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Occurrence Characteristics of Saline-Lacustrine Shale-Oil in the Qianjiang Depression,Jianghan Basin,Central China

Journal of Earth Science 2022年第4期33卷 945-962页

作者： Zhongliang Sun Zhiliang He Furong Wang yuanjia han Sheng He Yuguang Hou Jing Luo Youheng Zheng Shiqiang Wu Wuxi Research Institute of Petroleum Geology Petroleum Exploration and Production Research InstituteSINOPECWuxi 214126China State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development Beijing 100083China Department of Science and Technology China Petroleum and Chemical CorporationBeijing 100728China Key Laboratory of Tectonics and Petroleum Resources China University of GeosciencesWuhan 430074China Research Institute of Petroleum Exploration and Development Jianghan Oilfield Branch CompanySINOPECWuhan 430223China

The amount of shale oil and its characterization are key issues in the study of shale oil.At present,many scholars use a variety of methods to evaluate the amount of shale oil,and use the calculated amount of hydrocarbons to analyze its influencing factors;however,there is lack of detailed research on the storage space for shale-oil and it’s influencing factors.In view of this issue,gas chromatography(GC),gas chromatography-mass spectrometry(GC-MS),soxhlet extraction(SE),fieldemission scanning electron microscopy(FE-SEM),low-temperature nitrogen adsorption(LTNA),highpressure mercury intrusion(HPMI),and X-ray diffraction(XRD)were used to analyze and compare samples from two wells located in different deposition locations.The unconventional Well BYY2 and BX7 s were drilled in the depocenter and distal area of the Qianjiang Formation,respectively.Controlled by differences in the organic matter type and sedimentary environment,the organic matter in Well BYY2,which was found to be characterized by laminar shale,mainly originated from aquatic algae.The results showed that as the total organic carbon(TOC)content increased,the amount of shaleoil in the pores increased.Shale-oil was mostly stored in mesopores and macropores that had been preserved by dolomite minerals of a biogenic origin and also occurred in pores sized 5–200 nm and>1μm.Dolomite minerals of a biogenic origin and clay minerals contributed to the occurrence of shaleoil.In comparison,the organic matter in Well BX7 has been greatly influenced by terrestrial organic matter.Pores in the massive mudstones from Well BX7 were determined to be mainly mesopores preserved by clay minerals and quartz,and the shale-oil was mostly stored within the pores of<40 nm.When the TOC content was~2.5 wt.%,the generated shale-oil reached saturation.Clay minerals contributed to the occurrence of shale-oil,whereas quartz only contributed to the occurrence of shale-oil in macropores.

关键词： shale oil reservoir storage space of shale oil saline lacustrine Jianghan Basin

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Quantitative Estimation on Methane Storage Capacity of Organic-Rich Shales from the Lower Silurian Longmaxi Formation in the Eastern Sichuan Basin, China

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Journal of Earth Science 2023年第6期34卷 1851-1860页

作者： Xiaowen Guo Tao Luo Tian Dong Rui Yang yuanjia han Jizheng Yi Sheng He Zhiguo Shu hanyong Bao Key Laboratory of Tectonics and Petroleum Resources Ministry of EducationChina University of GeosciencesWuhan 430074China Jianghan Oilfield Branch Company SINOPECWuhan 430223China

The assessment of gas storage capacity is crucial to furthering shale gas exploration and development in the eastern Sichuan Basin,China.Eleven organic-rich shale samples were selected to carry out the high pressure methane sorption,low-pressure N_(2)/CO_(2) gas adsorption,and bulk and skeletal density measurements to investigate the methane storage capacity(MSC).Based on the relative content of clay,carbonates,quartz+feldspar,we grouped the 11 samples into three lithofacies:silica-rich argillaceous shale(CM-1),argillaceous/siliceous mixed shale(M-2),and clay-rich siliceous shale(S-3).The total porosity of the shale samples varies from 3.4% to 5.6%,and gas saturation ranges from 47% to 89%.The measured total gas amount ranges from 1.84 mg/g to 4.22 mg/g with the ratio of free gas to total gas amount ranging from 52.7% to 70.8%.Free gas with high content in the eastern Sichuan Basin may be the key factor controlling amount of shale gas production.The TOC content critically controls the MSC of shales,because micropore,mesopore volumes and the specific surface areas associated with organic matter provide the storage sites for the free and adsorbed gas.The methane sorption capacities of samples from different lithofacies are also affected by clay minerals and moisture content.Clay minerals can provide additional surface areas for methane sorption,and water can cause a 7.1%-42.8% loss of methane sorption capacity.The total porosity,gas-bearing porosity,water saturation,free gas and adsorbed gas number of samples from different lithofacies show subtle differences if the shale samples had similar TOC contents.Our results suggest that,in the eastern Sichuan Basin,clay-rich shale lithofacies is also prospecting targets for shale gas production.

