GEOLOGICAL FEATURES AND HYDROCARBON PROSPECT OF THE WESTERN DEPRESSION, TAIXI BASIN
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摘要: 从邻区盆地演化特征和区域地质条件入手,以盆地西部坳陷地质、地球物理特征和相邻地区对比分析为主要方法,对台西盆地西部坳陷构造演化和地层展布特征进行了探讨。研究表明:西部坳陷构造演化经历了5个阶段;中、新生界共发育3套烃源岩,存在4套储盖组合;构造演化主要控制着烃源岩的发育和储盖组合的形成;西部坳陷由2个东断西超的箕状断陷组成,西部缓坡带是不同类型圈闭的集中发育区,为油气运移、聚集及成藏的有利场所,勘探潜力较大。Abstract: Based on the study of regional geology and evolutionary history of the adjacent basins, we studied the tectonic evolution and stratigraphic distribution pattern of the Western Depression of the Taixi Basin in this paper, using the comparative study of geological and geophysical characteristics as a main tool. Results show that the Western Depression has experienced five phases of tectonic evolution, and there are three sets of source rocks and four sets of reservoir-seal systems in the Meso-Cenozoic. Tectonic evolution is the main factor in control over the formation of hydrocarbon source rock and reservoir-seal systems. The Western Depression is tectonically composed of two dustpan-shaped rifts. The western slope of the depression is a favorable area for hydrocarbon migration and accumulation and there are different types of traps. Therefore, the exploration potential is high there.
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