Lithologic Reservoirs ›› 2023, Vol. 35 ›› Issue (4): 137-144.doi: 10.12108/yxyqc.20230413

• PETROLEUM EXPLORATION • Previous Articles    

Development characteristics and accumulation model of sublacustrine fans of the first member of Eocene Liushagang Formation in Weixinan Sag，Beibuwan Basin

MAN Xiao, HU Desheng, WU Jie, GONG Liyuan, LIU Zhixuan, JIANG Yingde, ZHAO Ye   

  1. Zhanjiang Branch of CNOOC Ltd., Zhanjiang 524057, Guangdong, China
  • Received:2022-08-19 Revised:2022-09-19 Published:2023-07-01

PDF (PC)

202

Abstract: Based on the data of 3D seismic，mud-logging，wire-logging and core observation，the sedimentary characteristics and main controlling factors of the sublacustrine fan of the first member of Eocene Liushagang Formation in Weixinan Sag of Beibuwan Basin were studied，and the lithologic trap development model and hydrocarbon accumulation model were determined. The results show that： （1） The sublacustrine fans are developed in lowstand systems tract（LST）and transgressive systems tract （TST）of the first member of Liushagang Formation in subsag A of Weixinan Sag. The sublacustrine fans in LST are developed near the No. 1 fault，which is characterized by continuous and strong seismic reflection，while the sublacustrine fans in TST are distributed in the sag，and have obvious mound reflection.（2）Controlled by two major factors of source supply and paleogeomorphology，the first member of Liushagang Formation in subsag A developed two stages of sublacustrine fans. During the period of LST，there was little source supply in short axis direction，the footwall of No. 1 fault was the accumulation center of the sag，small scale nearshore submarine fans that directly enter the lake were developed，and lithologic traps that dip upward and pinch out toward the source area were formed. During the period of TST，the source supply gradually increased，the activity of No. 1 fault weakened，and the accumulation center of subsag A gradually migrated to the sag. The loose sediments in the fan delta front transported again into the middle of the sag and developed sublacustrine fans. Lithologic traps that dip and pinch out toward the south slope，and structurallithologic traps shielded by No. 2 fault were formed.（3）Vertical migration conditions are the key factors for lithologic reservoir accumulation in the study area. Microfractures controlled by early faults and late structural differential settlement developed in the upper part of the hydrocarbon source layer of subsag A，providing a good migration path for oil and gas to vertically migrate through mudstone caprocks to the lithologic trap above the source and accumulate to form reservoirs. This area has a reservoir accumulation model of “overpressure driving，microfractures provide migration path， and accumulation in low potential areas”.

Key words: sublacustrine fan, lithologic reservoir, vertical migration, accumulation model, the first member of Liushagang Formation, Eocene, Weixinan Sag, Beibuwan Basin

CLC Number: 

