Types, genesis, and formation of CO<sub>2</sub>-rich reservoirs in the Yangjiangdong Sag, Pearl River Mouth Basin

MA Ning; XIONG Wanlin; LONG Zulie; ZHU Junzhang; WEN Huahua; YANG Xingye; WANG Xiaomeng

doi:10.16562/j.cnki.0256-1492.2022062201

2023 Vol. 43, No. 1

Article Contents

Article navigation > Marine Geology & Quaternary Geology > 2023 > 43(1): 118-127

Next Article Previous Article

MA Ning, XIONG Wanlin, LONG Zulie, ZHU Junzhang, WEN Huahua, YANG Xingye, WANG Xiaomeng. Types, genesis, and formation of CO2-rich reservoirs in the Yangjiangdong Sag, Pearl River Mouth Basin[J]. Marine Geology & Quaternary Geology, 2023, 43(1): 118-127. doi: 10.16562/j.cnki.0256-1492.2022062201

Citation:

MA Ning, XIONG Wanlin, LONG Zulie, ZHU Junzhang, WEN Huahua, YANG Xingye, WANG Xiaomeng. Types, genesis, and formation of CO₂-rich reservoirs in the Yangjiangdong Sag, Pearl River Mouth Basin[J]. Marine Geology & Quaternary Geology, 2023, 43(1): 118-127. doi: 10.16562/j.cnki.0256-1492.2022062201

Types, genesis, and formation of CO₂-rich reservoirs in the Yangjiangdong Sag, Pearl River Mouth Basin

Shenzhen Branch of CNOOC Ltd, Shenzhen 518067, China

Received Date: 22 June 2022

Revised Date: 11 July 2022

Accepted Date: 11 July 2022

Publish Date: 28 February 2023

Abstract

Abstract

By studying the composition of the fluid wells, P-T phase diagram, crude oil biomarkers, natural gas components, isotopes and fluid inclusions of high CO₂ oil and gas reservoirs in the Yangjiangdong Sag, the types, genesis, and formation of CO₂-rich reservoirs were analyzed. Results show that the CO₂-rich reservoirs could be divided into three types: i.e., conventional reservoir with CO₂ -dissolved gas, volatile reservoir with high CO₂ dissolved gas, and CO₂ gas reservoirs containing dissolved hydrocarbons. The crude oil in the reservoir is mainly originated from shallow–semi-deep lake facies and semi-deep–deep lake facies in the mature stage. The hydrocarbon gas is crude oil associated, and CO₂ belongs to mantle-derived inorganic gas. The charging period in EP20-A well is 12～10.7 Ma, and that of CO₂ is 5.6～1.7 Ma. Two stages of crude oil charging and two stages of CO₂ charging in EP20-C well were recognized. The first stage of crude oil charging is 14～6 Ma, which is the main charging period; and the second stage is 4～0 Ma. The first stage of CO₂ charging period is 11～10 Ma, and the second is 5 ～1.5 Ma. The relative magnitude of CO₂ charging intensity show that the CO₂ gas reservoir containing dissolved hydrocarbon was formed in well EP20-C, volatile reservoir containing CO₂ dissolved gas was formed in well EP20-A, and conventional reservoir containing CO₂ dissolved gas was formed in well EP20-B.
- CO₂-rich reservoirs /
- fluid type /
- origin of oil and gas /
- pool-forming process /
- the Yangjiangdong Sag

FullText(HTML)

