Lithofacies characteristics of fine-grained sedimentary rocks in the upper submember of Member 4 of Shahejie Formation,Dongying sag and their relationship with sedimentary environment

doi:10.7623/syxb201710002

Acta Petrolei Sinica ›› 2017, Vol. 38 ›› Issue (10): 1110-1122.DOI: 10.7623/syxb201710002

• Petroleum Exploration • Previous Articles Next Articles

Lithofacies characteristics of fine-grained sedimentary rocks in the upper submember of Member 4 of Shahejie Formation,Dongying sag and their relationship with sedimentary environment

Wu Jing^1,2, Jiang Zaixing³, Liang Chao⁴

1. Sinopec Petroleum Exploration and Production Research Institute, Beijing 100083, China;
2. Sinopec Key Laboratory of Shale Gas/Oil Exploration & Production, Beijing 100083, China;
3. Faculty of Energy Resources, China University of Geosciences, Beijing 100083, China;
4. School of Geosciences, China University of Petroleum, Shandong Qingdao 266580, China

Received:2017-03-20 Revised:2017-07-28 Online:2017-10-25 Published:2017-11-02

东营凹陷沙河街组四段上亚段细粒沉积岩岩相特征及与沉积环境的关系

吴靖^1,2, 姜在兴³, 梁超⁴

1. 中国石油化工股份有限公司石油勘探开发研究院北京 100083;
2. 中国石油化工集团公司页岩油气勘探开发重点实验室北京 100083;
3. 中国地质大学能源学院北京 100083;
4. 中国石油大学地球科学与技术学院山东青岛 266580

通讯作者: 吴靖,女,1988年6月生,2010年获中国地质大学(武汉)资源学院学士学位,2015年获中国地质大学(北京)能源学院博士学位,现为中国石油化工股份有限公司石油勘探开发研究院高级工程师,主要从事沉积学研究.Email:wujing6524982@163.com
作者简介:吴靖,女,1988年6月生,2010年获中国地质大学(武汉)资源学院学士学位,2015年获中国地质大学(北京)能源学院博士学位,现为中国石油化工股份有限公司石油勘探开发研究院高级工程师,主要从事沉积学研究.Email:wujing6524982@163.com
基金资助:
国家自然科学基金项目（No.41602142）、国家重大科技专项（2016ZX05036-004-001）、中国博士后基金项目（No.2017T100523，2015M582465）、山东省自然科学基金项目（ZR2016DB16）及中国石油化工股份有限公司科技攻关项目（P16043）资助。

Abstract

Abstract:

Lithofacies characteristics of fine-grained sedimentary rocks (FGSR)have impact on the hydrocarbon generation ability and reserving property of shale, and their relationship with sedimentary environment can be analyzed to enrich the research on fine-grained sediment.However, there are insufficient studies regarding the lithofacies of lacustrine FGSR. The lithofacies characteristics are less analyzed based on lithofacies genesis in combination with sedimentary environment. Accordingly, based on massive well cores, thin sections, X-ray diffraction and geochemical data, and the component as the first element, FGSR in the upper submember of Member 4 of Shahejie Formation in Dongying sag was divided into four categories and 12 lithofacies types, so as to analyze the macro, micro, component and genesis characteristics of each lithofacies type. Through analyzing mineral compositions, geochemical indexes and other parameters, it is found that the sedimentary environment in the upper submember of Member 4 of Shahejie Formation can be classified into four stages.The sedimentary environment controls the types and development of lithofacies through controlling the main components of lithofacies;the cyclicity and periodic changes of lithofacies are caused by those in sedimentary environment; the sedimentary environment controls the lithofacies development, and the lithofacies reflects the change of sedimentary environment. During the FGSR analysis, the influences of sudden events (such as transgression and turbidity flow)on lithofacies and sedimentary environment cannot be excluded.