关键词： methane shale gas Longmaxi Formation Sichuan Basin

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Identification of sweet spots in shale-type and siltstone-type“shale oil systems”:A case study of the Chang 7 Member in Ordos Basin

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Science China Earth Sciences 2023年第7期66卷 1647-1663页

作者： Songqi PAN Qiulei GUO Caineng ZOU Zhenhua JING Ming YUAN Ying HE He ZHENG Ying MU Zhi YANG Shixiang LI Xinping ZHOU Songtao WU hanlin LIU Feng YANG yuanjia han Research Institute of Petroleum Exploration and Development PetroChinaBeijing 100083China State Key Laboratory of Enhanced Oil Recovery Beijing 100083China School of Earth Resources China University of GeosciencesWuhan 430074China Institute of Porous Flow and Fluid University of Chinese Academy of SciencesBeijing 100049China Changqing Oilfield Company PetroChinaXi’an 710018China

Mid-high maturity shale oil is the most realistic field for the scale breakthrough of terrestrial shale oil production in China.Generally,three deficiencies hinder shale oil development in China:heavy oil density,small sweet spot areas,and poor distribution continuity.Thus,identifying the“sweet spots”in shale oil reservoirs is critical for the efficient exploration and development of terrestrial shale oil.This study targets the siltstone type(Class-Ⅱshale oil)and pure shale type(Class-Ⅲshale oil)of the Chang 7 Member in the Ordos Basin,and identifies three stratigraphic units,namely the hydrocarbon accumulation unit,hydrocarbon generation unit,and hydrocarbon retention unit,which together constitute the in-source“shale oil system”.The hydrocarbon accumulation unit is mainly siltstone,where the hydrocarbons are migrated from shales.It has favorable porethroat network connectivity with a pore connectivity ratio of 32–57%,being the siltstone-type sweet spots.The hydrocarbon generation unit is mainly composed of high-TOC mudstone/shale and is the main contributor to in-source hydrocarbon generation and expulsion.This unit has high three-dimensional connectivity(28–30%),as shown by the pore-throat network model,associated with vertical paths for hydrocarbon expulsion.The hydrocarbon retention unit is mainly composed of low-TOC mudstone/shale retaining self-generated and migrated hydrocarbons.The pore connectivity rate is 17–42%,and the pore-throat network connectivity direction is uneven.Light and low-carbon-number hydrocarbons are preferentially trapped or even sealed in small pores of the retention unit,forming the typical mudstone/shale-type sweet spots.In the process called shale oil intrasource migration,the oil migrates in source rocks causing component fractionation,which allows more shale oil to enrich in the hydrocarbon accumulation and retention units to form sweet spots,compared with the hydrocarbon generation unit.The migration paths include the one from mudstone/shale to siltstone interlayers and that fro

关键词： Shale oil system Hydrocarbon accumulation unit Hydrocarbon generation unit Hydrocarbon retention unit Differentiated enrichment Sweet spots window Pore-throat network Throat direction

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Effect of Organic Matter Type and Maturity on Organic Matter Pore Formation of Transitional Facies Shales: A Case Study on Upper Permian Longtan and Dalong Shales in Middle Yangtze Region, China

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Journal of Earth Science 2020年第2期31卷 368-384页

