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Main Controlling Factors and Dominant Reservoir Series Analysis of Es_3 in the Qibei Area of Qikou Sag

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Acta Geologica Sinica(English Edition) 2013年第1期87卷 219-231页

作者： PU Xiugang han wenzhong HUA Shuangjun ZhanG Wei CHEN Changwei Research Department of Fundamental Geology Exploration and Development Research InstituteDagang Oilfield

Based on analysis of geophysical data such as core observation, rock slices identification, physical property, scanning electron microscope, X-ray diffraction, logging data etc., 16 factors of sedimentation, diagenesis, fluid pressure, and their relationships with reservoir physical property were analyzed, and the results indicate sedimentation is the internal factor controlling the reservoir property, diagenesis is the external and final decisive factor and abnormal fluid pressure is an important factor preserving the deep reservoir property. Quantitative characterization of diagenesis indicates that compaction and dissolution are more important than cementation and they respectively cause porosity change of-23.6% and 7.7% and -6.2%. Through optimizing 11 main controlling factors and constructing reservoir evaluation index （REI） according to the hierarchical cluster and principal component analysis, reservoir classification standard was established and reservoirs were divided into four classes. The studies show that Es~ SQ4 consists mainly of class I and II, while Es~ SQ6 is mainly of class III and II; the favorable zone is the north and south slope of Qibei sub-sag and the Liujianfang fault-nose. The successful application of the quantitative and comprehensive evaluation in the Qibei area verifies the advanced, practicable method of less artificial factor is suitable for the low porosity and permeability reservoir.

关键词： single factor analysis quantitative characterization comprehensive and quantitativereservoir evaluation Shahejie Formation Qibei area Qikou sag

沧东凹陷孔二段页岩生排烃效率及对含油性的影响

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中国石油大学学报（自然科学版） 2024年第2期48卷 45-56页

作者：冯家乐杨升宇胡钦红马斌玉文家成王旭阳蒲秀刚韩文中张伟中国石油大学(华东)深层油气全国重点实验室山东青岛266580 中国石油大学(华东)地球科学与技术学院山东青岛266580 长江大学地球科学学院湖北武汉430100 中国石油大港油田公司天津300280

渤海湾盆地沧东凹陷孔二段页岩油资源潜力巨大,且通过水平井钻控获得了稳产工业油流。应用常规热解和分步热解技术,优化生排烃物质平衡法,提出了基于原始生烃潜力和现今残余生烃潜力的页岩生烃和排烃效率氢指数平衡计算方法,并探索成熟... 详细信息

渤海湾盆地沧东凹陷孔二段页岩油资源潜力巨大,且通过水平井钻控获得了稳产工业油流。应用常规热解和分步热解技术,优化生排烃物质平衡法,提出了基于原始生烃潜力和现今残余生烃潜力的页岩生烃和排烃效率氢指数平衡计算方法,并探索成熟度以外孔二段页岩排烃效率的主控因素及其与含油性的关系。选取深度和成熟度较为接近的样品,以排除成熟度这一公认的生排烃效率指标的影响。结果表明,页岩有机质丰度和类型、微观孔隙结构和岩石类型等是控制其生排烃效率的重要因素。Ⅲ型干酪根产物以轻烃为主,排烃效率变化大且普遍高于Ⅰ型和Ⅱ型干酪根。Ⅰ型和Ⅱ型干酪根在TOC超过3%以后,排烃效率随TOC的增加而增大。墨水瓶型孔对液态烃的滞留能力强于狭缝型孔;对气态烃而言墨水瓶型孔反而是利于排烃的优势通道。纹层状页岩比薄层状页岩具有更低的排烃效率。生排烃共同控制着页岩的含油量,页岩中含油量与排烃效率整体呈负相关,但与生烃潜力、生烃效率和滞留烃率的乘积呈明显的正相关性,展示了生排烃效率计算方法的可靠性和实用性。

关键词：沧东凹陷孔二段页岩油排烃效率含油量生烃潜力平衡法

基于质量含油率的湖相页岩油可动资源评价——以渤海湾盆地沧东凹陷孔二段为例

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深圳大学学报（理工版） 2024年第1期41卷 33-41页

作者：窦煜韩文中王文东董姜畅王娜李昊东勐睿大港油田勘探开发研究院天津300280 中国石油大学(华东)石油工程学院青岛266580

页岩样品中普遍存在烃类散失和有机质吸附,导致页岩油可动资源评价不准,为解决该难题,利用中国渤海湾盆地沧东凹陷孔二段G19-25井45 m密闭取心,创新设计了45块次3类(0 h与24 h、密闭与开放、常规与多温阶)页岩热解对比实验和12块次干酪... 详细信息

