南海北部北部湾盆地油气藏形成条件

摘要/Abstract

摘要： 位于南海北部大陆边缘的北部湾盆地以拉张裂陷为主，形成了具有典型断坳双层结构的断陷裂谷盆地，并控制了盆地内“先陆后海”型沉积充填序列。盆地内新生界油藏具有大面积生成、分布、富集并连片成藏的特点，又在不同层位和空间上聚散不一，呈现出复杂的变化格局。通过对北部湾盆地构造、沉积、成藏条件的系统分析和勘探开发实践的思考总结，认为富生烃凹陷决定了大中型油气藏的存在，富生烃凹陷内的大型沉积相带与有利构造单元的空间匹配，控制了大中型油气藏的分布。“先断后坳”、“先陆后海”的构造—沉积演化过程是大中型油气藏形成的根本因素。

关键词: 南海北部, 北部湾盆地, 成藏条件, 大中型油气藏, 油气分布

Abstract: The Beibu-gulf Basin in the northern continental margin of South China Sea is dominated by extensional rifts, which facilitated the formation of depression-rift basin with typical double-layer (rift-depression) structure and controlled the sedimentary sequence of “marine sediment after continental sediment” in this basin. The Cenozoic reservoirs in this basin were generated, distributed, enriched and contiguously accumulated in large scales, and present a complex framework with diverse horizontal and spatial distributions. In this paper, the structural, sedimentary and hydrocarbon accumulation conditions in the Beibu-gulf Basin were systematically analyzed, and the exploration and development practices were also reviewed. It is concluded that the existence of large-medium reservoirs is controlled by the hydrocarbon-rich sags, and the distribution of such reservoirs is controlled by the spatial matching between large sedimentary facies belts and favorable tectonic units in the hydrocarbon-rich sags. The tectonic-sedimentary evolution process of “depression after rifting” and “marine sediment after continental sediment” is essential for the formation of large-medium reservoirs.

Key words: northern South China Sea, Beibu-gulf Basin, hydrocarbon accumulation conditions, large-medium reservoirs, oil and gas distribution

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.

Yang Xibing. Hydrocarbon accumulation conditions in Beibu-gulf Basin,northern South China Sea[J]. China Petroleum Exploration, 2016, 21(4): 85-92.