作者： Zhongrui Wu Sheng He yuanjia han Gangyi Zhai Xipeng He Zhi Zhou Key Laboratory of Tectonics and Petroleum Resources Ministry of EducationChina University of GeosciencesWuhan 430074China Oil&Gas Survey Center China Geological SurveyBeijing 100029China Research Institute of Exploration and Development of East China Branch of SINOPEC Nanjing 210011China

Organic matter(OM)nanopores developed in transitional facies shales,i.e.,the Upper Permian Longtan and Dalong Formations in the Yangtze Platform,China,were investigated to determine the corre-sponding influence of thermal maturity and OM types within the geological conditions.A suite of 16 core samples were taken from Type-Ⅲ Longtan shales and Type-Ⅱ Dalong shales from two wells covering a ma-turity(Ro,vitrinite reflectance)ranging from 1.22%to 1.43%and 2.62%to 2.97%,respectively.Integrated analysis of the shale samples was carried out,including field-emission scanning electron microscopy(FESEM),low-pressure N2 and CO2 adsorption,high-pressure CH4 adsorption,and mercury intrusion capillary pressure(MICP)analysis.The fluid inclusions of liquid and gas hydrocarbons trapped in calcite vein samples in Dalong shales of two wells were studied using laser Raman and fluorescence spectroscopy.FE-SEM images indicated that OM pores in different formations varied substantially in terms of shape,size,and distribution density.OM pores in Type-Ⅱ Dalong shales of Well XY1 were mainly micropore,sparsely distributed in the gas-prone kerogen with a spot-like and irregular shape,while bitumen rarely developed observable pores.In contrast,the morphology of OM pores in Type-Ⅲ Longtan shales were significantly different,which was due to differences in the OM type.The primary OM pores in some terrestrial woody debris in Longtan shales had a relatively larger pore diameter,ranging from hundreds of nanometers to a few micrometers and were al-most all rounded in shape,which might be one of the factors contributing to larger pore volume and gas adsorption capacity than Dalong shales of Well XY1.Comparing Dalong shales of Well XY1 with relatively lower thermal maturity,there were abundant spongy-like pores,densely developed in the pyrobitumen in Type-Ⅱ Dalong shales of Well EY1,with an irregular shape and diameter ranging from several to hundreds of nanometers.Many blue fluorescent oil inclusions and a small number of CH4 inclusions mixed wi

关键词： Middle Yangtze area Permian transitional facies shales pore structure thermal maturity organic matter type organic matter pore petroleum geology

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China's landscape in oncology drug research:perspectives from research collaboration networks

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Chinese Journal of Cancer Research 2015年第2期27卷 138-147页

作者： han You Jingyun Ni Michael Barber Thomas Scherngell yuanjia Hu State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of Macao Innovation Systems Department AIT Austrian Institute of Technology

Objective： Better understanding of China＇s landscape in oncology drug research is of great significance for discovering anti-cancer drugs in future. This article differs from previous studies by focusing on Chinese oncology drug research communities in co-publication networks at the institutional level. Moreover, this research aims to explore structures and behaviors of relevant research units by thematic community analysis and to address policy recommendations. Methods： This research used social network analysis to define an institutions network and to identify a community network which is characterized by thematic content. Results： A total of 675 sample articles from 2008 through 2012 were retrieved from the Science Citation Index Expanded （SCIE） database of Web of Science, and top institutions and institutional pairs are highlighted for further discussion. Meanwhile, this study revealed that institutions based in the Chinese mainland are located in a relatively central position, Taiwan＇s institutions are closely assembled on the side, and Hong Kong＇s units located in the middle of the Chinese mainland＇s and Taiwan＇s. Spatial division and institutional hierarchy are still critical barriers to research collaboration in the field of anti-cancer drugs in China. In addition, the communities focusing on hot research areas show the higher nodal degree, whereas communities giving more attention to rare research subjects are relatively marginalized to the periphery of network. Conclusions= This paper offers policy recommendations to accelerate cross-regional cooperation, such as through developing information technology and increasing investment. The brokers should focus more on outreach to other institutions. Finally, participation in topics of common interest is conducive to improved efficiency in research and development （R＆D） resource allocation.

