【摘要】 潮汕坳陷是以中生界为目标的新的油气勘探领域,其地层时代、产状、岩性以及构造特征等都与珠江口盆地其他坳陷差别很大。鉴于该坳陷内尚无探井,该文充分利用地震资料,结合区域研究成果合理选择参数,利用Basin2盆地模拟软件,对该坳陷沉积充填史、温压场演化史和有机质演化史进行了正演模拟,模拟结果显示坳陷内中生界白垩系经历的二次成烃作用提供了主要烃源,而且由于新生代的构造运动,形成了良好的构造圈闭,因此该含油气系统生储盖的时空配置有利于在晚白垩世地层中形成自生自储或下生上储的岩性圈闭和构造圈闭油气藏,应作为该坳陷油气勘探的主要目的层。更多还原

【Abstract】 The Mesozoic of Chaoshan depression is a new area for hydrocarbon exploration, and the times, attitude, lithology of its strata and tectonic characteristics are different from those of other depressions in the Pearl River Mouth basin. In view of no wells in this depression, the authors, according to predecessor’s studies, simulated the history of sediments filling depression, evolution of temperature and pressure, and the evolution of organic matters by making full use of seismic data and choosing the involved parameters. To the whole course of simulation, the software Basin2 has been applied. The results show that the hydrocarbon re-generation of K₁ strata offers most hydrocarbon sources, and because some good tectonic traps were formed by Cenozoic tectogenesis, the petroleum system K₁-K₁ would make hydrocarbon accumulate in lithologic and/or tectonic reservoirs. Hence, this petroleum system should be recognized as the most important target for hydrocarbon exploration.更多还原