琼东南盆地深水区东段崖城组沉积特征及对海相烃源岩的控制

doi:10.7623/syxb2019S2006

石油学报 ›› 2019, Vol. 40 ›› Issue (S2): 57-66.DOI: 10.7623/syxb2019S2006

琼东南盆地深水区东段崖城组沉积特征及对海相烃源岩的控制

孙瑞¹, 韩银学², 曾清波¹, 王夏阳³, 张功成¹, 赵志刚¹, 杨海长¹, 姚兴宗⁴

1. 中海油研究总院有限责任公司北京 100028;
2. 咸阳泰和石油工程有限公司陕西咸阳 710000;
3. 中国石油勘探开发研究院北京 100083;
4. 西北大学陕西西安 710069

收稿日期:2019-10-12 修回日期:2019-10-12 出版日期:2019-12-25 发布日期:2020-04-24
通讯作者: 张功成,男,1966年1月生,1988年获西北大学学士学位,1994年获中国地质大学(北京)博士学位,现为中国海洋石油集团有限公司勘探专家、教授级高级工程师,主要从事海洋油气地质学研究。Email:zhanggch@cnooc.com.cn
作者简介:孙瑞,男,1987年11月生,2012年获西南石油大学学士学位,2015年获中国石油大学(北京)硕士学位,现为中海油研究总院有限责任公司工程师,主要从事油气藏形成与分布规律研究。Email:sunrui7@cnooc.com.cn
基金资助:
国家科技重大专项（2008ZX05025、2011ZX05025、2016ZX05026）、国家重点基础研究发展计划（973）项目（2009CB219400）、国土资源部"全国油气资源战略选区调查评价项目"（XQ2004-05）和国土资源部"南海北部陆坡深水海域油气资源战略调查及评价项目"（XQ2007-05）资助。

Sedimentary characteristics of Yacheng Formation in the eastern deepwater area in Q iongdongnan Basin and their control on marine source rocks

Sun Rui¹, Han Yinxue², Zeng Qingbo¹, Wang Xiayang³, Zhang Gongcheng¹, Zhao Zhigang¹, Yang Haizhang¹, Yao Xingzong⁴

1. CNOOC Research Institute Company Limited, Beijing 100028, China;
2. Xianyang Taihe Petroleum Engineering Co., Ltd., Shaanxi Xianyang 710000, China;
3. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China;
4. Northwest University, Shaanxi Xi'an 710069, China

Received:2019-10-12 Revised:2019-10-12 Online:2019-12-25 Published:2020-04-24

摘要/Abstract

摘要：

崖城组是琼东南盆地的主力生烃层系。根据古生物、岩性以及古构造、古地貌等资料，系统分析了琼东南盆地深水区东段崖城组的沉积环境与沉积相，在此基础上对海相烃源岩的发育条件进行了分析。结果表明，崖城组沉积时期，琼东南盆地深水区东段为半封闭的海湾环境，松南—宝岛—长昌凹陷发育广泛的滨浅海沉积，凹陷边缘发育多个小规模的近源扇三角洲、三角洲，海岸平原分布在凹陷带周缘沉积古地貌较高的部位。受控于沉积环境，煤系烃源岩主要发育在凹陷周缘海岸平原相及扇三角洲、三角洲相的水上平原部分，陆源有机质为主的海相泥岩是凹陷内部的主力烃源岩，陆源有机质供给量和相对安静的水体环境是海相烃源岩发育的两个主要控制因素。采用类比分析方法，在琼东南盆地深水区东段崖城组识别出9个潜在海相烃源岩发育区，其中5个为最有利的烃源岩发育区。

关键词: 海相烃源岩, 半封闭海湾, 陆源有机质, 崖城组, 琼东南盆地

Abstract:

Yacheng Formation is the main hydrocarbon-generating series of strata in Qiongdongnan Basin. Based on the data of paleontology, lithology, paleostructure and paleomorphology, this paper systematically analyzes the sedimentary environment and sedimentary facies of Yacheng Formation in the eastern deepwater area in Qiongdongnan Basin, and futher analyzes the development conditions of marine source rocks. The results show that during the sedimentary period of the Yacheng Formation, the eastern deepwater area in Qiongdongnan Basin was a semi-enclosed bay, where extensive coastal shallow sea sediments were developed in Songnan, Baodao, and Changchang sags; multiple small-scale near-source fan deltas and deltas were developed in the margin of sags; coastal plains were distributed in areas with the high site of sedimentary ancient landform at the periphery of sags. Controlled by the sedimentary environment, coal-bearing source rocks are mainly developed in the coastal plain and the offshore plain with fan-deltas and delta facies in the periphery of sags. Marine mudstones dominated by terrestrial organic matter are the main source rocks in the sags. Supply of terrestrial organic matter and a relatively quiet water environment are the two main controlling factors for the development of marine source rocks. Based on analogy analysis, 9 potential development areas of marine source rocks were identified in Yacheng Formation in the eastern deepwater area in Qiongdongnan Basin, of which 5 are the most favorable development areas of source rocks.

Key words: marine source rocks, semi-enclosed bay, terrestrial organic matter, Yacheng Formation, Qiongdongnan Basin

中图分类号:

TE122.2

孙瑞, 韩银学, 曾清波, 王夏阳, 张功成, 赵志刚, 杨海长, 姚兴宗. 琼东南盆地深水区东段崖城组沉积特征及对海相烃源岩的控制[J]. 石油学报, 2019, 40(S2): 57-66.

Sun Rui, Han Yinxue, Zeng Qingbo, Wang Xiayang, Zhang Gongcheng, Zhao Zhigang, Yang Haizhang, Yao Xingzong. Sedimentary characteristics of Yacheng Formation in the eastern deepwater area in Q iongdongnan Basin and their control on marine source rocks[J]. Acta Petrolei Sinica, 2019, 40(S2): 57-66.

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琼东南盆地深水区东段崖城组沉积特征及对海相烃源岩的控制

Sedimentary characteristics of Yacheng Formation in the eastern deepwater area in Q iongdongnan Basin and their control on marine source rocks

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