柴北缘西部油气成藏的主控因素

通过对柴北缘西部成藏地质条件及成藏过程的研究,得出控制其成藏的主要因素是烃源岩的存在和分布、输导系统的连通程度、圈闭形成时间与主要排烃期的配置。从更深层次上看,断裂是控制成藏的最根本因素,它通过控制烃源岩的分布、圈闭的形成、纵横向的沟通作用及对原生油气藏进行破坏形成次生油气藏,最终决定油气藏的分布。

Main factors controlling hydrocarbon accumulation in western part of northern edge of Qaidam basin

Studies on the geological conditions and process of hydrocarbon accumulation in western part of northern edge of Qaidam basin show that the main factors controlling hydrocarbon accumulation are the occurrence and distribution of source rock, the connectivity of carrier rock and the timing of trap formation and main expulsion stages. In a more profound respect, however, faults are the fundamental factor that ultimately determine the distribution of oil and gas reservoirs through controlling the distribution of source rock, trap formation, vertical and lateral connectivity,and formation of secondary oil and gas reservoirs from destruction of primary reservoirs.