Lithologic Reservoirs ›› 2025, Vol. 37 ›› Issue (4): 136-146.doi: 10.12108/yxyqc.20250413

• PETROLEUM EXPLORATION • Previous Articles    

Crude oil filling characteristics and hydrocarbon accumulation model of the second member of Paleogene Kongdian Formation in the deep subsag zone of Cangdong Sag，Bohai Bay Basin

CHEN Jiaxu1, CHEN Changwei2, LIU Guoquan1, ZOU Leiluo1, DONG Xiaowei1, LIU Chuan2, YANG Fei1, ZHONG Wei1   

  1. 1. Exploration and Development Research Institute, PetroChina Dagang Oilfield Company, Tianjin 300280, China;
    2. PetroChina Dagang Oilfield Company, Tianjin 300280, China
  • Received:2025-01-17 Revised:2025-02-21 Published:2025-07-05

PDF (PC)

23

Abstract: With the continuous improvement of exploration ，the exploration direction of Cangdong Sag in Bohai Bay Basin gradually convert from positive tectonic unit to the deep subsag zone，searching for oil reservoir in the deep subsag zone will be the trend for future exploration and development. Based on analysis of hydrocarbon generation evolution， such as crude oil filling time，filling intensity，and filling process of the source rocks in second member of Paleogene Kongdian Formation （Ek2）in the deep subsag zone of Cangdong Sag， hydrocarbon accumulation model in the deep subsag zone of the Cangdong Sag was discussed. The results show that： （1）The oil samples from the Ek2 reservoir in the subsag zone of Cangdong Sag mainly derived from terrigenous organic matter，deposited under brackish lacustrine with redox condition，and sourced from the Ek2 source rocks.（2）The Ek2 source rocks in the deep subsag zone of Cangdong Sag entered intense oil generation from the late Ek1 sedimentation to the sedimentary period of Dongying Formation.The large-scale crude oil filling period was the sedimentary period of Shahejie Formation. The GOI（oil inclusion abundance index）values of the Ek2 reservoir range from 60% to 90%，and the pressure coefficient of the reservoir was 0.99-1.59.（3）The hydrocarbon system in the deep subsag zone of Cangdong Sag is characterized by fast burial rate，early timings of hydrocarbon generation，and high intensity of crude oil injection. Under the background of stable tectonic and source-reservoir interbedded，crude oil is mainly injected from near source，which is conductive to the formation of large-scale lithologic reservoirs.

Key words: oil-source correlation, hydrocarbon generation simulation, fluid inclusion, pressure prediction, source-reservoir interbedded, the second member of Kongdian Formation, Paleogene, deep subsag zone, Cangdong Sag, Bohai Bay Basin

CLC Number: 

