垦西地区油气成藏模式

垦西地区发育多种类型的圈闭，油气资源丰富，是一个复式油气聚集地区，综合研究认为，该区油气油个成藏期，垦东营沉积中后期的沙四段烃源岩成熟藏期和明化镇组沉积中期的沙三段烃源岩成熟成熟期，油气藏油断裂带和渤南洼陷南缘斜坡呈现状分布，沿同向和反向断层纵向分布悬殊，不同圈闭类型的油气藏发育部位不同，稠油与稀油的时空分布差异较大，沙四段，沙三段源岩均具有侧向和垂向运聚成藏模式。

Oil - gas reservoir forming pattern in Kenxi area

Kenxi area is a multiple oil?gas accumulation one with many types of developed traps and abundant hydrocarbon resources. Synthetical study presents that there are two resevoir forming stages in this area, one is mature hydrocarbon source rocks of Es 4 in middle?late Ed sedimentary period, the other is mature hydrocarbon source rocks of Es 3 in middle Em sedimentary period. Oil?gas accumulation distributes in ring along fracture belt and south edge of slope in Bonan subsag, and great disparity of distribution appeared in vertical direction along synthetic and antithetic fault. Positions of development are different for different trap types of oil?gas reservoir. Large differences exist between time?and?space distribution of heavy crude and light crude. Es 3 and Es 4 source rocks are both in reservoir forming pattern of lateral and vertical migration.