关键词： Anti-cancer pharmaceuticals publications research collaboration networks thematic analysis

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潜江凹陷盐间页岩油储层孔隙结构分形表征与评价

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地质科技通报 2022年第4期41卷 125-137页

作者：孙中良王芙蓉韩元佳侯宇光何生郑有恒吴世强中国石油化工股份有限公司无锡石油地质研究所江苏无锡214126 中国石油化工股份有限公司页岩油气富集机理与有效开发国家重点实验室江苏无锡214126 中国石油化工股份有限公司国家能源页岩油研发中心江苏无锡214126 中国石油化工股份有限公司中国石化油气成藏重点实验室江苏无锡214126 中国地质大学(武汉)构造与油气资源教育部重点实验室武汉430074 中国石化江汉油田分公司勘探开发研究院武汉430223

目前,众多学者从地球化学特征、储层物性特征等方面对潜江凹陷潜江组页岩展开了较多研究,并取得了一定的进展,但对其孔隙的复杂性、形成孔喉的主要矿物及其影响因素的分析存在盲点。依据分形理论,结合氮气吸附实验、高压压汞实验,选取... 详细信息

目前,众多学者从地球化学特征、储层物性特征等方面对潜江凹陷潜江组页岩展开了较多研究,并取得了一定的进展,但对其孔隙的复杂性、形成孔喉的主要矿物及其影响因素的分析存在盲点。依据分形理论,结合氮气吸附实验、高压压汞实验,选取沉积位置不同的BX7井以及BYY2井,分别对潜三段第四亚段(Eq_(3)^(4)-10)页岩的比表面分形特征、孔隙结构分形特征以及孔喉分形特征进行了评价,分析了其影响因素。结果表明,该地区的孔隙表面较为平整,比表面分形维数D1趋近于2,孔隙表面的粗糙程度主要受黏土矿物本身特性影响。相较于沉积边缘的BX7井,位于沉积中心的BYY2井储层孔隙结构分形特征更为简单。小孔径孔隙的孔体积所占比例越大,孔隙结构分形特征越复杂。BX7井储层孔隙结构分形维数D2主要受黏土矿物以及石英的影响,而BYY2井储层孔隙结构分形维数D2主要受白云石的影响。白云石为构成BX7井储层孔喉的主要矿物,随白云石增加,孔喉特征复杂,连通性变差。BYY2井储层中石英形成的孔喉直径较小,石英的增加会使孔隙连通性变差;方解石形成的孔喉直径较大。页岩油的赋存会使孔隙的分形维数变小,对孔喉分形特征的影响较小。盐类矿物的存在会阻塞孔隙,使孔隙连通性变差。

关键词：分形特征页岩储层潜江组潜江凹陷

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渤海湾盆地枣园油田古近系孔店组沸石矿物的岩浆热液成因

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石油勘探与开发 2021年第5期48卷 950-961页

作者：韩国猛王丽肖敦清楼达徐牧月赵勇刚裴眼路郭小文滕建成韩元佳中国石油大港油田公司勘探开发研究院天津300280 中国地质大学(武汉)构造与油气资源教育部重点实验室武汉430074 中国地质大学(武汉)地球科学学院武汉430074

通过普通薄片、电子探针、包裹体测温、激光拉曼光谱、激光剥蚀电感耦合等离子体质谱等技术分析手段,对渤海湾盆地枣园油田Z56井古近系孔店组二段(简称孔二段)热液流体活动进行识别,并探讨岩浆热液流体与孔二段沸石矿物的成因联系。实... 详细信息

