准噶尔盆地排2井区油气成藏机理

Hydrocarbon Accumulation Mechanism in Pai 2 Well Section,Junggar Basin

综合利用地质、地球物理、油气/油藏地球化学及盆地模拟领域中先进的技术与研究方法,以盆地演化和流体输导格架为成藏背景,从有效烃源岩出发,以能量场演化及其控制的化学动力学、流体动力学和运动学过程为核心,探讨了准噶尔盆地排2井区油气藏的成藏机理。精细油源对比表明,南部四棵树凹陷侏罗系含煤源岩为本区油气的主要母源。喜山期新构造运动对本区油气的生成、运移、聚集成藏等地质作用意义重大,决定了排2井区油气藏晚期浅层长距离快速充注的成藏模式。

The authors discussed petroleum generation, evolution, migration and reservoir forming conditions and its controlling factors of Pal 2 well section in Junggar Basin. Based on the basin evolution histories and conduit frame work and potential source-rock, we studied not only the evolution of the energy fields but also the kinetic and dynamic processes, by integrated geological, geophysical and geochemical means and computer modeling techniques. Detailed oil-to-source correlation showed that oil/ gas of Pai 2 well section mainly originates from ＂coal seam＂ of Jurassic in south Sikeshu sag. The geologic factors and the geologic function, such as petroleum generation, migration and accumulation and so on, were controlled by Himalayan neotectonism. The accumulation model of Pai 2 well section was attributed to late, shallow, long-distance and fast injection.