Lithologic Reservoirs ›› 2025, Vol. 37 ›› Issue (2): 70-80.doi: 10.12108/yxyqc.20250207

• PETROLEUM EXPLORATION • Previous Articles    

Characteristics and genetic mechanisms of anomalous high-porosity zones of the Paleogene Dongying Formation in western sub-sag of the Bozhong Sag

ZHU Wenqi1, ZAN Chunjing2, ZHANG Ying1, WANG Tao1, SHI Zhaowen2, BA Lixia2, CHEN Liang2, JI Hancheng2   

  1. 1. CNOOC Research Institute Co., Ltd., Beijing 100028, China;
    2. College of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China
  • Received:2024-10-11 Revised:2024-11-15 Published:2025-03-06

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Abstract: Based on the analysis of drilling and logging data，combined with core analysis and test data such as thin section identification，scanning electron microscopy and X-ray diffraction，the reservoir characteristics，distribution law and genesis mechanism of the Paleogene Dongying Formation in western sub-sag of the Bozhong Sag were analyzed. The results show that：（1）The lithology of the Paleogene Dongying Formation in western sub-sag of the Bozhong Sag is mainly feldspathic sandstone，lithic feldspathic feldspathic sandstone and feldspathic lithic sandstone，and the reservoir space is dominated by secondary karst pores，followed by primary intergranular pores.（2）The abnormally high porosity zone in the study area is mainly developed in the depth range of 2 400-3 400 m，and the pore types are mainly intergranular dissolution pores，particle dissolution pores and microcracks.（3）The physical properties of the reservoirs in the Dongying Formation in the study area are mainly controlled by the original sedimentary environment，and the subfacies reservoirs in the front edge of the braided river delta have good sortability，medium particle size，low cementation content，and excellent reservoir performance.（4）The Dongying Formation in the study area are in the mesodiagenetic stage A，which forms a large number of dissolved secondary pores due to the high degree of thermal evolution of organic matter（0.5% ≤ Ro ≤ 1.0%），the increase of organic acid content，and the dissolution of unstable components such as carbonate cement，feldspar and cuttings. Among them，the H2S generated by the thermal redox reaction（TSR reaction）of sulfate also caused the formation of a small number of secondary pores，and these factors improved the physical properties of the reservoir to varying degrees. Combined with diagenetic facies analysis，the TSR reaction zone and cementation-dissolution facies distribution area in the sedimentary microfacies at the inner front of the braided river delta and the inner front of the shallow water delta are favorable reservoir development areas in the study area.

Key words: anomalous high-porosity ones, secondary dissolved pores, sedimentary environment, front edge of the braided river delta, TSR reaction, Dongying Formation, Paleogene, the western sub-sag, Bozhong Sag

CLC Number: 