参考文献

[1] 金之钧. 中国大中型油气田的结构及分布规律[J]. 新疆石油地质，2008,29(3):385-388. Jin Zhijun. Distribution and structures of large and medium oil-gas fields in China[J]. Xinjiang Petroleum Geology, 2008,29(3):385-388.
[2] 龚再升，李思田，谢泰俊，等. 南海北部大陆边缘盆地分析与油气聚集[M]. 北京：科学出版社，1997:63-126. Gong Zaisheng, Li Sitian, Xie Taijun, et al. Continental margin basin analysis and hydrocarbon accumulation of the northern South China Sea[M]. Beijing: Sceince Press, 1997:63-126.
[3] 何家雄，刘海龄，姚永坚，等. 南海北部边缘盆地油气地质及资源前景[M].北京：石油工业出版社，2008:1-185. He Jiaxiong, Liu Hailing, Yao Yongjian, et al. Northern South China Sea marginal basin geology and resources of oil and gas prospects[M]. Beijing: Petroleum Industry Press, 2008:1-185.
[4] 何家雄，吴文海，祝有海，等. 南海北部边缘盆地油气成因及运聚规律与勘探方向[J]. 天然气地球科学，2010,21(1):7-17. He Jiaxiong, Wu Wenhai, Zhu Youhai, et al. Genetic types, migration and accumulation of oil & gas and exploration proposal in north marginal basin, South China Sea[J]. Natural Gas Geoscience, 2010,21(1):7-17.
[5] 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. Characteristics of fault structure and its control on hydrocarbons in the Beibuwan Basin[J]. Acta Petrolei Sinica, 2012,33(2):195-203.
[6] 徐建永，张功成，梁建设，等. 北部湾盆地古近纪幕式断陷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.
[7] 徐行，何家雄，何丽娟，等. 南海北部与南部新生代沉积盆地热流分布与油气运聚富集关系[J]. 海洋地质与第四纪地质，2011,31(6):99-108. Xu Hang, He Jiaxiong, He Lijuan, et al. Distribution of heat flow in Cenozoic basins of South China Sea and its connection with oil and gas migration and accumulation[J]. Marine Geology & Quaternary Geology, 2011,31(6):99-108.
[8] 吴世敏，丘学林，周蒂. 南海西缘新生代沉积盆地形成动力学探讨[J].大地构造与成矿学，2005,29(3):346-353. Wu Shimin, Qiu Xuelin, Zhou Di. Formation mechanism for basins on the western margin of South China Sea[J].Geotectonica Et Metallogenia, 2005,29(3):346-353.
[9] 闫义，夏斌，林舸，等. 南海北缘新生代盆地沉积与构造演化及地球动力学背景[J]. 海洋地质与第四纪地质，2005,25(2):53-61. Yan Yi, Xia Bin, Lin Ge, et al. The sedimentary and tectonic evolution of the basins in the north margin of South China Sea and geodynamic setting[J]. Marine Geology & Quaternary Geology, 2005,25(2):53-61.
[10] 夏斌，崔学军，谢建华，等. 关于南海构造演化动力学机制研究的一点思考[J]. 大地构造与成矿学，2004,28(3):221-227. Xia Bin, Cui Xuejun, Xie Jianhua, et al. Thinking about the dynamics mechanism study on formation and evolution of South China Sea[J]. Geotectonica Et Metallogenia, 2004,28(3):221-227.
[11] 林长松，初凤友，高金耀，等. 论南海新生代的构造运动[J]. 海洋学报，2007,29(4):88-96. Lin Changsong, Chu Fengyou, Gao Jinyao, et al. On tectonic movement in the South China Sea during the Cenozoic[J]. Acta Oceanologica Sinica, 2007,29(4):88-96.
[12] 张智武，刘志峰，张功成，等. 北部湾盆地裂陷期构造及演化特征[J].石油天然气学报，2013,35(1):6-9. Zhang Zhiwu, Liu Zhifeng, Zhang Gongcheng, et al. The chasmic stage and structural evolution features of Beibuwan basin[J]. Journal of Oil and Gas Technology, 2013,35(1):6-9.
[13] 杨海长，梁建设，胡望水. 乌石凹陷构造特征及其对油气成藏的影响[J]. 西南石油大学学报：自然科学版，2011,33(3):41-46. Yang Haizhang, LiangJianshe, Hu Wangshui. Structural features and impacts on hydrocarbon accumulation in Wushi sag[J]. Journal of Southwest Petroleum University: Earth Science Edition, 2011,33(3):41-46.
[14] 谢锦龙，黄冲，向峰云. 南海西部海域新生代构造古地理演化及其对油气勘探的意义[J]. 地质科学，2008,43(1):133-153. Xie Jinlong, Huang Chong, Xiang Fengyun. Evolution of Cenozoic tectono - palaeogeography and its petroleum significance in the western South China Sea[J]. Chinese Journal of Geology, 2008,43(1):133-153.
[15] 刘明全. 北部湾盆地天然气成藏系统构想[J]. 中国海上油气，2004,16(2):93-97. Liu Mingquan. The assumed gas accumulation systems in Beibuwan Basin[J]. China Offshore Oil and Gas, 2004,16(2):93-97.
[16] 廖飞燕，马庆林，孙新销，等. 北部湾盆地福山凹陷古近系流沙港组岩性油气藏勘探[J].中国石油勘探，2015,20(2):43-50. Liao Feiyan, Ma Qinglin, Sun Xinxiao, et al. Study of Lithologic Reservoir of Paleogene Liushagang Formation in Fushan Depression of Beibu Bay Basin[J]. China Petroleum Exploration, 2015,20(2):43-50.
[17] 朱伟林.中国近海新生代含油气盆地古湖泊学与烃源条件[M]. 北京：地质出版社，2009:122-134. Zhu Weilin. Paleolimnology and source rock studies of Cenozoic hydrocarbon-bearing basin in China[M]. Beijing: Geological Publishing House, 2009:122-134.
[18] 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.
[19] 张功成，李友川，刘世翔，等. “源热共控”中国海油气田“近岸油、远岸气”有序分布[J]. 中国石油勘探，2014,19(5):1-22. Zhang Gongcheng, Li Youchuan, Liu Shixiang, et al.“Co-control of source rock and heat” in orderly distribution of “near-shore oil and Far-shore gas” in China’s offshore and adjacent area[J].China Petroleum Exploration, 2014,19(5): 1-22.