大民屯凹陷基岩油气藏油气运聚规律研究

Research on regular pattern of petroleum migration and accumulation of basement hydrocarbon reservoir in damin-tun depression

大民屯凹陷已进入油气勘探中后期,基岩油气藏为下一步勘探的主战场。通过流体非均质性反演了基岩油气藏油气充注方向,认为大民屯凹陷高蜡油主要来源于安福屯洼陷和胜东洼陷,其中安福屯洼陷为主要油源区。根据凹陷潜山的构造特征、油气藏分布特征及充注方向的分析将凹陷分为六个油气运聚单元,并进行了综合评价,认为除荣胜堡洼陷和三台子洼陷油气运聚单元基岩油气藏成藏条件较差外,其它运聚单元基岩油气藏勘探前景都较大。

As exploration activity in Damintun has entered into middle- late stage, basement hydrocarbon reservoir will be the main target for further exploration. By means of fluid heterogeneity inversion on hydrocarbon filling direction, high - waxy oil in Damintun depression is mainly considered to come from Anfutun sag and Shengdong sag, and Anfutu sag is the primary hydrocarbon kitchen. Dam-ingtun depression can be divided into six petroleum migration and accumulation units according to the tectonic feature, reservoir distribution and hydrocarbon filling direction. The comprehensive evaluation shows that other five units have great exploration potential except Shongsheng-pu sag unit and Santaizi sag unit.