  • TE122.2
[1] 周家雄,徐春强,杨海风,等.渤海湾盆地石臼坨凸起秦皇岛27-3大型油田发现与地质新认识[J].中国海上油气,2024, 36(1):14-25. ZHOU Jiaxiong,XU Chunqiang,YANG Haifeng,et al.Discovery and geological insights into QHD 27-3 large oilfield in Shi-jiutuo uplift of Bohai bay basin[J]. China Offshore Oil and Gas,2024,36(1):14-25.
[2] WANG Xiang,LIU Guangdi,WANG Xiaolin,et al. Geophysical prediction of organic matter abundance in source rocks based on geochemical analysis:A case study of southwestern Bozhong Sag,Bohai Sea,China[J]. Petroleum Science,2024,21(1):31-53.
[3] WANG Qi,HAO Fang,XU Changgui,et al. The origin and charging directions of neogene biodegraded oils:A geochemical study of large oil fields in the middle of the Shijiutuo Up-lift,Bohai Sea,China[J]. Marine and Petroleum Geology, 2017,88:200-213.
[4] 王德英,于娅,张藜,等.渤海海域石臼坨凸起大型岩性油气藏成藏关键要素[J].岩性油气藏,2020,32(1):1-10. WANG Deying,YU Ya,ZHANG Li,et al.Key factors for reser-voir formation of large lithologic reservoirs in Shijiutuo uplift, Bohai Sea[J]. Lithologic Reservoirs,2020,32(1):1-10.
[5] 吕世聪,王少鹏,张汶,等.石臼坨凸起南部陡坡带扇三角洲沉积特征研究[J].天然气与石油,2024,42(1):54-62. LYU Shicong,WANG Shaopeng,ZHANG Wen,et.al.Research on the sedimentary characteristics of fan delta on the southern steep-slope of Shijiutuo Uplift[J]. Natural Gas and Oil,2024, 42(1):54-62.
[6] CHEN Xiaoyan,WANG Feilong,LI Huiyong,et al. Differential oil accumulation and its controlling factors for CFD6-4 oilfield at the steep slope belt on the southern margin of Shijiutuo Uplift in Bohai Sea[J]. Marine and Petroleum Geology,2021, 133:105266.
[7] 曹英权,曲希玉,王清斌,等.渤中凹陷CFD6-4油田东营组储层特征及物性控制因素[J].地质通报,2024,43(5):701-711. CAO Yingquan,QU Xiyu,WANG Qingbin,et al. Reservoir characteristics and controlling factors of physical properties of the Dongying Formation of the CFD6-4 Oilfield in the Bozhong Sag[J]. Geological Bulletin of China,2024,43(5):701-711.
[8] 张磊,李莎,罗波波,等.东濮凹陷北部古近系沙三段超压岩性油气藏成藏机理[J].岩性油气藏,2024,36(4):57-70. ZHANG Lei,LI sha,LUO bobo,et al. Accumulation mecha-nism of overpressured lithologic reservoirs of the third member of Paleogene Shahejie Formation in northern Dongpu Sag[J]. Lithologic Reservoirs,2024,36(4):57-70.
[9] 周晓光,黄晓波,王启明,等.渤海海域石南陡坡带多期砂砾岩扇体识别与展布特征[J].东北石油大学学报,2020,44(2):46-55. ZHOU Xiaoguang,HUANG Xiaobo,WANG Qiming,et. al. Identification and description of the multi-stage sandy conglom-erate fan body in Shinan Steep Slope Zone,Bohai Sea[J]. Jour-nal of Northeast Petroleum University,2020,44(2):46-55.
[10] 远光辉,操应长,贾珍臻,等.含油气盆地中深层碎屑岩储层异常高孔带研究进展[J].天然气地球科学,2015,26(1):28-42. YUAN Guanghui,CAO Yingchang,JIA Zhenzhen,et al. Research progress on anomalously high porosity zones in deeply buried clastic reservoirs in petroliferous basin[J]. Natural Gas Geoscience,2015,26(1):28-42
[11] BLOCH S,LANDER R H,Bonnell L. Anomalously high porosity and permeability in deeply buried sandstone reservoirs:origin and predictability[J]. AAPG Bulletin,2002,86(2):301-328.
[12] 徐子煜,王安,韩长城,等.玛湖地区三叠系克拉玛依组优质砂砾岩储层形成机制[J].岩性油气藏,2020,32(3):82-92. XU Ziyi,WANG An,HAN Changcheng,et al. Formation mechanism of high-quality sandy-conglomerate reservoir of Tri-assic Karamay Formation in Mahu area[J]. Lithologic Reservoirs,2020,32(3):82-92.