  • TE122.2
[1] 仲米虹,唐武.前陆盆地隆后坳陷区湖底扇沉积特征及主控因素:以塔北轮南地区三叠系为例[J].岩性油气藏, 2018, 30(5):18-28. ZHONG Mihong, TANG Wu. Sedimentary characteristics and controlling factors of sublacustrine fans in backbulge zone of foreland basin:Triassic in Lunnan area, Tarim Basin[J]. Lithologic Reservoirs, 2018, 30(5):18-28.
[2] 马正武,官大勇,王启明,等.辽中凹陷古近系东三段湖底扇沉积特征及控制因素[J].岩性油气藏, 2022, 34(2):131-140. MA Zhengwu, GUAN Dayong, WANG Qiming, et al. Sedimentary characteristics and controlling factors of sublacustrine fans of the third member of Paleogene Dongying Formation in Liaozhong Sag[J]. Lithologic Reservoirs, 2022, 34(2):131-140.
[3] 张辉,曾小明,黄冬梅,等.北部湾盆地涠西南凹陷富砾型和富砂型湖底扇沉积特征差异分析[J].石油实验地质, 2017, 39(5):633-639. ZHANG Hui, ZENG Xiaoming, HUANG Dongmei, et al. Differences of sedimentary characteristics of sublacustrine fans between conglomerate-rich and sand-rich types in the Weixinan Sag, Beibu Gulf Basin[J]. Petroleum Geology&Experiment, 2017, 39(5):633-639.
[4] 胡德胜,张建新,金秋月,等.涠西南凹陷流一段湖底扇沉积及储层特征[J].天然气技术与经济, 2018, 12(3):5-9. HU Desheng, ZHANG Jianxin, JIN Qiuyue, et al. Sublacustrinefan sedimentary and reservoir characteristics of Liushagang 1 member, Weixinan Sag[J]. Natural Gas Technology and Economy, 2018, 12(3):5-9.
[5] 何卫军,甘军,刘芳,等.涠西南凹陷流一段上亚段重力流沉积特征及发育模式[J].油气地质与采收率, 2019, 26(3):31-37. HE Weijun, GAN Jun, LIU Fang, et al. Sedimentary characteristics and development of gravity flow in the upper submember of the first member of Liushagang Formation in Weixinan Sag[J]. Petroleum Geology and Recovery Efficiency, 2019, 26(3):31-37.
[6] 姜平,秦春雨,杨希冰,等.涠西南凹陷一号断裂陡坡带扇体沉积展布特征及主控因素[J].地球科学, 2020, 45(2):534-546. JIANG Ping, QIN Chunyu, YANG Xibing, et al. Sedimentary architecture, distribution features and genesis of steep slope fan in upper Liushagang Formation, Weixinan Sag[J]. Earth Science, 2020, 45(2):534-546.
[7] 金杰华,操应长,王健,等.涠西南凹陷陡坡带流一段下亚段异重流沉积新发现[J].地学前缘, 2019, 26(4):250-258. JIN Jiehua, CAO Yingchang, WANG Jian, et al. New discovery of hyperpycnal flow deposits in the El1x section of the steep slope belt in the Weixinan Sag[J]. Earth Science Frontiers, 2019, 26(4):250-258.
[8] 谭卓,刘志国,李运振,等.北部湾盆地涠西南凹陷陡坡带砂体成因类型及其演化[J].地质调查与研究, 2015, 38(1):1-9. TAN Zhuo, LIU Zhiguo, LI Yunzhen, et al. Forming types and evolution of sand body in steep slope belt of Weixinan Sag, Beibu Gulf Basin[J]. Geological Survey and Research, 2015, 38(1):1-9.
[9] 李春荣,张功成,梁建设,等.北部湾盆地断裂构造特征及其对油气的控制作用[J].石油学报, 2012, 33(2):195-203. LI Chunrong, ZHANG Gongcheng, LIANG Jianshe, et al. Characteristic of fault structure and its control on hydrocarbons in the Beibuwan Basin[J]. Acta Petrolei Sinica, 2012, 33(2):195-203.
[10] 徐建永,张功成,梁建设,等.北部湾盆地古近纪幕式断裂活动规律及其与油气的关系[J].中国海上油气, 2011, 23(6):362-368. XU Jianyong, ZHANG Gongcheng, LIANG Jianshe, et al. Paleogene activities of episodic rifting and their relationships with hydrocarbon in Beibuwan Basin[J]. China Offshore Oil and Gas, 2011, 23(6):362-368.