References

[1]	何家雄, 祝有海, 黄霞, 等. 南海北部边缘盆地不同类型非生物成因CO₂成因成藏机制及控制因素[J]. 天然气地球科学, 2011, 22(6):935-942 Google Scholar HE Jiaxiong, ZHU Youhai, HUANG Xia, et al. Accumulated mechanisms for different genetic types of non-biological CO₂ and controlling factors in north marginal basins, South China Sea [J]. Natural Gas Geoscience, 2011, 22(6): 935-942. Google Scholar
[2]	何家雄, 祝有海, 崔莎莎, 等. 南海北部边缘盆地CO₂成因及运聚规律与资源化利用思路[J]. 天然气地球科学, 2009, 20(4):488-496 Google Scholar HE Jiaxiong, ZHU Youhai, CUI Shasha, et al. Origin, migration and accumulation of CO₂ and its resource utilization in marginal basin, northern South China Sea [J]. Natural Gas Geoscience, 2009, 20(4): 488-496. Google Scholar
[3]	何家雄, 马文宏, 陈胜红, 等. 南海北部边缘盆地非烃气分布及形成的地质条件与控制因素[J]. 海洋地质与第四纪地质, 2011, 31(2):95-104 Google Scholar HE Jiaxiong, MA Wenhong, CHEN Shenghong, et al. Non-hydrocarbon gas distribution and its geological conditions and controlling factors in the marginal basin of northern South China Sea [J]. Marine Geology & Quaternary Geology, 2011, 31(2): 95-104. Google Scholar
[4]	向凤典. 珠江口盆地(东部)的CO₂气藏及其对油气聚集的影响[J]. 中国海上油气:地质, 1994(3):13-20 Google Scholar XIANG Fengdian. Carbon dioxide reservoir and its significance to hydrocarbon accumulation in eastern Pearl River Mouth Basin [J]. China Offshore Oil and Gas:Geology, 1994(3): 13-20. Google Scholar
[5]	张向涛, 彭光荣, 朱定伟, 等. 珠江口盆地恩平凹陷CO₂成藏特征与成藏过程[J]. 大地构造与成矿学, 2021, 45(1):211-218 Google Scholar ZHANG Xiangtao, PENG Guangrong, ZHU Dingwei, et al. Characteristics and processes of CO₂ accumulation in the Enping Sag, Pearl River Mouth Basin [J]. Geotectonica et Metallogenia, 2021, 45(1): 211-218. Google Scholar
[6]	熊万林, 朱俊章, 杨兴业, 等. 恩平凹陷北部隆起构造带油气成因来源及成藏过程研究[J]. 中国海上油气, 2020, 32(1):54-65 Google Scholar XIONG Wanlin, ZHU Junzhang, YANG Xingye, et al. Study on the genetic sources and accumulation processes of oil and gas in the north uplift structural belt of Enping Sag [J]. China Offshore Oil and Gas, 2020, 32(1): 54-65. Google Scholar
[7]	何家雄, 夏斌, 刘宝明, 等. 中国东部及近海陆架盆地CO₂成因及运聚规律与控制因素研究[J]. 石油勘探与开发, 2005, 32(4):42-49 doi: 10.3321/j.issn:1000-0747.2005.04.007 CrossRef Google Scholar HE Jiaxiong, XIA Bin, LIU Baoming, et al. Origin, migration and accumulation of CO₂ in East China and offshore shelf basins [J]. Petroleum Exploration and Development, 2005, 32(4): 42-49. doi: 10.3321/j.issn:1000-0747.2005.04.007 CrossRef Google Scholar
[8]	王振峰, 何家雄, 裴秋波. 莺-琼盆地和珠江口盆地西部CO₂成因及运聚分布特征[J]. 中国海上油气(地质), 2003(5):293-297 Google Scholar WANG Zhenfeng, HE Jiaxiong, PEI Qiubo. The origin and migration-accumulation features of CO₂ in Ying-Qiong basin and the western Pearl River Mouth Basin [J]. China Offshore Oil and Gas (Geology), 2003(5): 293-297. Google Scholar
[9]	王振峰, 何家雄, 张树林, 等. 南海北部边缘盆地CO₂成因及充注驱油的石油地质意义[J]. 石油学报, 2004, 25(5):48-53 doi: 10.3321/j.issn:0253-2697.2004.05.010 CrossRef Google Scholar WANG Zhenfeng, HE Jiaxiong, ZHANG Shulin, et al. Genesis of carbon dioxide and geological significance for carbon dioxide infilling and oil displacement in the northern marginal basin of South China Sea [J]. Acta Petrolei Sinica, 2004, 25(5): 48-53. doi: 10.3321/j.issn:0253-2697.2004.05.010 CrossRef Google Scholar
[10]	陈红汉, 米立军, 刘妍鷨, 等. 珠江口盆地深水区CO₂成因、分布规律与风险带预测[J]. 石油学报, 2017, 38(2):119-134 doi: 10.7623/syxb201702001 CrossRef Google Scholar CHEN Honghan, MI Lijun, LIU Yanhua, et al. Genesis, distribution and risk belt prediction of CO₂ in deep-water area in the Pearl River Mouth Basin [J]. Acta Petrolei Sinica, 2017, 38(2): 119-134. doi: 10.7623/syxb201702001 CrossRef Google Scholar
[11]	雷川, 罗静兰, 马永坤, 等. 珠江口盆地白云凹陷及其周缘CO₂分布与控制因素分析与启示[J]. 矿物岩石, 2017, 37(3):97-106 Google Scholar LEI Chuan, LUO Jinglan, MA Yongkun, et al. Distribution of carbon dioxide in Baiyun Sag and its periphery, Pearl River Mouth Basin [J]. Journal of Mineralogy and Petrology, 2017, 37(3): 97-106. Google Scholar
