南海西部深水区台缘结构、生物礁发育特征及控制因素分析

Structure of carbonate platform margin and characteristics of reef and their controlling factors in western deep-water region of South China Sea

陈雷 陆永潮 王振峰 孙志鹏

Chen Lei Lu Yongchao Wang Zhenfeng Sun Zhipeng

中国地质大学(武汉), 构造与油气资源教育部重点实验室, 武汉, 430074 2. 中海石油有限公司, 湛江分公司, 广东, 湛江, 524057

Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Wuhan, Hubei 430074, China 2. Zhanjiang Branch Company, CNOOC, Zhanjiang, Guangdong 524057, China

生物礁是良好的油气聚集场所,其内部结构和生长环境一直是学者关注的焦点。通过对南海西部深水区南部隆起的台地结构解剖,识别出对称和不对称2种台缘结构,提炼出了断控型、断挠型及缓坡型3种台缘样式。同时通过地震剖面分析了不同台缘结构控制下的生物礁发育形态和识别特征。最后通过研究发现研究区的台缘结构及生物礁的形成主要受控于区域构造格局差异、古地貌格局、古季风和海平面升降旋回变化。

Reefs are favorable for petroleum accumulation and their inner structure and generation environment have been the study focuses of geologists.Studies of the structure of the carbonate platform margin of the southern uplift of the western deep-water region of the South China Sea have indicated that,there are 2 types of platform margin structure (symmetrical and asymmetrical) and 3 types of platform margin style (fault-controlling,faulted flexure and carbonate ramp).Based on the analyses of seismic profiles,the generation styles and features of reef controlled by different platform margin structures have been studied.The structures of carbonate platform margin and the characteristics of reef are mainly controlled by regional tectonic differences,palaeogeomorphologies,ancient monsoons and sea level changes.

十二五国家重大专项基金(2011ZX05025)

https://doi.org/10.11781/sysydz201106607