通过普通薄片、电子探针、包裹体测温、激光拉曼光谱、激光剥蚀电感耦合等离子体质谱等技术分析手段,对渤海湾盆地枣园油田Z56井古近系孔店组二段(简称孔二段)热液流体活动进行识别,并探讨岩浆热液流体与孔二段沸石矿物的成因联系。实验发现:(1)泥岩裂缝内可见焦沥青与绿泥石、重晶石、黄铜矿、黄铁矿、钠沸石、方沸石等热液特征矿物共生;(2)焦沥青激光拉曼光谱的分峰拟合计算温度为324~354℃,绿泥石地质温度计指示温度为124~166℃,钠沸石原生包裹体均一温度为89~196℃,反映了岩浆热液流体的温度变化较大,但是都高于正常地温;(3)绿泥石和重晶石的铕正异常明显,钠沸石的稀土元素配分曲线与孔店组玄武岩相似,指示其来源于岩浆热液流体。同时,钻井资料显示,Z56井孔二段发育多套玄武岩夹层,具备岩浆热液活动的地质基础。因此,岩浆热液流体与孔二段泥岩之间的水-岩相互作用可能是导致研究区孔二段泥岩富含沸石矿物的原因之一。图9表3参48。

关键词：古近系孔店组岩浆热液流体沸石枣园油田沧东凹陷黄骅坳陷渤海湾盆地

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黄陵背斜南翼牛蹄塘组二段页岩岩心裂缝脉体成岩环境演化与页岩气保存

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地球科学 2019年第11期44卷 3583-3597页

作者：刘力何生翟刚毅陈科刘早学王亿韩元佳董田中国地质大学构造与油气资源教育部重点实验室湖北武汉430074 中国地质调查局油气资源调查中心北京100029 湖北省地质调查院湖北武汉430034

岩心观察鄂西黄陵背斜南翼下寒武统牛蹄塘组二段黑色页岩中发育构造挤压成因的高角度裂缝和顺层裂缝.选取不同产状的典型裂缝脉体样品,薄片镜下观察发现高角度裂缝中充填方解石脉,顺层裂缝中充填方解石-白云石复合脉.通过阴极发光、流... 详细信息

岩心观察鄂西黄陵背斜南翼下寒武统牛蹄塘组二段黑色页岩中发育构造挤压成因的高角度裂缝和顺层裂缝.选取不同产状的典型裂缝脉体样品,薄片镜下观察发现高角度裂缝中充填方解石脉,顺层裂缝中充填方解石-白云石复合脉.通过阴极发光、流体包裹体分析以及微区原位元素测定,开展了裂缝脉体成岩环境演化研究,分析了不同产状裂缝对页岩气层局部封闭性的影响.阴极发光结果表明,高角度方解石脉和顺层方解石-白云石复合脉均为2期流体活动形成.根据流体包裹体分析,高角度方解石脉早期成脉流体主要为变质较深的地层卤水,晚期成脉流体混入了低矿化度流体,而顺层方解石-白云石复合脉2期成脉流体均未受低矿化度流体的改造.利用不同阴极发光的裂缝脉体碳酸盐矿物的微区原位微量元素测定结果,对铁锰含量、稀土元素(REE)和氧化还原判别参数分析显示,高角度方解石脉成岩环境经历了由还原环境向氧化环境转化,而顺层方解石-白云石复合脉的成岩环境长期保持了较为还原的环境.因此认为,高角度裂缝对页岩气层的局部封闭条件可能产生破坏作用,从而造成页岩气一定程度的散失,而顺层裂缝对局部封闭条件的破坏作用相对有限,裂缝发育特征及其经历的成岩演化过程研究可为页岩气层自封闭和页岩气微观保存条件的评价提供依据.

关键词：黄陵背斜南翼牛蹄塘组二段裂缝脉体流体包裹体脉体成岩环境演化页岩气保存油气地质

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鄂西黄陵背斜南翼下寒武统水井沱组页岩孔隙结构与吸附能力

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石油学报 2020年第1期41卷 27-42页

作者：何晶何生刘早学翟刚毅王亿韩元佳万阔魏思乐中国地质大学(武汉)构造与油气资源教育部重点实验室湖北武汉430074 湖北省地质调查院湖北武汉430030 中国地质调查局油气资源调查中心北京100029

以鄂西黄陵背斜南翼秭地2井下寒武统水井沱组海相富有机质页岩为研究对象,在水井沱组一段和二段选取代表性页岩样品,利用CO2和N2物理吸附、高压压汞、氩离子抛光-场发射扫描电镜(FE-SEM)等多尺度孔隙结构测试技术和观察手段以及有机质... 详细信息