Key words: fine-grained sedimentary rocks, lithofacies characteristics, sedimentary environment, Dongying sag, the upper submember of Member 4 of Shahejie Formation

摘要：

细粒沉积岩的岩相特征影响泥页岩的生烃能力与储集性能，与沉积环境的相互关系分析亦可丰富细粒沉积的研究。然而目前针对陆相细粒沉积岩岩相的研究较为薄弱，基于岩相成因，与沉积环境相结合的岩相特征分析较少。基于大量岩心、薄片、X射线衍射及地球化学数据，以成分为第一要素，以东营凹陷沙河街组四段上亚段细粒沉积岩为例，划分出4大类、12种岩相类型，分析每一种岩相的宏观、微观、成分及成因特征。通过矿物成分、地球化学等多参数的分析发现，沙河街组四段上亚段沉积环境分为4个阶段。沉积环境通过控制岩相主要成分而控制了岩相的类别与发育；沉积环境的旋回性与阶段性变化导致岩相的旋回性与阶段性变化；沉积环境控制岩相发育，岩相亦能反应沉积环境的变化。在细粒沉积分析中，不能排除突发事件（海侵、浊流等）对岩相及沉积环境的影响。

关键词: 细粒沉积岩, 岩相特征, 沉积环境, 东营凹陷, 沙河街组四段上亚段

CLC Number:

TE121

Wu Jing, Jiang Zaixing, Liang Chao. Lithofacies characteristics of fine-grained sedimentary rocks in the upper submember of Member 4 of Shahejie Formation,Dongying sag and their relationship with sedimentary environment[J]. Acta Petrolei Sinica, 2017, 38(10): 1110-1122.

吴靖, 姜在兴, 梁超. 东营凹陷沙河街组四段上亚段细粒沉积岩岩相特征及与沉积环境的关系[J]. 石油学报, 2017, 38(10): 1110-1122.