页岩样品中普遍存在烃类散失和有机质吸附,导致页岩油可动资源评价不准,为解决该难题,利用中国渤海湾盆地沧东凹陷孔二段G19-25井45 m密闭取心,创新设计了45块次3类(0 h与24 h、密闭与开放、常规与多温阶)页岩热解对比实验和12块次干酪根溶胀实验,构建了轻烃恢复校正系数和有机质吸附系数.研究表明,样品放置24 h后轻烃平均损失率为29.4%,开放条件下碎样轻烃平均损失率为21.0%,常规热解轻烃平均损失率为15.5%,综合平均损失率为47.1%,即原始地层状态下页岩滞留烃量是常规热解游离烃量的2倍(页岩油轻烃校正系数为2.0);页岩中单位有机质吸附烃量随着镜质体反射率Ro增加而逐渐降低,当Ro为0.8%~1.1%时,页岩有机质吸附油量平均为0.1(质量分数).本研究创建页岩油可动资源评价的质量含油率新方法,提出用页岩质量含油率表征页岩滞留烃去除有机质吸附烃后的页岩中可动烃量,评价孔二段页岩油可动资源量为6.8×10^(8)t,研究成果可为类似盆地页岩油研究提供借鉴.

关键词：地质学页岩油资源评价含油率多温阶热解孔二段沧东凹陷

Micropore structure characteristics and quantitative characterization methods of lacustrine shale-A case study from the member 2 of Kongdian Formation, Cangdong sag, Bohai Bay Basin

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Petroleum Research 2020年第2期5卷 93-102页

作者： Lihong Zhou Changwei Chen Fei Yang wenzhong han Quansheng Guan China National Petroleum Corporation Ltd. Dagang Oilfield BranchTianjin300280China

To better understand the micropore characteristics of lacustrine shale and develop quantitative methodsfor characterizing lacustrine shale, the reservoir space types, structures and spatial distribution patternsof effective pores in the shale of Member 2 of Kongdian Formation in Cangdong sag are studied usingcores, thin sections, scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM),nuclear magnetic resonance (NMR), whole-rock X-ray diffraction (XRD) data, etc. Various shale porositycalculation methods are evaluated. The study results show that the reservoir spaces of the shale mainlyinclude three types, i.e., matrix pores, organic pores and fractures. Flaky pore throats formed bydissolution-induced pores and mould pores can improve the pore connectivity. NMR effective porosity ofthe shale varies from 0.59% to 4.42% with an average of 2.38%, accounting for 49.54% of the total NMRporosity and 34.53% of the gas porosity. The shale is divided into the unimodal-type felsic shale, bimodaltype felsic shale, carbonate shale and mixed shale. The different lithologies exhibit linear correlationsamong NMR, gas and effective porosities. The shale has effective porosity of 0.56%-4.53% with an averageof 2.12%. Furthermore, the shale reservoir is divided into four classes: Class I reservoir with effectiveporosities of more than 2.5%;Class II1 reservoir with effective porosity of 2.0%-2.5%;Class II2 reservoirwith effective porosity of 1.5%-2%;and Class III reservoir with effective porosity of less than 1.5%.

关键词： Lacustrine shale Rservoir space type Pore structure Effective porosity Sweet spot evaluation Member 2 of Kongdian Formation Cangdong sag Bohai Bay Basin

沧东凹陷深湖亚相纹层状页岩成因及页岩油可动性影响因素

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石油学报 2024年第5期45卷 804-816页

作者：解德录赵贤正金凤鸣蒲秀刚韩文中时战楠张伟董雄英中国石油大港油田公司天津300280 中国石油天然气集团有限公司咨询中心北京100724

纹层是深湖亚相页岩的重要沉积结构,对页岩油的可动性具有重要影响。以渤海湾盆地沧东凹陷孔店组二段(孔二段)为例,综合X射线衍射、岩石热解、X射线荧光光谱、全自动矿物分析、场发射扫描电镜和氮气吸附等测试技术,从微米—纳米尺度探... 详细信息