以鄂西黄陵背斜南翼秭地2井下寒武统水井沱组海相富有机质页岩为研究对象,在水井沱组一段和二段选取代表性页岩样品,利用CO2和N2物理吸附、高压压汞、氩离子抛光-场发射扫描电镜(FE-SEM)等多尺度孔隙结构测试技术和观察手段以及有机质孔统计分析方法,结合甲烷等温吸附实验以及其他测试手段,描述了页岩地球化学、矿物组成和岩相特征,研究了页岩孔隙类型、孔隙形态、孔径分布和比表面积等孔隙结构参数,分析了页岩甲烷吸附能力,讨论了页岩孔隙发育和孔隙结构的影响因素。研究表明:秭地2井水井沱组一段和二段富有机质黑色页岩成熟度Ro约为2.5%,页岩岩相主要有硅质页岩、混合质页岩和黏土质页岩;页岩有机质孔隙形状多样、边界不规则,孔径偏小,大多孔径5nm的介孔+宏孔中的无机质孔隙占优势;页岩比表面积大、对甲烷的吸附能力强;硅质页岩的孔隙结构和吸附能力相对较好;页岩有机碳含量、碳酸盐矿物和黏土矿物含量以及页岩岩相等因素对页岩孔隙发育和孔隙结构有重要影响。

关键词：黄陵背斜南翼宜昌斜坡带水井沱组海相页岩孔隙结构吸附能力

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东营凹陷超压顶封层及其附近砂岩中碳酸盐胶结物的成因

引用

石油学报 2012年第3期33卷 385-393页

作者：韩元佳何生宋国奇王永诗郝雪峰王冰洁罗胜元中国地质大学构造与油气资源教育部重点实验室湖北武汉430074 中国石化胜利油田公司山东东营257015

东营凹陷超压顶界面埋深2 200～2 800 m,在深部超压流体影响下,超压顶封层及其附近砂岩中碳酸盐矿化作用发育,碳酸盐含量一般在15%～40%。对53块砂岩样品共101个碳酸盐胶结物原位微区电子探针成分数据进行数理统计后发现,碳酸盐矿物主... 详细信息

东营凹陷超压顶界面埋深2 200～2 800 m,在深部超压流体影响下,超压顶封层及其附近砂岩中碳酸盐矿化作用发育,碳酸盐含量一般在15%～40%。对53块砂岩样品共101个碳酸盐胶结物原位微区电子探针成分数据进行数理统计后发现,碳酸盐矿物主要可分为准同生白云石、方解石与铁白云石3种类型,综合X-衍射、阴极发光等判断其成岩序列为准同生白云石→方解石→铁白云石。根据碳酸盐胶结物成岩流体包裹体观测结果,超压顶封层及其附近砂岩中碳酸盐胶结物的沉淀伴随着超压流体环境,最小古压力系数为1.29～1.62,且沉淀温度明显高于背景温度值,指示与超压热流体侵入有关。结合前人研究成果认为,方解石、铁白云石胶结物的沉淀可能分别与东营组沉积末期、明化镇组沉积以来的超压流体活动有关;同时利用氧同位素地质温度计对上述认识进行了检验,其结果与实际观测值也较为吻合。方解石胶结物的沉淀温度90～120℃,其超压流体的δ18 OSMOW值为零,方解石胶结物的δ18 OPDB值为-16.86‰～-12.29‰;铁白云石胶结物的沉淀温度约110～135℃,其超压流体的δ18 OSMOW值为0.25‰,铁白云石胶结物的δ18 OPDB值介于-12.20‰～-10.20‰。晚成岩阶段碳酸盐胶结物的碳同位素值具有正漂移现象,δ13 CPDB值介于-0.9‰～+3.58‰,说明其主要来源于沙四段湖相碳酸盐岩的溶解—再沉淀作用,有机酸的参与显得相对次要,或者是由于羧酸分子内碳同位素分馏作用的影响。

关键词：东营凹陷超压流体碳酸盐胶结物流体包裹体碳氧稳定同位素

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