[11] 胡望水,吴婵,梁建设,等.北部湾盆地构造迁移特征及对油气成藏的影响[J].石油与天然气地质, 2011, 32(6):920-927. HU Wangshui, WU Chan, LIANG Jianshe, et al. Tectonic transport characteristics and their influences on hydrocarbon accumulation in Beibuwan Basin[J]. Oil&Gas Geology, 2011, 32(6):920-927.
[12] 秦春雨,王华,姜平,等.涠西南凹陷边界断层演化及其对地层充填的控制[J].中国矿业大学学报, 2020, 49(2):322-331. QIN Chunyu, WANG Hua, JIANG Ping, et al. Boundary fault evolution of Weixinan Sag and its effect on strata filling[J]. Journal of China University of Mining&Technology, 2020, 49(2):322-331.
[13] 谢宁,操应长,王健,等.北部湾盆地涠西南凹陷古近系流三段成岩作用及对储层物性影响[J].天然气地球科学, 2019, 30(12):1743-1754. XIE Ning, CAO Yingchang, WANG Jian, et al. Diagenesis and its control on physical property of the reservoirs in the 3rd member of the Paleogene Liushagang Formation in Weixinan Depression, Beibuwan Basin[J]. Natural Gas Geoscience, 2019, 30(12):1743-1754.
[14] 裴健翔,董贵能,朱其.北部湾盆地涠西南凹陷流一段强制湖退沉积体特征及其油气地质意义[J].石油与天然气地质, 2016, 37(4):520-527. PEI Jianxiang, DONG Guineng, ZHU Qi. Characteristics and petroleum geological significance of lacustrine forced regressive deposits in the 1st member of Liushagang Formation in Weixinan Sag, Beibuwan Basin[J]. Oil&Gas Geology, 2016, 37(4):520-527.
[15] 金杰华,操应长,王健,等.深水砂质碎屑流沉积:概念、沉积过程与沉积特征[J].地质论评, 2019, 65(3):690-702. JIN Jiehua, CAO Yingchang, WANG Jian, et al. Deep-water sandy debris flow deposits:Concepts, sedimentary processes and characteristics[J]. Geological Review, 2019, 65(3):690-702.
[16] 邹才能,赵政璋,杨华,等.陆相湖盆深水砂质碎屑流成因机制与分布特征:以鄂尔多斯盆地为例[J].沉积学报, 2009, 27(6):1065-1075. ZOU Caineng, ZHAO Zhengzhang, YANG Hua, et al. Genetic mechanism and distribution of sandy debris flows in terrestrial lacustrine basin[J]. Acta Sedimentologica Sinica, 2009, 27(6):1065-1075.
[17] 厚刚福,曾德龙,牛志杰,等.准噶尔盆地砂质碎屑流砂体新发现及其油气勘探意义[J].天然气工业, 2020, 40(11):41-49. HOU Gangfu, ZENG Delong, NIU Zhijie, et al. New discovery of sandy debris flow sandbody and its implications for oil and gas exploration in the Junggar Basin[J]. Natural Gas Industry, 2020, 40(11):41-49.
[18] 操应长,金杰华,刘海宁,等.中国东部断陷湖盆深水重力流沉积及其油气地质意义[J].石油勘探与开发, 2021, 48(2):247-257. CAO Yingchang, JIN Jiehua, LIU Haining, et al. Deep-water gravity flow deposits in a lacustrine rift basin and their oil and gas geological significance in eastern China[J]. Petroleum Exploration and Development, 2021, 48(2):247-257.
[19] 史忠生,王天琦,王建功,等.地震沉积学在不同地质条件下砂体识别中的应用:以松辽盆地西斜坡和长垣地区为例[J].岩性油气藏, 2012, 24(3):5-10. SHI Zhongsheng, WANG Tianqi, WANG Jiangong, et al. Application of seismic sedimentology to sand body identification under different geological settings:A case study from the western slope and placanticline of Songliao Basin[J]. Lithologic Reservoirs, 2012, 24(3):5-10.
[20] 苗顺德,李秋芬.地震沉积学的内涵及其在陆相断陷盆地中的应用[J].岩性油气藏, 2012, 24(4):64-69. MIAO Shunde, LI Qiufen. Concept of seismic sedimentology and its application in continental rift basin[J]. Lithologic Reservoirs, 2012, 24(4):64-69.