References

[1] KRUMBEIN W C. Shales and their environmental significance[J].Journal of Sedimentary Petrology,1947,17(3):101-108.
[2] APLIN A C,MACQUAKER J H S.Mudstone diversity:origin and implications for source,seal,and reservoir properties in petroleum systems[J].AAPG Bulletin,2011,95(12):2031-2059.
[3] 姜在兴,梁超,吴靖,等.含油气细粒沉积岩研究的几个问题[J].石油学报,2013,34(6):1031-1039.
JIANG Zaixing,LIANG Chao,WU Jing,et al.Several issues in sedimentological studies on hydrocarbon-bearing fine-grained sedimentary rocks[J].Acta Petrolei Sinica,2013,34(6):1031-1039.
[4] SCHIEBER J,ZIMMERLE W.The history and promise of shale research[C]//SCHIEBER J,ZIMMERLE W,SETHI P.Shales and Mudstones.Basin Studies,Sedimentology and Paleontology.Stuttgart:Schweizerbart'ScheVerlagsbuchhandlung,1998:1-10.
[5] LAZAR O R,BOHACS K M,MACQUAKER J H S,et al.Capturing key attributes of fine-grained sedimentary rocks in outcrops,cores,and thin sections:nomenclature and description guidelines[J].Journal of Sedimentary Research,2015,85(3):230-246.
[6] 冉波,刘树根,孙玮,等.四川盆地及周缘下古生界五峰组-龙马溪组页岩岩相分类[J].地学前缘,2016,23(2):96-107.
RAN Bo,LIU Shugen,SUN Wei,et al.Lithofacies classification of shales of the Lower Paleozoic Wufeng-Longmaxi Formations in the Sichuan Basin and its surrounding areas,China[J].Earth Science Frontiers,2016,23(2):96-107.
[7] CAMP W K,DIAZ E,WAWAK B.Electron microscopy of shale hydrocarbonreservoirs[M].Tulsa,OK:American Association of Petroleum Geologists,2013,102:260.
[8] SMITH M G,BUSTIN R M.Late devonian and early mississippian Bakken and Exshaw black shale source rocks,western Canada sedimentary basin:a sequence stratigraphic interpretation[J].AAPG Bulletin,2000,84(7):940-960.
[9] LOUCKS R G,RUPPEL S C.Mississippian Barnett shale:lithofacies and depositional setting of a deep-water shale-gas succession in the fort worth Basin,Texas [J].AAPGBulletin,2007,91(4):579-601.
[10] SINGH P.Lithofacies and sequence stratigraphic framework of the Barnett shale[D].Northeast Texas:University of Oklahoma,2008.
[11] 梁超,姜在兴,杨镱婷,等.四川盆地五峰组—龙马溪组页岩岩相及储集空间特征[J].石油勘探与开发,2012,39(6):691-698.
LIANG Chao,JIANG Zaixing,YANG Yiting,et al.Characteristics of shale lithofacies and reservoir space of the Wufeng-Longmaxi Formation,Sichuan Basin[J].Petroleum Exploration and Development,2012,39(6):691-698.
[12] WU Lanyu,HU Dongfeng,LU Yongchao,et al.Advantageous shale lithofacies of Wufeng Formation-Longmaxi Formation in Fuling gas field of Sichuan Basin,SW China[J].Petroleum Exploration and Development,2016,43(2):208-217.
[13] 高岗,刘显阳,王银会,等.鄂尔多斯盆地陇东地区长7段页岩油特征与资源潜力[J].地学前缘,2013,20(2):140-146.
GAO Gang,LIU Xianyang,WANG Yinhui,et al.Characteristics and resource potential of the oil shale of Chang 7 Layer in Longdong area,Ordos Basin[J].Earth Science Frontiers,2013,20(2):140-146.
[14] 李吉君,史颖琳,章新文,等.页岩油富集可采主控因素分析:以泌阳凹陷为例[J].中国地质大学学报:地球科学版,2014,39(7):848-857.
LI Jijun,SHI Yinglin,ZHANG Xinwen,et al.Control factors of enrichment and producibility of shale oil:a case study of Biyangdepression[J].Journal of China University of Geosciences:Earth Science,2014,39(7):848-857.
[15] ARTHUR M A,SAGEMAN B B.Marine black shales:depositional mechanisms and environments of ancient deposits[J].Annual Review of Earth and Planetary Sciences,1994,22:499-551.
[16] STOW D A V,HUC A Y,BERTRAND P.Depositional processes of black shales in deep water[J].Marine and Petroleum Geology,2001,18(4):491-498.