纹层是深湖亚相页岩的重要沉积结构,对页岩油的可动性具有重要影响。以渤海湾盆地沧东凹陷孔店组二段(孔二段)为例,综合X射线衍射、岩石热解、X射线荧光光谱、全自动矿物分析、场发射扫描电镜和氮气吸附等测试技术,从微米—纳米尺度探讨了纹层状页岩中页岩油的特征和成因,并深入分析了页岩油可动性的控制因素。研究结果表明:孔二段页岩主要有5类纹层,即长英质纹层、灰云质纹层、黏土质纹层、方沸石质纹层和混合质纹层,其中,前3类纹层的平均厚度分别约为250μm、125μm和65μm。这些纹层主要构成了3类纹层状页岩:纹层状长英质页岩、纹层状灰云质页岩和纹层状混合质页岩。根据细粒沉积的有机相分类,纹层状长英质页岩形成于强外源输入的淡水沉积环境,而纹层状灰云质页岩形成于高含硫的碳酸盐/蒸发岩等相对咸水沉积环境,这反映二者在高效生烃机理上存在差异。进一步研究表明,有机-无机地质因素共同影响纹层状页岩中页岩油的可动性。有利于页岩油流动的因素包括:页岩具有适中的总有机碳含量(1%~4%)和最高热解峰温(435~450℃),发育产气型干酪根而非产油型干酪根,具有更高的碳酸盐含量而非长英质含量、大孔径和更低的孔隙比表面积。研究成果有望为深化陆相页岩油“甜点”评价、指导页岩油勘探开发提供理论指导。

关键词：纹层深湖亚相页岩油沧东凹陷渤海湾盆地

断陷湖盆细粒区页岩组构特征与页岩油富集成藏规律:以黄骅坳陷古近系为例

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中南大学学报（自然科学版） 2024年第3期55卷 994-1007页

作者：蒲秀刚付永强时战楠柴公权陈长伟姜文亚韩文中鄢继华官全胜许静董姜畅中国石油大港油田公司天津300280 中国石油大学(华东)地球科学与技术学院山东青岛266580

为明确断陷湖盆细粒区页岩微观组构特征及页岩油富集成藏规律,基于黄骅坳陷古近系孔二段、沙三段、沙一段3套页岩层系取心、测井、录井及试油等资料,综合利用矿物分析-场发射扫描电镜、氩离子抛光-场发射扫描电镜、聚焦离子束-场发射扫... 详细信息

为明确断陷湖盆细粒区页岩微观组构特征及页岩油富集成藏规律,基于黄骅坳陷古近系孔二段、沙三段、沙一段3套页岩层系取心、测井、录井及试油等资料,综合利用矿物分析-场发射扫描电镜、氩离子抛光-场发射扫描电镜、聚焦离子束-场发射扫描电镜等技术手段,针对页岩样品开展多尺度、多维度精细表征,从微观、定量的角度系统分析了页岩矿物、有机质、孔隙及页岩油赋存特征,揭示了页岩油成藏富集规律并建立了富集模式。研究结果表明:在微观视域下,多类型矿物以“组分混合”和“组构叠置”构成复杂页岩类型;储集空间可划分为无机孔隙、有机孔隙和微裂缝3大类9小类,其中无机孔隙贡献率平均可达85%以上,孔径<50 nm的孔隙占据储集空间的主体;微观上有机质可划分为同沉积有机质、交生分异有机质和运移充填有机质3种类型;烃类主要赋存于长英质纹层、灰云质纹层或粉砂岩纹层中。基于矿物、有机质、储集空间、烃类4个要素的“四元耦合”页岩油富集成藏规律,建立了3类富集成藏模式。在该模式指导下,沧东凹陷孔二段实施多口水平井获高产,优质页岩油区块已经实现当今油价下的效益开发,歧口凹陷沙三段及沙一下亚段页岩油均获得重要突破,展示出黄骅坳陷古近系页岩油具有广阔的资源前景。

关键词：页岩油孔店组二段沙河街组三段沙河街组一段黄骅坳陷组构特征富集成藏规律

黄骅坳陷古近系细粒沉积区勘探开发认识技术迭代与页岩油增储上产成效

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石油学报 2024年第9期45卷 1399-1408页

作者：蒲秀刚柴公权许静时战楠韩文中官全胜刘学伟李昊东王栋董姜畅中国石油大港油田公司天津300280

渤海湾盆地黄骅坳陷纹层型页岩油资源量为32.6×10^(8)t,是常规油资源量的1.2倍,勘探开发潜力巨大,但规模效益开发动用仍面临高产甜点层优选、复杂断块长水平段优快钻完井、均匀高效压裂改造、高效开采等多方面难题。为此,持续深化陆相... 详细信息