[21] 秦春雨,王华,姜平,等.断陷盆地轴向沉积体系空间展布及演化特征:以北部湾盆地涠西南凹陷为例[J].中国矿业大学学报, 2020, 49(3):500-509. QIN Chunyu, WANG Hua, JIANG Ping, et al. Spacial distribution and evolution of axial deltaic systemin continental rift basin:A case study of Weixinan sag, Beibuwan Basin[J]. Journal of China University of Mining&Technology, 2020, 49(3):500-509.
[22] 魏然,李红阳,于斌,等.沉积盆地物源体系分析方法及研究进展[J].岩性油气藏, 2013, 25(3):53-57. WEI Ran, LI Hongyang, YU Bin, et al. Approaches and prospects of provenance system analysis in sedimentary basins[J]. Lithologic Reservoirs, 2013, 25(3):53-57.
[23] 刘雨晴,吴智平,王毅,等.北部湾盆地古近纪断裂体系发育及其控盆作用[J].中国矿业大学学报, 2020, 49(2):360-370. LIU Yuqing, WU Zhiping, WANG Yi, et al. Development of Paleogene fault systems and its control on the basin structures in the Beibuwan Basin[J]. Journal of China University of Mining&Technology, 2020, 49(2):360-370.
[24] 黄保家,黄合庭,吴国瑄,等.北部湾盆地始新统湖相富有机质页岩特征及成因机制[J].石油学报, 2012, 33(1):25-31. HUANG Baojia, HUANG Heting, WU Guoxuan, et al. Geochemical characteristics and formation mechanism of Eocene lacustrine organic-rich shales in the Beibuwan Basin[J]. Acta Petrolei Sinica, 2012, 33(1):25-31.
[25] 赵顺兰,陈林,李才,等.涠西南凹陷碳酸盐岩潜山原油来源及成藏模式[J].长江大学学报(自然科学版), 2019, 16(6):1-8. ZHAO Shunlan, CHEN Lin, LI Cai, et al. Source and reservoir formation pattern of carbonate buried hill crude oil in Weixinan Sag[J]. Journal of Yangtze University (Natural Science Edition), 2019, 16(6):1-8.
[26] 刘化清,刘宗堡,吴孔友,等.地层岩性油气藏区带及圈闭评价技术研究新进展[J].岩性油气藏, 2021, 33(1):25-36. LIU Huaqing, LIU Zongbao, WU Kongyou, et al. New progress in study of play and trap evaluation technology for lithostratigraphic reservoirs[J]. Lithologic Reservoirs, 2021, 33(1):25-36.
[27] 祁鹏,张俊霞.伸展断层传播褶皱研究现状[J].高校地质学报, 2009, 15(3):351-357. QI Peng, ZHANG Junxia. Research status of extensional faultpropagation folding[J]. Geological Journal of China Universities, 2009, 15(3):351-357.
[1] XUE Luo, SHI Zhongsheng, MA Lun, ZHAO Yanjun, YUE Shijun, HONG Liang, WANG Lei, LEI Ming. Hydrocarbon accumulation models and exploration potential of MesoCenozoic heavy oil in northern Melut Basin，South Sudan [J]. Lithologic Reservoirs, 2023, 35(3): 76-85.
[2] DU Jiangmin, LIU Boyuan, ZHANG Yi, JIA Zhiwei, FU Jiyou, LONG Pengyu, LUO Jinyang, SHENG Jun. Characteristics and accumulation model of typical dolomite reservoirs in China [J]. Lithologic Reservoirs, 2023, 35(3): 86-98.
[3] LIU Zhongquan, ZHAO Leqiang, ZENG Zhiping, TIAN Jijun, LI Zhengqiang, LUO Jinchang, HU Meiling. Shale oil accumulation conditions of Permian Lucaogou Formation in Fukang fault zone，Junggar Basin [J]. Lithologic Reservoirs, 2023, 35(3): 126-137.
[4] XU Zhuang, SHI Wanzhong, WANG Ren, LUO Fusong, XIA Yongtao, QIN Shuo, ZHANG Xiao. Hydrocarbon accumulation law and model of Cretaceous clastic rocks in western Tabei uplift [J]. Lithologic Reservoirs, 2023, 35(2): 31-46.