  • TE122.1
[1] 大港油气区编纂委员会.中国石油地质志:卷五-大港油气区[M].北京:石油工业出版社,2019.Dagang Oil and Gas Area Compilation Committee.Petroleum geology of China:Volume 5-Dagang Oil and Gas Area[M].Beijing:Petroleum Industry Press,2019.
[2] 周立宏,时筱淞,官全胜,等.渤海湾盆地沧东凹陷南皮斜坡地质特征与油气成藏[J].天然气地球科学,2017,28(9):1289-1297.ZHOU Lihong,SHI Xiaosong,GUAN Quansheng,et al.Geological characteristics and hydrocarbon accumulation of Nanpi Slope in the Cangdong Sag,Bohai Bay Basin[J].Natural Gas Geoscience,2017,28(9):1289-1297.
[3] 赵贤正,周立宏,蒲秀刚,等.断陷湖盆斜坡区油气富集理论与勘探实践:以黄骅坳陷古近系为例[J].中国石油勘探,2017,22(2):13-24.ZHAO Xianzheng,ZHOU Lihong,PU Xiugang,et al.Hydrocarbon enrichment theory and exploration practice in the slope of fault lake basin:A case study of Paleogene in Huanghua Depression[J].China Petroleum Exploration,2017,22(2):13-24.
[4] 赵贤正,金凤鸣,李玉帮,等.断陷盆地斜坡带类型与油气运聚成藏机制[J].石油勘探与开发,2016,43(6):841-849.ZHAO Xianzheng,JIN Fengming,LI Yubang,et al.Slope belt types and hydrocarbon migration and accumulation mechanisms in rift basins[J].Petroleum Exploration and Development,2016,43(6):841-849.
[5] 吕明久,马义忠,曾兴,等.泌阳凹陷深凹区岩性油藏发育规律[J].特种油气藏,2010,17(5):26-29.LYU Mingjiu,MA Yizhong,ZENG Xing,et al.Characteristics of the lithologic reservoirs in the sag area of the Biyang Depression[J].Special Oil & Gas Reservoirs,2010,17(5):26-29.
[6] 张鑫,陈红汉,孔令涛,等.泌阳凹陷深凹区古流体压力演化与油气充注耦合关系[J].地球科学,2020,45(5):1769-1781.ZHANG Xin,CHEN Honghan,KONG Lingtao,et al.The coupling relationship between paleofluid pressure evolution and hydrocarbon-charging events in the deep of Biyang Depression,central China[J].Earth Science,2020,45(5):1769-1781.
[7] 李平和.泌阳凹陷深凹区岩性油藏潜力分析[J].石油地质与工程,2017,31(3):55-57.LI Pinghe.Potential analysis of lithologic reservoirs in the deep subsag zone of the Biyang Sag[J].Petroleum Geology and Engineering,2017,31(3):55-57.
[8] 赵贤正,蒲秀刚,王家豪,等.断陷盆地缓坡区控砂控藏机制与勘探发现:以歧口凹陷歧北缓坡带为例[J].石油学报,2017,38(7):729-739.ZHAO Xianzheng,PU Xiugang,WANG Jiahao,et al.Sand and reservoir controlling mechanism and exploration discovery in the gentle slope of fault basin:a case study of Qibei Slope in Qikou Sag[J].Acta Petrolei Sinica,2017,38(7):729-739.
[9] 周立宏,陈长伟,孙统,等.渤海湾盆地沧东深凹区沧探1井古近系孔二段重大突破与勘探意义[J].中国石油勘探,2024,29(2):16-29.ZHOU Lihong,CHEN Changwei,SUN Tong,et al.A major discovery in the second member of the Paleogene Kongdian Formation in Well Cangtan1 in Cangdong deep subsag area in Bohai Bay Basin and its exploration significance[J].China Petroleum Exploration,2024,29(2):16-29.
[10] 徐祖新,张义杰,王居峰,等.沧东凹陷孔二段常规油与致密油成藏差异性[J].大庆石油地质与开发,2016,35(1):1-6.XU Zuxin,ZHANG Yijie,WANG Jufeng,et al.Differences in the conventional and tight oil reservoir accumulations in Ek2 of Cangdong Sag[J].Petroleum Geology & Oilfield Development in Daqing,2016,35(1):1-6.
[11] 葛维,李云鹏,董晓伟,等.沧东凹陷古近系油气成藏条件与富集模式研究[J].录井工程,2012,23(3):89-92.GE Wei,LI Yunpeng,DONG Xiaowei,et al.Research on oil and gas accumulation conditions and enrichment mode of the Paleocene in Cangdong Depression[J].Mud Logging Engineering,2012,23(3):89-92.
