** proposed an evaluation method of multidimensional facial features,including zeropeak amplitude,peak-peak amplitude,bubble period,primary-to-bubble ratio,frequency spectrum,instantaneous amplitude,instantaneous phase,and instantaneous frequency,to characterize the 3D air gun wave *** match between the facial features in the field and simulated data provides confidence for the use of the van der Waals air gun model to predict air gun wavelet and facial features to evaluate air gun array.

关键词： air gun van der Waals marine vertical cable facial features multidimensional

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深水源—汇系统对多尺度气候变化的过程响应与反馈机制

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沉积学报 2021年第1期39卷 231-252页

作者：龚承林齐昆徐杰刘喜停王英民油气资源与探测国家重点实验室中国石油大学(北京)北京102249 中国石油大学(北京)地球科学学院北京102249 中国地质大学(北京)海洋学院北京100083 中国海洋大学海洋地球科学学院山东青岛266100

源—汇系统对多尺度气候变化的响应与反馈是当前深水沉积学研究的前缘和新动向。通过梳理外陆架—深水盆地沉积物搬运分散系统(深水源—汇系统)对从构造尺度到人类尺度气候变化的过程响应,揭示了两种(迟滞和瞬态)深水源—汇系统的过程... 详细信息

源—汇系统对多尺度气候变化的响应与反馈是当前深水沉积学研究的前缘和新动向。通过梳理外陆架—深水盆地沉积物搬运分散系统(深水源—汇系统)对从构造尺度到人类尺度气候变化的过程响应,揭示了两种(迟滞和瞬态)深水源—汇系统的过程响应与反馈机制。迟滞响应深水源—汇系统的过渡区较宽、响应尺度较大(Teq≥104年),有利形成条件为:宽陆架且无峡谷延伸到内陆架以及冰室气候;其沉积物搬运分散过程主要受到可容空间的驱动(吻合经典的Exxon层序地层学理论)。在迟滞响应深水源—汇系统中,构造—轨道尺度的冰室气候期浊流活动较强、形成的沉积体相对富砂,温室气候期浊流活动较弱、形成的沉积响应相对富泥;而亚轨道—人类尺度的气候波动常被快速海平面上升所“淹没”、不能调控深水沉积物搬运分散过程。瞬态响应源—汇系统过渡区较局限、响应尺度较小(Teq≤104年),有利形成条件有:窄陆架、温室气候、峡谷头部和河口相接或相邻、断陷湖盆以及三角洲越过陆架坡折,其沉积物搬运分散过程对物源供给更为敏感,主要受物源供给驱动(偏离经典的Exxon层序地层学理论)。在瞬态响应深水源—汇系统中,不论是构造—轨道尺度的气候变化还是亚轨道—人类尺度的气候波动,只要其能够诱发物源供给的变化(而不论可容空间是上升还是下降),都能够对深水源—汇过程响应进行调控。

关键词：深水沉积气候变化层序地层学迟滞响应源—汇系统瞬态响应源—汇系统

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