南海东北部潮汕坳陷中生代构造特征及其油气勘探潜力-Mesozoic tectonic characteristics and exploration prospects of the Chaoshan depression in the northeastern South China Sea

南海东北部潮汕坳陷中生代构造特征及其油气勘探潜力

2022,96(8):2896-2905

钟广见^1,2, 苏丕波¹, 冯常茂¹, 刘胜³, 孙鸣^1,2, 易海¹, 赵静¹, 赵忠泉¹

1) 广州海洋地质调查局，广东广州,510760;2) 南方海洋科学与工程广东省实验室(广州)，广东广州,511458;3) 中石化地球物理公司，四川成都,641400

摘要：钻探资料证实南海东北部发育海相中生界。潮汕坳陷是南海东北部最大残留坳陷，面积达3. 7×10 4 km2，经历了晚三叠世张裂初期、侏罗纪坳陷期、晚侏罗世末期第一次构造反转期、早白垩世再沉降期、晚白垩世晚期第二次构造反转期及新近纪区域热沉降期等6个构造演化阶段，充填了滨浅海、半深海等海相沉积及河湖相等陆相沉积。潮汕坳陷侏罗系半封闭海湾型烃源岩有机质丰度相对较高，泥岩地层厚，生烃能力强，油气地质条件好，具有较好的油气勘探前景。

关键词：南海；潮汕坳陷；中生界；构造演化；油气勘探潜力

Mesozoic tectonic characteristics and exploration prospects of the Chaoshan depression in the northeastern South China Sea

Zhong Guangjian^1,2, Su Pibo¹, Feng Changmao¹, Liu Sheng³, Sun Ming^1,2, Yi Hai¹, Zhao Jing¹, Zhao Zhongquan¹

1) Guangzhou Marine Geological Survey, Guangzhou, Guangdong 510760, China;2. 2) Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, Guangdong 511458, China;3) Sinopec Group Petroleum Engineering Geophysics Co., Ltd, Chengdu, Sichuan 641400, China

Abstract：Drilling data has confirmed the presence of Mesozoic marine deposits in the northeastern part of the South China Sea. The Chaoshan depression is the largest residual depression in the northeastern part of South China Sea with an area of 3.7×104 km2. From Mesozoic to Cenozoic era, the Chaoshan depression experienced 6 stages of tectonic evolution: rifting during Late Triassic, depression during Jurassic, first tectonic inversion at the end of Late Jurassic, followed by subsidence during Early Cretaceous, second tectonic inversion at the end of Late Cretaceous, and regional thermal subsidence during Neocene. The depression was filled by shallow sea sediments, bathyal sediments, fluvial sediments and lacustrine sediments. The hydrocarbon source rocks of the Jurassic semi- enclosed gulf are thick with relatively high organic content, and strong hydrocarbon generation potential. Chaoshan depression has good oil and gas exploration prospects because of good oil and gas geological conditions.

Key words：South China Sea; Chaoshan depression; Mesozoic; tectonic evolution; exploration prospect

收稿日期：2022-04-25

基金项目：本文为南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项(编号GML2019ZD0201)、国家自然科学基金项目(编号41941016，42072240，41830217)、中国地质调查局调查项目(编号DD20221860)、第二次青藏高原综合科学考察研究项目(编号2019QZKK0901)和中国地震局地球物理研究所基本科研业务费项目(编号DQJB20B21)联合资助的成果。

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