[12] 周自强,朱正平,潘仁芳,等.基于波形相控反演的致密砂岩储层模拟预测方法:以黄骅坳陷沧东凹陷南部古近系孔二段为例[J].岩性油气藏,2024,36(5):77-86.ZHOU Ziqiang,ZHU Zhengping,PAN Renfang,et al.Simulation and prediction of tight sandstone reservoirs based on waveform facies-controlled inversion:A case study from the second member of Paleogene Kongdian Formation in southern Cangdong sag,Huanghua Depression[J].Lithologic Reservoirs,2024,36(5):77-86.
[13] 郑庆华,尤继元.黄骅坳陷王官屯构造带白垩系火山岩油气成藏特征[J].岩性油气藏,2019,31(5):44-51.ZHENG Qinghua,YOU Jiyuan.Hydrocarbon accumulation characteristics of Cretaceous volcanic rocks in Wangguantun tectonic zone,Huanghua Depression[J].Lithologic Reservoirs,2019,31(5):44-51.
[14] 周立宏,陈长伟,杨飞,等.渤海湾盆地沧东凹陷页岩油效益开发探索与突破[J].中国石油勘探,2023,28(4):24-33.ZHOU Lihong,CHEN Changwei,YANG Fei,et al.Research and breakthrough of benefit shale oil development in Cangdong Sag,Bohai Bay Basin[J].China Petroleum Exploration,2023,28(4):24-33.
[15] 马珍珍.沧东凹陷孔二段油气成藏特征及主控因素研究[D].北京:中国石油大学(北京),2020.MA Zhenzhen.Characteristics of hydrocarbon accumulation and main controlling factors of Ek2 in Cangdong Sag[D].Beijing:China University of Petroleum(Beijing),2020.
[16] 赵贤正,周立宏,蒲秀刚,等.断陷湖盆湖相页岩油形成有利条件及富集特征:以渤海湾盆地沧东凹陷孔店组二段为例[J].石油学报,2019,40(9):1013-1029.ZHAO Xianzheng,ZHOU Lihong,PU Xiugang,et al.Favorable formation conditions and enrichment characteristics of lacustrine facies shale oil in faulted lake basin:A case study of Member 2 of Kongdian Formation in Cangdong sag,Bohai Bay Basin[J].Acta Petrolei Sinica,2019,40(9):1013-1029.
[17] 廖然.黄骅坳陷沧东凹陷孔二段成岩作用特征及定量评价[J].岩性油气藏,2013,25(3):28-35.LIAO Ran.Diagenesis and its quantitative evaluation of the second member of Kongdian Formation in Cangdong Sag,Huanghua Depression[J].Lithologic Reservoirs,2013,25(3):28-35.
[18] HAO Fang,ZHOU Xinhuai,ZHU Yangming,et al.Mechanisms for oil depletion and enrichment on the Shijiutuo uplift,Bohai Bay Basin,China[J].AAPG Bulletin,2009,93(8):1015-1037.
[19] 张小琴,李威,王飞龙,等.辽东湾地区古近系烃源岩生物标志物特征及其地质意义[J].岩性油气藏,2022,34(1):73-85.ZHANG Xiaoqin,LI Wei,WANG Feilong,et al.Biomarker characteristics and geological significance of Paleogene source rocks in Liaodong Bay[J].Lithologic Reservoirs,2022,34(1):73-85.
[20] FU Jiamo,SHENG Guoying,XU Jiayou,et al.Application of biological markers in the assessment of paleoenvironments of Chinese non-marine sediments[J].Organic Geochemistry,1990,16(4/6):769-779.
[21] 阳宏,刘成林,王飞龙,等.渤中凹陷东营组古沉积环境及烃源岩发育模式[J].岩性油气藏,2021,33(6):81-92.YANG Hong,LIU Chenglin,WANG Feilong,et al.Paleoenvironment and development model of source rocks of Dongying Formation in Bozhong Sag[J].Lithologic Reservoirs,2021,33(6):81-92.
[22] GOODWIN N,MANN A,PATIENCE R.Structure and significance of C 304-methyl steranes in lacustrine shales and oils[J].Organic Geochemistry,1988,12(5):495-506.
