南海东北部潮汕坳陷中生代构造特征及其油气勘探潜力

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。

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

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.