[17] SLATT R M,PHILP P R,ABOUSLEIMAN Y,et al.Pore-to-regional-scale integrated characterization workflow for unconventional gas shales[C]//BREYER J A.Shale Reservoirs-Giant Resources for the 21st Century.Tulsa:AAPG,2012.
[18] 胡宗全,杜伟,彭勇民,等.页岩微观孔隙特征及源-储关系——以川东南地区五峰组—龙马溪组为例[J].石油与天然气地质,2015,36(6):1001-1008.
HU Zongquan,DU Wei,PENG Yongmin,et al.Microscopic pore characteristics and the source-reservoir relationship of shale—a case study from the Wufeng and Longmaxi Formations in Southeast Sichuan Basin[J].Oil & Gas Geology,2015,36(6):1001-1008.
[19] POMMER M,MILLIKEN K.Pore types and pore-size distributions across thermal maturity,Eagle Ford Formation,southern Texas[J].AAPG Bulletin,2015,99(9):1713-1744.
[20] YAN D T,WANG Hua,FU Qilong,et al.Geochemical characteristics in the Longmaxi Formation (Early Silurian)of South China:implications for organic matter accumulation[J].Marine and Petroleum Geology,2015,65:290-301.
[21] 宁方兴.济阳坳陷页岩油富集主控因素[J].石油学报, 2015,36(8):905-914.
NING Fangxing.The main control factors of shale oil enrichment in Jiyangdepression[J].Acta Petrolei Sinica, 2015,36(8):905-914.
[22] 薛冰,张金川,唐玄,等.黔西北龙马溪组页岩微观孔隙结构及储气特征[J].石油学报,2015,36(2):138-149.
XUE Bing,ZHANG Jinchuan,TANG Xuan,et al.Characteristics of microscopic pore and gas accumulation on shale in Longmaxi Formation,northwest Guizhou[J]. Acta Petrolei Sinica,2015,36(2):138-149.
[23] 张晓明,石万忠,徐清海,等.四川盆地焦石坝地区页岩气储层特征及控制因素[J].石油学报,2015,36(8):926-939.
ZHANG Xiaoming,SHI Wanzhong,XU Qinghai,et al.Reservoir characteristics and controlling factors of shale gas in Jiaoshiba area,Sichuan Basin[J].Acta Petrolei Sinica,2015,36(8):926-939.
[24] 王同,杨克明,熊亮,等.川南地区五峰组—龙马溪组页岩层序地层及其对储层的控制[J].石油学报,2015,36(8):915-925.
WANG Tong,YANG Keming,XIONG Liang,et al.Shale sequence stratigraphy of Wufeng-Longmaxi Formation in southern Sichuan and their control on reservoirs[J].Acta Petrolei Sinica,2015,36(8):915-925.
[25] 纪文明,宋岩,姜振学,等.四川盆地东南部龙马溪组页岩微—纳米孔隙结构特征及控制因素 [J].石油学报,2016,37(2):182-195.
JI Wenming,SONG Yan,JIANG Zhenxue,et al.Micro-nano pore structure characteristics and its control factors of shale in LongmaxiFormation,southeastern Sichuan Basin[J].Acta Petrolei Sinica,2016,37(2):182-195.
[26] LIANG Chao,JIANG Zaixing,CAO Yingchang,et al.Deep-water depositional mechanisms and significance for unconventional hydrocarbon exploration:a case study from the lower Silurian Longmaxi shale in the southeastern Sichuan Basin[J].AAPG Bulletin,2016,100(5):773-794.
[27] MILLIKEN K.Compositional classification for fine-grained sediments and sedimentary rocks:foundation for bulk rock property prediction[J].Conservation Genetics,2012,12(6):1551-1563.
[28] 郑和荣,高波,彭勇民,等.中上扬子地区下志留统沉积演化与页岩气勘探方向[J].古地理学报,2013,15(5):645-656.
ZHENG Herong,GAO Bo,PENG Yongmin,et al.Sedimentary evolution and shale gas exploration direction of theLowerSilurianinMiddle-UpperYangtzearea[J].Journal of Palaeogeography,2013,15(5):645-656.
[29] SIMENSON A.Depositional Facies and petrophysical analysis of the Bakken formation,Parshall field,MOUNTRAIL COUNTY,North Dakota[D].Golden,Colorado:Colorado School of Mines,2010:1-198.
[30] 邹才能,董大忠,王社教,等.中国页岩气形成机理、地质特征及资源潜力[J].石油勘探与开发,2010,37(6):641-653.
ZOU Caineng,DONG Dazhong,WANG Shejiao,et al.Geological characteristics,formation mechanism and resourcepotential of shale gas in China[J].Petroleum Exploration and Development,2010,37(6):641-653.
[31] PETTIJOHN F J.Sedimentary rocks[M].3rd ed.NewYork:Harper and Row,1975:628.
[32] 刘树根,马文辛,LUBA J,等.四川盆地东部地区下志留统龙马溪组页岩储层特征[J].岩石学报,2011,27(8):2239-2253.