[23] MAO Rong,CHENG Xiong,MAO Zhichao,et al.Hydrocarbon potential and biomarker assemblages of Paleogene source rocks in the Cangdong sag,Bohai Bay Basin,China[J].Journal of Geochemical Exploration,2018,194:9-18.
[24] 唐勇,王智强,庞燕青,等.准噶尔盆地西部坳陷二叠系下乌尔禾组烃源岩生烃潜力评价[J].岩性油气藏,2023,35(4):16-28.TANGYong,WANG Zhiqiang,PANGYanqing,et al.Hydrocarbongenerating potential of source rocks of Permian lower Urho Formation in western depression,Junggar Basin[J].Lithologic Reservoirs,2023,35(4):16-28.
[25] CHEN Jiaxu,GUO Xiaowen,HE Zhiliang,et al.Maturity assessment of solid bitumen in the Sinian carbonate reservoirs of the eastern and central Sichuan Basin,China:Application for hydrocarbon generation modelling[J].Geological Journal,2022,57(11):4662-4681.
[26] CHEN Jiaxu,GUO Xiaowen,HAN Yuanjia,et al.Combination of basin modelling and carbazoles to investigate secondary oil migration pathways in the Dongying depression of the Bohai Bay Basin,China[J].Marine and Petroleum Geology,2021,131:105163.
[27] ATHY L F.Density,porosity,and compaction of sedimentary rocks[J].AAPG Bulletin,1930,14(1):1-24.
[28] FALVEY D A,MIDDLETON F M.Passive continental margins:Evidence for a prebreakup deep crustal metamorphic subsidence mechanism[R].Paris:The 26th International Geological Congress,1980.
[29] GUO Xiaowen,HE Sheng,LIU Keyu,et al.Modelling the petroleum generation and migration of the third member of the Shahejie Formation(Es3) in the Banqiao Depression of Bohai Bay Basin,Eastern China[J].Journal of Asian Earth Sciences,2011,40(1):287-302.
[30] GUO Xiaowen,LIU Keyu,JIA Chengzao,et al.,Hydrocarbon accumulation processes in the Dabei tight-gas reservoirs,Kuqa Subbasin,Tarim Basin,northwest China[J].AAPG Bulletin,2016,100(10):1501-1521.
[31] 郭小文.含油气盆地生烃增压演化研究:以东营凹陷和白云凹陷为例[D].武汉:中国地质大学(武汉),2010.GUO Xiaowen.Overpressure evolution caused by hydrocarbon generation in petroliferous basins:Two cases studies from Dongying and Baiyun depressions[D].Wuhan:China University of Geosciences(Wuhan),2010.
[32] 杨飞,蒲秀刚,姜文亚,等.渤海湾盆地沧东凹陷孔二段细粒相区有机地球化学特征[J].天然气地球科学,2018,29(4):550-558.YANG Fei,PU Xiugang,JIANG Wenya,et al.Organic geochemistry characteristics of the fine grained sedimentary rock of the second member of Kongdian Formation(Ek2) in Cangdong Sag,Huanghua Depression,Bohai Bay Basin[J].Natural Gas Geoscience,2018,29(4):550-558.
[33] BRAUN R,BURNHAM A.Analysis of chemical reaction kinetics using a distribution of activation energies and simpler models[J].Energy & Fuels,1987,1(2):153-161.
[34] 杨水胜,王汇智,闫骁龙,等.鄂尔多斯盆地中南部侏罗系直罗组流体包裹体特征[J].岩性油气藏,2021,33(6):39-47.YANG Shuisheng,WANG Huizhi,YAN Xiaolong,et al.Characteristics and distribution of fluid inclusions of Jurassic Zhiluo Formation in south-central Ordos Basin[J].Lithologic Reservoirs,2021,33(6):39-47.
[35] 唐建云,张刚,史政,等.鄂尔多斯盆地丰富川地区延长组流体包裹体特征及油气成藏期次[J].岩性油气藏,2019,31(3):20-26.TANG Jianyun,ZHANG Gang,SHI Zheng,et al.Characteristics of fluid inclusions and hydrocarbon accumulation stages of Yanchang Formation in Fengfuchuan area,Ordos Basin[J].Lithologic Reservoirs,2019,31(3):20-26.