[12]	刘妍鷨, 陈红汉, 王艳飞, 等. 珠江口盆地白云-荔湾深水区幔源CO₂充注的黏土矿物成岩响应[J]. 地质科技通报, 2021, 40(3):85-95 Google Scholar LIU Yanhua, CHEN Honghan, WANG Yanfei, et al. Diagenetic effect of mantle-derived CO₂ charge to clay minerals in the Baiyun-Liwan deepwater area of the Pearl River Mouth Basin in South China Sea [J]. Bulletin of Geological Science and Technology, 2021, 40(3): 85-95. Google Scholar
[13]	彭光荣, 张向涛, 许新明, 等. 南海北部珠江口盆地阳江凹陷油气勘探重要发现与认识[J]. 中国石油勘探, 2019, 24(3):267-279 doi: 10.3969/j.issn.1672-7703.2019.03.001 CrossRef Google Scholar PENG Guangrong, ZHANG Xiangtao, XU Xinming, et al. Important discoveries and understandings of oil and gas exploration in Yangjiang Sag of the Pearl River Mouth Basin, northern South China Sea [J]. China Petroleum Exploration, 2019, 24(3): 267-279. doi: 10.3969/j.issn.1672-7703.2019.03.001 CrossRef Google Scholar
[14]	田立新, 张向涛, 彭光荣, 等. 珠江口盆地阳江凹陷石油地质特征及成藏主控因素[J]. 中国海上油气, 2020, 32(1):13-22 Google Scholar TIAN Lixin, ZHANG Xiangtao, PENG Guangrong, et al. Petroleum geological characteristics and main controlling factors of the Yangjiang Sag in Pearl River Mouth Basin [J]. China Offshore Oil and Gas, 2020, 32(1): 13-22. Google Scholar
[15]	熊万林, 龙祖烈, 朱俊章, 等. 阳江凹陷恩平21洼不同沉积环境烃源岩发育特征及成藏贡献[J]. 油气地质与采收率, 2021, 28(5):50-56 doi: 10.13673/j.cnki.cn37-1359/te.2021.05.005 CrossRef Google Scholar XIONG Wanlin, LONG Zulie, ZHU Junzhang, et al. Development characteristics and accumulation contribution of source rocks in different sedimentary environments in Enping 21 Subsag of Yangjiang Sag [J]. Petroleum Geology and Recovery Efficiency, 2021, 28(5): 50-56. doi: 10.13673/j.cnki.cn37-1359/te.2021.05.005 CrossRef Google Scholar
[16]	赵健, 赵俊峰, 任康绪, 等. 巴西桑托斯盆地高含CO₂油气藏类型、特征及成因模式[J]. 吉林大学学报:地球科学版, 2021, 51(6):1654-1664 Google Scholar ZHAO Jian, ZHAO Junfeng, REN Kangxu, et al. Main types, characteristics and genetic model of oil & gas reservoirs with high CO₂ content in Santos Basin, Brazil [J]. Journal of Jilin University:Earth Science Edition, 2021, 51(6): 1654-1664. Google Scholar
[17]	国家能源部. SY/T 5542-2009 油气藏流体物性分析方法[S]. 北京: 石油工业出版社, 2010. Google Scholar National Energy Administration. SY/T 5542-2009 Test method for reservoir fluid physical properties[S]. Beijing: Petroleum Industry Press, 2010. Google Scholar
[18]	戴金星, 宋岩, 洪峰, 等. 中国东部无机成因的二氧化碳气藏及其特征[J]. 中国海上油气(地质), 1994, 8(4):215-222 Google Scholar DAI Jinxiong, SONG Yan, HONG Feng, et al. Inorganic genetic carbon dioxide gas accumulations and their characteristics in east part of China [J]. China Offshore Oil and Gas (Geology), 1994, 8(4): 215-222. Google Scholar
[19]	李友川, 陶维祥, 孙玉梅, 等. 珠江口盆地惠州凹陷及其邻区原油分类和分布特征[J]. 石油学报, 2009, 30(6):830-834,842 doi: 10.3321/j.issn:0253-2697.2009.06.006 CrossRef Google Scholar LI Youchuan, TAO Weixiang, SUN Yumei, et al. Classification and distribution of oil in Huizhou Depression of Pearl River Mouth Basin [J]. Acta Petrolei Sinica, 2009, 30(6): 830-834,842. doi: 10.3321/j.issn:0253-2697.2009.06.006 CrossRef Google Scholar
[20]	卢晓林, 石宁, 李美俊, 等. 珠江口盆地白云凹陷原油双杜松烷分布特征及地球化学意义[J]. 石油实验地质, 2019, 41(4):560-568 doi: 10.11781/sysydz201904560 CrossRef Google Scholar LU Xiaolin, SHI Ning, LI Meijun, et al. Distribution patterns and geochemical implication of bicadinanes in crude oils from Baiyun Sag, Pearl River Mouth Basin [J]. Petroleum Geology & Experiment, 2019, 41(4): 560-568. doi: 10.11781/sysydz201904560 CrossRef Google Scholar
[21]	张向涛, 朱俊章, 熊万林, 等. 番禺4洼文昌组烃源岩生物标志化合物特征与油源判识[J]. 中国海上油气, 2020, 32(4):12-23 Google Scholar ZHANG Xiangtao, ZHU Junzhang, XIONG Wanlin, et al. Biomarker characteristics and oil-source discrimination of source rocks in Wenchang Formation of Panyu 4 Sag [J]. China Offshore Oil and Gas, 2020, 32(4): 12-23. Google Scholar
[22]	Peters K E, Moldowan J M. The Biomarker Guide: Interpreting Molecular Fossils in Petroleum and Ancient Sediments[M]. Englewood: Prentice Hall, 1993. Google Scholar
[23]	戴金星. 各类天然气的成因鉴别[J]. 中国海上油气(地质), 1992, 6(1):11-19 Google Scholar DAI Jinxing. Identification of various genetic natural gases [J]. China Offshore Oil and Gas (Geology), 1992, 6(1): 11-19. Google Scholar