伊通盆地梁家浅层油气成藏机制及其油气分布规律

Hydrocarbon Accumulation Mechanism and Distribution Law of Liangjia Shallow Reservoirs, Yitong Basin

伊通盆地岔路河断陷梁家浅层万昌组、齐家组以前一直是兼探层位,随着评价部署不断深入,相继发现了一批埋藏浅、效益好的油气藏。近两年开始全面开展梁家浅层研究和部署工作,在综合分析研究区构造、沉积、储层与油气成藏关系基础上,认为浅层油气藏主要受断层、岩性控制;明确了主要目的层段万昌组一段油气同出、单纯产油、单纯产气、全区发育,齐家组一段以油为主、主要集中在星19-3区块的油气分布规律,确立了星19-3区块齐一段油层为近期可开发动用效益区块,对区块的全面开发及产能建设部署工作具有指导意义。

The Wanchang Formation and Qijia Formation in Liangjia shallow reservoirs of Chaluhe fault have always been concurrent exploration horizon. As evaluation and deployment was intensified unceasingly, a series of hydrocarbon reservoirs with shallow depth and good benefit were discovered successively. In the past two years, overall study and deployment was carried out on Liangjia shallow reservoirs. Hydrocarbon reservoirs here were mainly controlled by faults and lithology, based on comprehensive analysis of the correlation of the structure, sediments, and reservoirs and the hydrocarbon accumulation in the studied area. It was confirmed that the first member of Wanchang Formation featured in co-production of oil and gas, simply oil production, simply gas production, and thorough development in whole area, while the first member of Qijia Formation was dominated by oil where oil and gas were mainly distributed in Block Xing 19-3. The first member of Qijia Formation was confirmed as a benefit block that could be developed and produced recently. This was of instructive significance to deployment of overall development and productivity construction in the block.