[36] CHEN Jiaxu,CHEN Changwei,HE Zhiliang,et al.Differential evolution of pore fluid pressure in the Sinian carbonate reservoirs of the central and eastern Sichuan Basin,China:Implication for gas preservation and destruction[J].Geological Journal,2024,59(10):2720-2739.
[37] CHEN Jiaxu,GUO Xiaowen,TAO Ze,et al.U-Pb dating of oil charge in superimposed basins:A case study from the Tarim Basin,NW China[J].Geological Society of America Bulletin,2022,134(11/12):3176-3188.
[38] 姜福杰,姜振学,庞雄奇,等.含油包裹体丰度指数确定油气运聚范围及应用[J].西南石油学院学报,2006,28(5):15-18.JIANG Fujie,JIANG Zhenxue,PANG Xiongqi,et al.Method of determinating oil and gas migration by grains with oil inclusion and its application[J].Journal of Southwest Petroleum Institute,2006,28(5):15-18.
[39] 罗胜元.沾化凹陷渤南洼陷超压系统与油气成藏研究[D].武汉:中国地质大学(武汉),2014.LUO Shengyuan.Study on the overpressure characteristic and hydrocarbon accumulation in Bonan Depression,Zhanhua Subbasin[D].Wuhan:China University of Geosciences(Wuhan),2014.
[40] 周立宏,陈长伟,陈家旭,等.渤海湾盆地黄骅坳陷致密油气勘探新领域及资源潜力[J].石油学报,2025,46(1):154-172.ZHOU Lihong,CHEN Changwei,CHEN Jiaxu,et al.New exploration fields and resource potential of tight oil and gas in Huanghua depression of Bohai Bay Basin[J].Acta Petrolei Sinica,2025,46(1):154-172.
[1] YAN Weitao, LIAO Yun, HUANG Wenming, ZHANG Benjian, HU Xin, LI Wenzheng, WU Juan, DENG Bin. Multi-phase fluid activities and hydrocarbon accumulation process of Permian Qixia Formation，southwestern Sichuan Basin [J]. Lithologic Reservoirs, 2025, 37(4): 73-83.
[2] ZHENG Xin, JIANG Donghui, LI Kun, ZHUANG Jianjian, ZHANG Chuanyun, YANG Chao, YUAN Zhongpeng, WANG Jiaqi. Sand control patterns of fault-landforms-sedimentary slope break and their significance for oil and gas exploration： A case study of the northern section of Baochu slope zone in Xihu Sag，East China Sea Basin [J]. Lithologic Reservoirs, 2025, 37(4): 95-104.
[3] LI Zhenming, JIA Cunshan, WANG Bin, SONG Zhenxiang, QIU Qi, WANG Jiyuan, XU Chenjie, CUI Yuyao. Characteristics and resource potential of source rocks of Carboniferous Shiqiantan Formation in Shiqiantan Sag，eastern Junggar Basin [J]. Lithologic Reservoirs, 2025, 37(4): 115-126.
[4] CHEN Huaiyi, LI Long, BAI Bing, YUE Junpei, KANG Rong, ZHANG Xingqiang. Characteristics and reservoir control of the strike-slip salt arch belt of Shahejie fourth Member Formation of Paleogene system in Laizhou Bay Depression，Bohai Bay Basin [J]. Lithologic Reservoirs, 2025, 37(3): 120-128.
[5] LIAO Xinwu, YANG Qinghong, LI Chao, GUO Cheng, ZHAO Dalin. Sedimentary characteristics of shallow water delta in the Neogene lower member of Minghuazhen Formation, Kenli 6-1 Oilfield in Bohai Bay Basin [J]. Lithologic Reservoirs, 2025, 37(2): 1-11.