[13] LI Huan,YANG Xianghua,ZHU Hongtao,et al. Depositional and diagenetic controls on the evolution of abnormally high po-rosity in braided river deltaic sandstones (Oligocene),Xihu De-pression,East China Sea[J]. Geoenergy Science and Engineer-ing,2023,226:211751.
[14] 张晓丽,王小娟,张航,等.川东北五宝场地区侏罗系沙溪庙组储层特征及主控因素[J].岩性油气藏,2024,36(5):87-98. ZHANG Xiaoli,WANG Xiaojuan,ZHANG Hang,et al.Reser-voir characteristics and main controlling factors of Jurassic Shaximiao Formation in Wubaochang area,northeastern Sich-uan Basin[J]. Lithologic Reservoirs,2024,36(5):87-98.
[15] 魏成林,张凤奇,江青春,等.准噶尔盆地阜康凹陷东部深层二叠系超压形成机制及演化特征[J].岩性油气藏,2024,36(5):167-177. WEI Chenglin,ZHANG Fengqi,JIANG Qingchun,et al. Formation mechanism and evolution characteristics of overpres-sure in deep Permian in eastern Fukang Sag,Junggar Basin[J]. Lithologic Reservoirs,2024,36(5):167-177.
[16] 于江茗,曲希玉,王清斌,等.压力封存箱的储层特征及其对油气成藏的影响:以渤海湾盆地渤中坳陷石臼坨凸起东倾没端QHD35-A井为例[J].天然气地球科学,2024,35(6):949-960. YU Jiangming,QU Xiyu,WANG Qingbin,et al.Reservoir char-acterization of pressure sequestration boxes and its implications for hydrocarbon formation:A case study of the Well QHD35-A at the east pitching end of Shijiutuo Bulge in the Bozhong De-pression,Bohai Bay Basin[J].Natural Gas Geoscience,2024, 35(6):949-960.
[17] 何玉,周星,李少轩,等.渤海湾盆地渤中凹陷古近系地层超压成因及测井响应特征[J].岩性油气藏,2022,34(3):60-69. HE Yu,ZHOU Xing,LI Shaoxuan,et al. Genesis and logging response characteristics of formation overpressure of Paleogene in Bozhong Sag,Bohai Bay Basin[J]. Lithologic Reservoirs, 2022,34(3):60-69.
[18] 黄向胜,闫琢玉,张东峰,等.琼东南盆地Ⅱ号断裂带新生界多期热流体活动与天然气运聚特征[J].岩性油气藏,2024, 36(5):67-76. HUANG Xiangsheng,YAN Zhuoyu,ZHANG Dongfeng,et al. 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.
[19] 郑彬,董翱,张源智,等.济阳坳陷渤南洼陷古近系沙河街组流体压力建场过程及其石油地质意义[J].岩性油气藏, 2023,35(2):59-67. ZHENG Bin,DONG Ao,ZHANG Yuanzhi,et al.Fluid pressure field building process and its petroleum geological significance of Paleogene Shahejie Formatiom in Bonan sag,Jiyang Depression[J].Lithologic Reservoirs,2023,35(2):59-67.
[20] 李佳伟,王冠民,张宝.渤中凹陷石南陡坡带断层活动对古近系砂砾岩扇体规模的定量控制[J].甘肃科学学报,2019,31(5):113-123. LI Jiawei,WANG Guanmin,ZHANG Bao. The quantitative control of fault motion of shinan steep slope zone in Bozhong Depression on the scale of paleogene glutenite fan[J]. Journal of Gansu Sciences,2019,31(5):113-123.
[21] 杨波,徐长贵,牛成民.墙角型陡坡带岩性圈闭油气成藏条件研究:以渤海湾盆地石南陡坡带中段BZ3区古近系东营组为例[J].古地理学报,2011,13(4):434-442. YANG Bo,XU Changgui,NIU Chengmin. Conditions for hy-drocarbon reservoirs formation of lithologic trap in wall-cornertype steep slope belt:A case on the Paleogene Dongying Formation of BZ3 block in middle part of Shinan steep slope belt, Bohai Bay Basin[J]. Journal of Palaeogeography,2011,13(4):434-442.
[22] CHAO Fu,LI Shengli,LI Shunli,et al. Tectonostratigraphic evolution of a rift basin and corresponding source-to-sink systems:Implications for the western Bohai Bay Basin,North China[J]. Marine and Petroleum Geology,2022,139:105587.
[23] KASHIF M,CAO Yingchang,DIN N U,et al. Origin of quartz cement in the paleogene sandstone reservoir of Shahejie Formation,Bohai Bay Basin,china[J]. Acta Geologica Sinica-English Edition,2022,96(1):248-260.
[24] ATHY L F. Compaction and Oil Migration[J]. AAPG Bulletin, 1930,14(1):25-35.