LIU Shugen,MA Wenxin,LUBA J,et al.Characteristics of the shale gas reservoir rocks in the Lower Silurian Longmaxi Formation,East Sichuan basin,China[J].Acta Petrologica Sinica,2011,27(8):2239-2253.
[33] CHEN Shiyue,ZHANG Shun,WANG Yongshi,et al.Lithofacies types and reservoirs of Paleogene fine-grained sedimentary rocks Dongying Sag,Bohai Bay Basin,China[J].Petroleum Exploration and Development,2016,43(2):2018-229.
[34] 张善文,张林晔,李政,等.济阳坳陷古近系页岩油气形成条件[J].油气地质与采收率,2012,19(6):1-5.
ZHANG Shanwen,ZHANG Linye,LI Zheng,et al.Formation conditions of Paleogene shale oil and gas of in Jiyang depression[J].Petroleum Geology and Recovery Efficiency,2012,19(6):1-5.
[35] 胜利油田石油地质志编写组.中国石油地质志-卷六:胜利油田[M].北京:石油工业出版社,1993.
The Oil Geology of Editorial Committee of Shengli Oil Field.Petroleum geology of China:vol.6[M].Beijing:Petroleum Industry Press,1993.
[36] 刘传联,舒小辛,刘志伟.济阳坳陷下第三系湖相生油岩的微观特征[J].沉积学报,2001,19(2):293-298.
LIU Chuanlian,SHU Xiaoxin,LIU Zhiwei.Micro-characteristics of paleogene lacustrine petroleum source rocks in JiyangDepressio[J].Actas Sedimentologica Sinica,2001,19(2):293-298.
[37] 张顺,陈世悦,鄢继华,等.东营凹陷西部沙三下亚段——沙四上亚段泥页岩岩相及储层特征[J].天然气地球科学,2015,26(2):320-332.
ZHANG Shun,CHEN Shiyue,YAN Jihua,et al.Characteristics of shale lithofacies and reservoir space in the 3rd and 4th members of Shahejieformation,the West of Dongyingsag[J].Natural Gas Geoscience,2015,26(2):320-332.
[38] 叶兴树,王伟锋,陈世悦,等.东营凹陷断裂活动特征及其对沉积的控制作用[J].西安石油大学学报:自然科学版,2006,21(5):29-33.
YE Xingshu,WANG Weifeng,CHEN Shiyue,et al.Characteristics of the fault activities in Dongying depression and their controling effects on sediment[J].Journal of Xi'an Shiyou University:Natural Science Edition,2006,21(5):29-33.
[39] 王冰洁.东营凹陷超压特征及演化与油气驱动机制[D].北京:中国地质大学,2012.
WANG Bingjie.Overpressure distribution and evolution,dynamical mechanism of oil and gas,Dongyingdepression[D].Beijing:China University of Geoscience,2012.
[40] 田继军,姜在兴.东营凹陷沙河街组四段上亚段层序地层特征与沉积体系演化[J].地质学报,2009,83(6):836-846.
TIAN Jijun,JIANG Zaixing.Sequence stratigraphy characteristics and sedimentary system evolution of upper Es4 in the Dongyingdepression[J].Acta Geologica Sinica,2009,83(6):836-846.
[41] LILLIS P G.Review of oil families and their petroleum systems of the Williston Basin[J].The Mountain Geologist,2013,50(1):5-31.
[42] MICHAELIS W,SEIFERT R,NAUHAUS K,et al.Microbial reefs in the black sea fueled by anaerobic oxidation of methane[J].Science,2002,297(5583):1013-1015.
[43] 姜在兴.沉积学[M].北京:石油工业出版社,2003.
JIANG Zaixing.Sedimentology[M].Beijing:Petroleum Industry Press,2003.
[44] CAMP W K,EGENHOFF S,SCHIEBER J,et al.A compositional classification for grain assemblages in fine-grained sediments and sedimentary rocks—discussion[J].Journal of Sedimentary Research,2016,86(1):1-5.
[45] 吴靖,姜在兴,钱侃,等.山东省东营凹陷沙四上亚段咸化机制特征[J].地球学报,2014,35(6):733-740.
WU Jing,JIANG Zaixing,QIAN Kan,et al.Characteristics of salinization mechanism on the upper part of fourth member of Shahejie formation in the Dongying sag,Shandong province[J].Acta Geoscientica Sinica,2014,35(6):733-740.
[46] SAWYER E W.The influence of source rock type,chemical weathering and sorting on the geochemistry of clastic sediments from the QUETICOmetasedimentary belt,superior province,Canada[J].Chemical Geology,1986,55(1/2):77-95.
[47] ANDREA M.Geochemical characterization of the Woodford Shale,central and southeastern Oklahoma [D].Oklahoma:The University of Oklahoma,2010.
[48] CUSTODIO E.Aquifer overexploitation:what does it mean?[J]. Hydrogeology Journal,2002,10(2):254-277.

