永安镇油田永3断块油气成藏条件及主控因素

Hydrocarbon accumulation condition and main controlling factors of Yong 3 Fault Block in Yonganzhen Oilfield

永3断块位于东营凹陷东北部永安镇油田南部,是一个多油源汇集的地区,近年来仍不断有新的发现,充分显示了在这类复杂断块区进行深度开发的巨大潜力,本次研究在目的层段沙二下油气藏条件的基础上,分析了油气来源、储层特征、运移通道以及圈闭类型,圈定了油气成藏的主控因素,查明了油气藏分布与富集的规律,认为永3断块具有优越的成藏地质条件,构造、沉积相带是研究区油藏形成的主要控制因素,油藏分布受有利的构造条件和沉积体系的相互配合,平面上含油区域主要分布在中-低台阶,该研究成果对于永3断块今后的挖潜增效具有重要的意义。

Yong 3 Fault Block lies in the south of Yonganzhen Oilfield in Dongying Depression and has very complex oil source relation. In recent years, new oil and gas have been discovered, which confirmed the great potential in the exploration and development of such complex fault block reservoir. Based on the study of hydrocarbon accumulation condition of Es2 member sand body, this paper analyzed the oil and gas sources, reservoir properties, migration path and trap type, decided the main controlling factors of hydrocarbon accumulation and identified the hydrocarbon distribution and enrichment rule. It is considered that Yong 3 Fault Block has a good hydrocarbon accumulation conditions and the main controlling factors for reservoir forming are structure and sedimentary facies, so the reservoir distributions are affected by them. In plane, the oil-bearing zones are in middle and low steps. This study has great significance for the oil potential tapping of Yong 3 Fault Block.