[5] LI Guoxin, SHI Yajun, ZHANG Yongshu, CHEN Yan, ZHANG Guoqing, LEI Tao. New progress and enlightenment of oil and gas exploration and geological understanding in Qaidam Basin [J]. Lithologic Reservoirs, 2022, 34(6): 1-18.
[6] SUI Liwei, YANG Wenlu, LI Junhui, FAN Xiaodong, JIANG Hongfu, WEN Quan, ZHANG Dazhi, YUAN Yong. Sedimentary characteristics and reservoir control of beach bar in faulted lake basin:A case study of Cretaceous Tongbomiao Formation in Tanan Sag [J]. Lithologic Reservoirs, 2022, 34(5): 100-109.
[7] WANG Maozhen, WU Kui, GUO Tao, HUI Guanzhou, HAO Yiwei. Reservoir characteristics and controlling factors of the second member of Paleogene Shahejie Formation in southeastern margin of Liaodong Sag [J]. Lithologic Reservoirs, 2022, 34(4): 66-78.
[8] ZHOU Donghong, TAN Huihuang, ZHANG Shengqiang. Seismic description technologies of Neogene composite channel sand bodies in Kenli 6-1 oilfield,Bohai Sea [J]. Lithologic Reservoirs, 2022, 34(4): 13-21.
[9] NIU Chengmin, DU Xiaofeng, WANG Qiming, ZHANG Can, DING Yiran. Formation conditions and exploration direction of large-scale lithologic reservoirs of Cenozoic in Bohai Sea [J]. Lithologic Reservoirs, 2022, 34(3): 1-14.
[10] MA Zhengwu, GUAN Dayong, WANG Qiming, LIU Yaojun, LI Xiaohui. Sedimentary characteristics and controlling factors of sublacustrine fans of the third member of Paleogene Dongying Formation in Liaozhong Sag [J]. Lithologic Reservoirs, 2022, 34(2): 131-140.
[11] ZHU Zhiliang, GAO Xiaoming. Main controlling factors and models of Jurassic coalbed methane accumulation in Longdong coalfield [J]. Lithologic Reservoirs, 2022, 34(1): 86-94.
[12] WANG Qiao, SONG Lixin, HAN Yajie, ZHAO Huimin, LIU Ying. Depositional system and sequence stratigraphy of the third member of Paleo-gene Shahejie Formation in Leijia area, Western Liaohe Depression [J]. Lithologic Reservoirs, 2021, 33(6): 102-113.
[13] DU Jiangmin, LONG Pengyu, QIN Yingmin, ZHANG Tong, MA Hongyu, SHENG Jun. Characteristics and accumulation model of Oligocene E32 reservoir in Yingxi area,Qaidam Basin [J]. Lithologic Reservoirs, 2021, 33(5): 1-10.
[14] LUO Haoyu, CHEN Jun, ZHANG Xueqi, MENG Xiangxia, ZHAO Fengquan, WU Shaojun, GUO Xuan. Sedimentary characteristics of fluvial dominated shallow water delta front and its control on lithologic reservoir: A case study of Baxigai Formation in south slope of Kuqa Depression [J]. Lithologic Reservoirs, 2021, 33(5): 70-80.
[15] LI Xiang, WANG Jiangong, LI Fei, WANG Yulin, WU Kunyu, LI Yafeng, LI Xianming. Sedimentary characteristics of Eocene lacustrine microbialites in western Qaidam Basin: A case study from Xiaganchaigou Formation in Xichagou and Liangdong areas [J]. Lithologic Reservoirs, 2021, 33(3): 63-73.
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