Sedimentary system and depositional model of the Second Member of the Liushagang Formation in Haizhong Sag in Beibuwan Basin

YAO Tianxing; QU Hongjun; HUANG Suwei; FENG Congjun; WU Longfa; YAO Xingzong

doi:10.16028/j.1009-2722.2022.236

2023 Vol. 39, No. 11

Article Contents

Article navigation > Marine Geology Frontiers > 2023 > 39(11): 50-62

Next Article Previous Article

YAO Tianxing, QU Hongjun, HUANG Suwei, FENG Congjun, WU Longfa, YAO Xingzong. Sedimentary system and depositional model of the Second Member of the Liushagang Formation in Haizhong Sag in Beibuwan Basin[J]. Marine Geology Frontiers, 2023, 39(11): 50-62. doi: 10.16028/j.1009-2722.2022.236

Citation:

YAO Tianxing, QU Hongjun, HUANG Suwei, FENG Congjun, WU Longfa, YAO Xingzong. Sedimentary system and depositional model of the Second Member of the Liushagang Formation in Haizhong Sag in Beibuwan Basin[J]. Marine Geology Frontiers, 2023, 39(11): 50-62. doi: 10.16028/j.1009-2722.2022.236

Sedimentary system and depositional model of the Second Member of the Liushagang Formation in Haizhong Sag in Beibuwan Basin

1.
State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China
2.
Institute of Exploration and Development, SINOPEC Shanghai Offshore Oil & Gas Company, Shanghai 200120, China

More Information

Corresponding author: QU Hongjun, hongjun@nwu.edu.cn

Received Date: 30 August 2022

Publish Date: 28 November 2023

Abstract

Abstract

The Weixinan Depression in the northern part of the Beibuwan Basin has achieved serial breakthroughs with high-yield oil and gas flows in many wells; the main source rock series is the Eocene Second Member of Liushagang Formation (the Liu 2 Member for short). However, there is no commercial oil and gas discovery in Haizhong Sag that is adjacent to the south of the Weixinan Depression. Not only deep and semi-deep lacustrine source rocks but also sub-lacustrine fan reservoirs were developed in the main source rock series of the Liu 2 Member. Therefore, it is of guiding significance for future exploration and development to study the development law of the sedimentary system on the potential hydrocarbon generation series (source rocks and sub-lacustrine fan reservoirs) in the Haizhong Depression. Based on the high-precision 3D seismic data and logging data, we discussed the development law of sedimentary system and established sedimentary model in the Liu 2 Member through comprehensive analysis on core facies, logging facies, seismic facies, and seismic attributes, and then established a depositional model. The results show that four types of sedimentary systems were developed in the Liu 2 Member, which are shore-shallow lake, deep and semi-deep lacustrine, sub-lacustrine fan, and braided river delta. Under the control of the half-graben structural pattern, which is steep in the north and gentle in the south, the deep and semi-deep lacustrine facies were developed in the northern steep slope zone and the sag zone, where sub-lacustrine fans were also developed at the western and eastern sub-sags with the provenances in the north and east directions. Also, the shore-shallow lacustrine facies and the braided river delta front facies were developed in the southern gentle slope shallow water zone. The good source rocks of the Liu 2 Member in the Haizhong Ssg were mainly developed at the first transgressive surface (TS), and the sub-lacustrine fan facies was mainly developed in the transgressive systems tract (TST), which reflects that the development degree of source rocks controlled by tectonic subsidence factor is stronger than that of lake-level change factor at the background of faulted lake basin. This study provided research ideas for establishing sequence position and symbiotic model between deep and semi-deep lacustrine source rocks and sub-lacustrine fan reservoirs in half-graben faulted lake basins.
- Beibuwan Basin /
- Haizhong Sag /
- Second Member of the Liushagang Formation (Liu 2 Member) /
- sedimentary system /
- depositional model

FullText(HTML)