[25] HEDBERG H D. Gravitational compaction of clays and shales[J]. American Journal of Science,1936:241-287.
[26] 杨田,操应长,石世革,等.中深部碎屑岩储集层异常高孔隙度段划分方案及研究意义[J].矿物岩石地球化学通报, 2017,36(3):483-492. YANG Tian,CAO Yingchang,SHI Shige,et. al. Significance and determination method of anomalously high porosity sections in medium-deep clastic reservoirs[J]. Bulletin of Mineralogy, Petrology and Geochemistry,2017,36(3):483-492.
[27] YANG Li,FAN Aiping,YANG Renchao,et al. Sedimentary fa-cies control on sandstone reservoir properties:A case study from the permian Shanxi Formation in the southern Ordos basin, central China[J]. Marine and Petroleum Geology,2021,129:105083.
[28] NAN Jia,LIU Chiyang,WANG Jianqiang,et al. New insights into cenozoic evolution of the shijiutuo uplift,Bohai Bay basin, china:Constraints from apatite fission track analysis and seismic data[J]. Marine and Petroleum Geology,2024,164:106808.
[29] 罗冰,文华国,廖义沙,等.川东北地区二叠系吴家坪组二段页岩储层特征及有利区分布[J].岩性油气藏,2025,37(1):1-12. LUO Bing,WEN Huaguo,LIAO Yisha,et al.Shale reservoirs characteristics and favorable areas distribution of the second member of Permian Wujiaping Formation in northeastern Sichuan Basin[J]. Lithologic Reserviors,2025,37(1):1-12.
[30] MACHEL H G. Bacterial and thermochemical sulfate reduction in diagenetic settings:old and new insights[J]. Sedimentary Geology,2001,140(1):143-175.
[31] 张倩,王永诗,王学军,等.东营凹陷缓坡带陆相红层砂岩粒度特征及沉积环境意义[J].地质科技通报,2024,43(5):81-94. ZHANG Qian,WANG Yongshi,WANG Xuejun,et al. Grainsize characteristics and sedimentary environmental significance of terrestrial red sandstone in the Dongying Depression with a gentle slope zone[J]. Bulletin of Geological Science and Tech-nology,2024,43(5):81-94.
[32] 张磊,魏小松,唐勇,等.准噶尔盆地玛湖凹陷中部地区多层系油气成藏条件及勘探前景[J].石油学报,2024,45(5):771-786. ZHANG Lei,WEI Xiaosong,TANG Yong,et al. Multi-layer hydrocarbon accumulation conditions and exploration prospect in the central Mahu sag,Junggar Basin[J]. Sedimentary Geology and Tethyan Geology,2024,45(5):771-786.
[33] QIAO R,LI M,ZHANG D,et al. Geochemistry and accumulation of the ultra-deep Ordovician oils in the Shunbei oilfield, Tarim Basin:Coupling of reservoir secondary processes and filling events[J]. Marine and Petroleum Geology,2024,167:106959.
[34] 李志生,李谨,王东良,等.四川盆地含硫化氢气田天然气地球化学特征[J].石油学报,2013,34(增刊1):84-91. LI Zhisheng,LI Jin,WANG Dongliang,et al.. Geochemical characteristics of natural gas in H2S-bearing gas fields in Sichuan Basin[J]. Acta Petrolei Sinica,2013,34(Suppl1):84-91.
[35] 陈健,李洋,齐啸威,等.安徽巢湖凤凰山栖霞组臭灰岩段黄铁矿结核的地球化学[J].地质学报,2024,98(8):2486-2498. CHEN Jian,LI Yang,QI Xiaowei,et al..Geochemistry of nodu-lar pyrites occurred in the odorous limestone of the Early Permian Qixia Formation from Fenghuang Hill of Chaohu City,An-hui Province[J]. Acta Geologica Sinica,2024,98(8):2486-2498
[36] 温思宇,张兵,姚永君,等.川东地区二叠系吴家坪组页岩中黄铁矿形态及其对大洋缺氧事件的指示意义[J].岩性油气藏,2023,35(5):71-80. WEN Siyu,ZHANG Bing,YAO Yongjun,et al. Pyrite morphology in shale of Permian Wujiaping Formation in eastern Sich-uan Basin and its indicative significance to oceanic anoxic events[J]. Lithologic Reservoirs,2023,35(5):71-80.
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