Lithofacies characteristics of fine-grained sedimentary rocks in the upper submember of Member 4 of Shahejie Formation,Dongying sag and their relationship with sedimentary environment

东营凹陷沙河街组四段上亚段细粒沉积岩岩相特征及与沉积环境的关系

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	Cai Yuan, Kong Xiangxin, Jiang Zaixing, Ge Taoyuan, Chen Fengling, Wu Shiqiang, Zhang Liang. Sedimentary environment and organic matter enrichment of Paleogene inter-salt strata in Q ianjiang sag: a case study from 10th rhythmite of the Lower Member 3 of Q ianjiang Formation [J]. Acta Petrolei Sinica, 2022, 43(5): 605-616,636.
[2]	Zhang Jianguo, Jiang Zaixing, Liu Peng, Kong Xiangxin, Ge Yunjin. Deposition mechanism and geological assessment of continental ultrafine-grained shale oil reservoirs [J]. Acta Petrolei Sinica, 2022, 43(2): 234-249.
[3]	Liu Hanlin, Zou Caineng, Qiu Zhen, Pan Songqi, Zhang Wenzheng, Jing Zhenhua, Hao Jihua, Yin Shuai, Wu Songtao, Li Shixiang, Guo Qiulei. Sedimentary enrichment factors of extraordinarily high organic matter in the sub-member 3 of Member 7 of Yanchang Formation,Ordos Basin [J]. Acta Petrolei Sinica, 2022, 43(11): 1520-1541.
[4]	Peng Jun, Yang Yiming, Liu Huimin, Zeng Yao, Yu Ledan, Xu Tianyu. Sedimentary characteristics and genetic mechanism of fine-grained hybrid sedimentary rocks in continental lacustrine basin: a case study of the upper submember of Member 4 of Shahejie Formation in Chenguanzhuang area,southern slope of Dongying sag [J]. Acta Petrolei Sinica, 2022, 43(10): 1409-1426.
[5]	Zhang Jianguo, Jiang Zaixing, Liu Li'an, Yuan Fang, Feng Luyao, Li Changsheng. Lithofacies and depositional evolution of fine-grained sedimentary rocks in the lower submember of the Member 3 of Shahejie Formation in Zhanhua sag, Bohai Bay Basin [J]. Acta Petrolei Sinica, 2021, 42(3): 293-306.
[6]	Liu Zhen, Zhu Maolin, Liu Huimin, Li Xiaoke, Liang Shangzi, Gong Jianqiang, Zhang Pengfei. Formation mechanism and distribution characteristics of granitic weathering crust reservoir: a case study of the western segment of the northern belt of Dongying sag [J]. Acta Petrolei Sinica, 2021, 42(2): 163-175.
[7]	Guo Xiaowen, Chen Jiaxu, Yuan Shengqiang, He Sheng, Zhao Jianxin. Constraint of in-situ calcite U-Pb dating by laser ablation on geochronology of hydrocarbon accumulation in petroliferous basins: a case study of Dongying sag in the Bohai Bay Basin [J]. Acta Petrolei Sinica, 2020, 41(3): 284-291.
[8]	Zhu Guangyou, Zhao Kun, Li Tingting, Fu Xiaodong, Zhang Zhiyao, Chen Zhiyong, Wang Pengju. Sedimentary environment,development model and distribution prediction of Lower Cambrian source rocks in South China [J]. Acta Petrolei Sinica, 2020, 41(12): 1567-1586.
[9]	Du Xuebin, Liu Xiaofeng, Lu Yongchao, Liu Huimin, Zhang Shoupeng, Ma Yiquan, Zhao Ke, Wei Wei. Classification, characteristics and development models of continental fine-grained mixed sedimentation: a case study of Dongying sag [J]. Acta Petrolei Sinica, 2020, 41(11): 1324-1333.
[10]	Ma Bo, Ji Liming, Zhang Mingzhen, Jin Peihong, Yuan Bochao, Long Liwen. Palynofacies characteristics of source rocks of Lower Cretaceous Chijinbao Formation in Jiuxi Basin and their petroleum geological significance [J]. Acta Petrolei Sinica, 2020, 41(11): 1376-1387,1395.
[11]	Zhang Lili, Shu Yu, Cai Guofu, Long Zulie, Liu Dongqing, Wang Fei. Eocene-Oligocene sedimentary environment evolution and its impact on hydrocarbon source conditions in eastern Pearl River Mouth Basin [J]. Acta Petrolei Sinica, 2019, 40(s1): 153-165.
[12]	Wang Yong, Liu Huimin, Song Guoqi, Xiong Wei, Zhu Deshun, Zhu Deyan, Yin Yan, Ding Juhong, Yang Wanqin, Zhang Li, Zhang Shun. Lacustrine shale fine-grained sedimentary system in Jiyang depression [J]. Acta Petrolei Sinica, 2019, 40(4): 395-410.
[13]	Xiong Zhouhai, Cao Yingchang, Wang Guanmin, Liang Chao, Shi Xiaoming, Li Mingpeng, Fu Yao, Zhao Shouqiang. Influence of laminar structure differences on the fracability of lacustrine fine-grained sedimentary rocks [J]. Acta Petrolei Sinica, 2019, 40(1): 74-85.
[14]	Shi Jing, Huang Wenhui, Lü Chenhang, Cui Xiaonan. Geochemical characteristics and geological significance of the Upper Paleozoic mudstones from Linxing area in Ordos Basin [J]. Acta Petrolei Sinica, 2018, 39(8): 876-889.
[15]	Cui Yongqian, Wang Jianguo, Tian Jianzhang, Zhao Zongju, Xiao Yang, Wang Peixi, Tian Ran, Song Chungang, Xiao Fei. Reservoir characteristics and main controlling factors of Cambrian-Ordovician dolomite in the north central part of North China Platform [J]. Acta Petrolei Sinica, 2018, 39(8): 890-901.