Wenchang A sag, located in the west part of Pearl Mouth basin, is a multiple hydrocarbon-generation area where two lacustrine source rocks, Wenchang and Enping Formations, have developed.

• 摘要文昌A凹陷位于珠江口盆地西部，是一个发育文昌组和恩平组两套湖相烃源岩复合成藏的油气区。