References

[1]	李凡异,张厚和,李春荣,等. 北部湾盆地海域油气勘探历程与启示[J]. 新疆石油地质,2021,42(3):337-345. Google Scholar
[2]	谢玉洪,高阳东. 中国海油近期国内勘探进展与勘探方向[J]. 中国石油勘探,2020,25(1):20-30. doi: 10.3969/j.issn.1672-7703.2020.01.003 CrossRef Google Scholar
[3]	李友川,王柯,兰蕾. 北部湾盆地主要凹陷油气差异性及其控制因素[J]. 中国海上油气,2020,32(5):1-8. Google Scholar
[4]	范蕊,李水福,何生,等. 涠西南凹陷烃源岩地球化学特征及油源对比[J]. 石油实验地质,2014,36(2):238-244. doi: 10.11781/sysydz201402238 CrossRef Google Scholar
[5]	杨希冰,金秋月,胡林,等. 北部湾盆地涠西南凹陷原油成因类型及分布特征[J]. 西南石油大学学报(自然科学版),2019,41(3):51-60. Google Scholar
[6]	傅宁. 论4-甲基C₃₀甾烷丰度与烃源岩质量的关系:基于北部湾盆地勘探实践[J]. 中国海上油气,2018,30(5):11-20. Google Scholar
[7]	颜世永,李月,吴智平,等. 北部湾盆地海中凹陷与涠西南凹陷构造特征及成因机制[J]. 石油学报,2020,41(6):711-722. doi: 10.7623/syxb202006006 CrossRef Google Scholar
[8]	席敏红,张萍,沈传波,等. 北部湾盆地北部坳陷古近纪原型结构分析[J]. 海洋石油,2014,34(2):13-19. doi: 10.3969/j.issn.1008-2336.2014.02.013 CrossRef Google Scholar
[9]	李上卿,牛华伟,郑军,等. 北部湾盆地涠西南凹陷与海中凹陷古近纪沉积关系探讨[J]. 海洋石油,2012,32(1):1-6. doi: 10.3969/j.issn.1008-2336.2012.01.001 CrossRef Google Scholar
[10]	张强. 北部湾盆地北部坳陷古近系构造、沉积特征及其耦合关系研究[D]. 青岛: 中国石油大学（华东）, 2019. Google Scholar
[11]	张强,吴智平,颜世永,等. 北部湾盆地北部坳陷古近系构造发育特征及其对沉积的控制作用[J]. 高校地质学报,2018,24(6):787-799. doi: 10.16108/j.issn1006-7493.2018015 CrossRef Google Scholar
[12]	胡爱玉. 北部湾盆地海中凹陷地层特征地震识别研究[J]. 石油物探,2017,56(2):240-249. doi: 10.3969/j.issn.1000-1441.2017.02.011 CrossRef Google Scholar
[13]	郑军,葛翔. 北部湾盆地海中凹陷断层活动性及其对沉积的控制[J]. 海洋石油,2014,34(4):1-6. doi: 10.3969/j.issn.1008-2336.2014.04.001 CrossRef Google Scholar
[14]	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. doi: 10.11743/ogg20110615 CrossRef Google Scholar
[15]	李友川,兰蕾,王柯,等. 北部湾盆地流沙港组湖相烃源岩的差异[J]. 石油学报,2019,40(12):1451-1459. doi: 10.7623/syxb201912004 CrossRef Google Scholar
[16]	谢瑞永,黄保家,李旭红,等. 北部湾盆地涠西南凹陷流沙港组烃源岩生烃潜力评价[J]. 地质学刊,2014,38(4):670-675. doi: 10.3969/j.issn.1674-3636.2014.04.670 CrossRef Google Scholar
[17]	傅宁,林青,王柯. 北部湾盆地主要凹陷流沙港组二段主力烃源岩再评价[J]. 中国海上油气,2017,29(5):12-21. Google Scholar
[18]	王修平,李倩,陈晶. 北部湾盆地海中凹陷流体动力场特征及油气成藏意义[J]. 海洋石油,2017,37(3):1-6,28. doi: 10.3969/j.issn.1008-2336.2017.03.001 CrossRef Google Scholar
[19]	孙建峰,须雪豪,席敏红. 北部湾盆地海中凹陷油气成藏条件分析[J]. 海洋石油,2008,28(2):36-39. doi: 10.3969/j.issn.1008-2336.2008.02.006 CrossRef Google Scholar
[20]	张萍,郑军,席敏红,等. 北部湾盆地涠西南凹陷西南缘油气成藏条件及模式[J]. 石油实验地质,2015,37(2):157-163. doi: 10.11781/sysydz201502157 CrossRef Google Scholar
[21]	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. doi: 10.7623/syxb201202003 CrossRef Google Scholar
[22]	卢林,汪企浩,黄建军. 北部湾盆地涠西南和海中凹陷新生代局部构造演化史[J]. 海洋石油,2007,27(1):25-29,57. doi: 10.3969/j.issn.1008-2336.2007.01.005 CrossRef Google Scholar
[23]	李才,杨希冰,范彩伟,等. 北部湾盆地演化及局部构造成因机制研究[J]. 地质学报,2018,92(10):2028-2039. doi: 10.3969/j.issn.0001-5717.2018.10.005 CrossRef Google Scholar
[24]	刘一鸣,吴智平,颜世永,等. 中国近海裂陷盆地始新世构造变革的厘定及地质意义:以北部湾盆地涠西南凹陷为例[J]. 地球科学,2021,46(6):2145-2156. Google Scholar
[25]	朱伟林,吴国瑄,黎明碧. 南海北部陆架北部湾盆地古湖泊与烃源条件[J]. 海洋与湖沼,2004,35(1):8-14. doi: 10.3321/j.issn:0029-814X.2004.01.002 CrossRef Google Scholar
[26]	赵志刚,吴景富,李春荣. 北部湾盆地洼陷优选与油气分布[J]. 石油实验地质,2013,35(3):285-290,295. doi: 10.11781/sysydz201303285 CrossRef Google Scholar
[27]	席敏红余学兵黄建军. 涠西南凹陷(西部)古近系层序地层及沉积特征研究[J]. 海洋石油,2007,27(3):1-12. doi: 10.3969/j.issn.1008-2336.2007.03.001 CrossRef Google Scholar
[28]	杨希冰. 南海北部北部湾盆地油气藏形成条件[J]. 中国石油勘探,2016,21(4):85-92. doi: 10.3969/j.issn.1672-7703.2016.04.009 CrossRef Google Scholar
[29]	张佰涛,唐金炎,王文军,等. 北部湾盆地北部坳陷构造:沉积特征及其演化[J]. 海洋石油,2014,34(2):7-12. doi: 10.3969/j.issn.1008-2336.2014.02.007 CrossRef Google Scholar
[30]	马云,李三忠,刘鑫,等. 华南北部湾盆地的形成机制[J]. 吉林大学学报(地球科学版),2014,44(6):1727-1736. Google Scholar
[31]	孙晓猛,张旭庆,张功成,等. 南海北部新生代盆地基底结构及构造属性[J]. 中国科学(地球科学),2014,44(6):1312-1323. Google Scholar