渤海湾盆地黄骅坳陷纹层型页岩油资源量为32.6×10^(8)t,是常规油资源量的1.2倍,勘探开发潜力巨大,但规模效益开发动用仍面临高产甜点层优选、复杂断块长水平段优快钻完井、均匀高效压裂改造、高效开采等多方面难题。为此,持续深化陆相纹层型页岩油"中源-高储-优保"富集条件认识,针对复杂断块陆相页岩油效益甜点评价和箱体优选、井网部署、优快钻完井、压裂改造和排采制度等方面进行了系统攻关,提出了"中高匹配"的页岩油富集规律及模式,总结形成可复制推广的多甜点"W"型立体开发布井、密切割高强度前置二氧化碳增能高效压裂、"焖井置换+高压钻塞+控压生产"高效排采等开发主体技术。迭代技术应用在沧东5号平台效益开发试验中取得了良好效果,5口试验井测试单井峰值日产量为39.6~122.3 t,截至2024年6月28日已连续自喷生产545~574 d,累积产油量为8.9×10^(4)t,建成中国首个10万吨级纹层型页岩油效益开发示范平台;进一步推广主体开发技术,歧口凹陷沙河街组三段首个先导试验平台(6号)建成投产,3口井已连续自喷生产222~225 d,累积产油量为1.64×10^(4)t。

关键词：黄骅坳陷古近系陆相细粒区纹层型页岩页岩油效益勘探开发

Fine-grained rock fabric facies classification and its control on shale oil accumulation: a case study from the Paleogene Kong 2 Member, Bohai Bay Basin

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Frontiers of Earth Science 2021年第2期15卷 423-437页

作者： wenzhong han Xianzheng ZHAO Xiugang PU Shiyue CHEN Hu WANG Yan LIU Zhannan SHI Wei ZhanG Jiapeng WU School of Earth Science and technology China University of Petroleum(East China)Qingdao 266580China Dagang Oil Field Company of PetroChina Tianjin 300280China Key Laboratory of Exploration Technologies for Oil and Gas Resources(Ministry of Education) Yangtze UniversityWuhan 430100China

Lacustrine shale oil resources in China are abundant,with remarkable exploration breakthroughs being *** to marine shale oil in North America,efficient exploration of lacustrine shale oil is more difficult;thus,selecting favorable layer and optimization zone for horizontal wells is more *** this study,based on systematic coring of approximately 500 m fine-grained deposits of the Kong 2 Member,combining laboratory tests and log data,source rock geochemistry and reservoir physical properties,the favorable rock fabric facies for oil accumulation was analyzed and ***,the dominant lithologic facies,organic facies,and bed combination facies were determined based on mineral composition from logging,total organic content(TOC),and sedimentary ***,10 fabric facies were classified by combining these three facies,with 4 fabric facies were found to have high TOC content,high total hydrocarbon,and strong fluorescence features,indicating good shale oil ***,the distribution of the upon good fabric facies was identified to be located at the top of the Kong 2 Member,with evidences of seismic resistivity inversion,thermal maturity,structure depth,and strata *** the favorable facies were found to be stably distributed lateral at the area of about 100 *** oil flow has been detected at this layer within this area by several wells,including horizontal *** exploratory study of fabric facies classification and evaluation provides a new research idea for lacustrine shale oil exploration and effectively promotes breakthroughs in lacustrine shale oil exploration in Bohai Bay Basin.

关键词： fabric facies fine grained deposits lithologic facies organic facies Bohai Bay Basin

Spontaneous imbibition characteristics of shale oil reservoir under the influence of osmosis

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International Journal of Coal Science & Technology 2022年第5期9卷 48-58页

作者： Yuliang Su Qinghao Sun Wendong Wang Xincheng Guo Jilong Xu Guanqun Li Xiugang Pu wenzhong han Zhannan Shi Key Laboratory of Unconventional Oil&Gas Development China University of Petroleum(East China)Ministry of EducationQingdao 266580China School of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580China PetroChina Dagang Oilfield Company Tianjin 300280China

The spontaneous imbibition(SI)process in shale oil reservoirs is not only infuenced by capillary force,but also by the osmotic pressure between the fracturing fuid and formation water in the nanopores *** this study,experimental methods are used to investigate the mechanisms of osmosis in the SI,taking into account the presence of initial formation water in shale oil *** investigate the efect of osmosis,SI experiments were performed on the fne-grained felsic shale of the Qikou sag of Dagang ***-feld NMR testers and high-precision electronic balances are utilized for the measuring of oil–water *** results show that,when Sw≠0,high-salinity fuid SI can be divided into four stages:initial imbibition stage,drainage stage,secondary imbibition stage and stationary stage;when Sw=0,there is no drainage stage of high-salinity fuid SI;when Sw≠0 or Sw=0,low-salinity fuid SI can be called the“osmosis-enhanced SI”;and we have found that“newly formed pores or microfractures”as well as reducing salinity can promote *** article presents a systematic study of SI of shale oil reservoirs under the infuence of osmosis,which provide useful information for reservoir numerical simulation and development program design.

关键词： Shale oil Spontaneous imbibition Osmosis Water saturation Capillarity