[6] ZHU Wenqi, ZAN Chunjing, ZHANG Ying, WANG Tao, SHI Zhaowen, BA Lixia, CHEN Liang, JI Hancheng. Characteristics and genetic mechanisms of anomalous high-porosity zones of the Paleogene Dongying Formation in western sub-sag of the Bozhong Sag [J]. Lithologic Reservoirs, 2025, 37(2): 70-80.
[7] XUE Hui, YE Dashuai, GUO Yuemiao, CHEN Ketong, WU Jianping, XU Mengting, LI Yawen. Meandering river sedimentary characteristics and its control on reservoir of Paleogene Dong 3 Member in Qingyuan area, Baoding Sag, Bohai Bay Basin [J]. Lithologic Reservoirs, 2025, 37(2): 139-152.
[8] QU Xingyu. Sequence stratigraphy division and petroleum geological significance in the middle submember of the third member of Shahejie Formation in Liangdong area, Dongying Sag [J]. Lithologic Reservoirs, 2025, 37(2): 166-177.
[9] HU Xinling, RONG Huanqing, YANG Wei, ZHANG Zaichang, QI Zhixian. Logging identification and application of lacustrine dolomite in the fourth member of the Shahejie Formation in the Bamianhe area of Dongying Sag [J]. Lithologic Reservoirs, 2025, 37(1): 13-23.
[10] LIU Zhifeng, ZHU Xiaoer, LIU Guangdi, WANG Xiang, LI Zekun, WU Xuan, LIANG Yuyang. Study on the difference of petroleum accumulation between Paleogene and Neogene in the western Bozhong Sag，Bohai Bay Basin [J]. Lithologic Reservoirs, 2025, 37(1): 78-89.
[11] WANG Yifeng, TIAN Jixian, LI Jian, QIAO Tong, LIU Chenglin, ZHANG Jingkun, SHA Wei, SHEN Xiaoshuang. Geochemical characteristics of Permian condensate oil and gas and phase types in southwest of Mahu Sag [J]. Lithologic Reservoirs, 2024, 36(6): 149-159.
[12] CHENG Yan, WANG Bo, ZHANG Tongyao, QI Yumin, YANG Jilei, HAO Peng, LI Kuo, WANG Xiaodong. Oil and gas migration characteristics of lithologic reservoirs of Neogene Minghuazhen Formation in Bozhong A-2 area，Bozhong Sag [J]. Lithologic Reservoirs, 2024, 36(5): 46-55.
[13] HUANG Xiangsheng, YAN Zhuoyu, ZHANG Dongfeng, HUANG Heting, LUO Chengfei. Characteristics of multi-phase thermal fluid activity and natural gas migration-accumulation of Cenozoic in No. 2 fault zone of Qiongdongnan Basin [J]. Lithologic Reservoirs, 2024, 36(5): 67-76.
[14] ZHOU Ziqiang, ZHU Zhengping, PAN Renfang, DONG Yu, JIN Jineng. Simulation and prediction of tight sandstone reservoirs based on waveform facies-controlled inversion：A case study from the second member of Paleogene Kongdian Formation in southern Cangdong sag， Huanghua Depression [J]. Lithologic Reservoirs, 2024, 36(5): 77-86.
[15] ZHANG Lei, LI Sha, LUO Bobo, LYU Boqiang, XIE Min, CHEN Xinping, CHEN Dongxia, DENG Caiyun. Accumulation mechanism of overpressured lithologic reservoirs of the third member of Paleogene Shahejie Formation in northern Dongpu Sag [J]. Lithologic Reservoirs, 2024, 36(4): 57-70.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
TRENDMD:

Copyright © 2018 Lithologic Reservoirs

Support by Beijing Magtech support@magtech.com.cn