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近年来世界各地的勘探实践表明,古老地台活动边缘的推覆体前缘逆冲带不但是最大的沉积区,而且是最大的油气聚集区。在古老地台边缘带最令人感兴趣的是被改造的碰撞型被动边缘,全球最重要的含油气盆地均分布在这里,42%的油气田发现于碰撞地台-褶皱盆地区。岩石圈板块边缘带在地球动力学营力的作用下,不但为沉积岩中所含的有机质向烃类的演化提供了热能,而且在水平挤压力的作用下,使岩石产生密集的裂缝形成次生储集层。控制着板块活动的大断裂是油气运移的通道,在断裂交汇处,巨大的压力降使流体的流动性提高,岩石圈板块的碰撞带,一方面促进了有机质的演化,另一方面使已形成的油气藏重新分配,从而最终导致次生大油气田的形成。
Exploration practice around the world in recent years shows that the thrust belt of the tectonic front formed on the edge of the ancient platform is not only the largest deposition area but also the largest accumulation area of oil and gas. The most interesting area on the margins of the ancient platform is the modified collision-type passive edge, where the most important petroliferous basins in the world are located and 42% of the fields are found in the collision platform - the fold basin. Under the action of geodynamics, the marginal zone of the lithospheric plate not only provided heat energy for the evolution of organic matter in the sedimentary rocks, but also produced intensive cracks in the rock under the horizontal squeezing pressure Health reservoir. The large faults that control the activity of the plate are the channels of hydrocarbon migration. At the intersection of faults, the huge pressure drop enhances the fluidity of fluid and the collision zone of lithospheric plates, on the one hand, promotes the evolution of organic matter, on the other hand, The resulting reservoirs are redistributed, eventually leading to the formation of secondary large oil and gas fields.