沉积盆地岩性地层圈闭成藏主控因素分析

随着世界油气勘探技术的发展和理论研究的不断深入,在新发现的油气藏中岩性地层油气藏无论是产量还是储量上都占有重要地位.因此,对这类油藏的理论研究一直是国内外石油地质学家研究的重要内容.本文认为岩性地层圈闭与构造圈闭在成藏条件和成藏机制方面存在一定差别,岩性地层圈闭的形成条件复杂,决定了其成藏主控因素具有自身的特点.提出了岩性地层圈闭成藏“四元主控”观点:即运移通道条件、流体动力条件、储层临界物性特征和砂体封闭条件.这4项主控因素控制和决定了岩性地层油气藏的形成.

Analysis of the key control factors of the formation of lithological stratigraphic traps in sedimentary basins

With the development of the techniques for oil and gas exploration in the world and the further thorough study on oil and gas exploration theory,lithological stratigraphic reservoirs occupy an important position among newly found reservoirs not only on yield but also on reserves.Therefore,the theoretical studies of this type of reservoirs have been the important content studied by the petroleum geologists at home and abroad.In this paper,it is held that there are some differences between structural traps and lithological stratigraphic traps on the aspects of formation condition and mechanism.The lithological stratigraphic traps have more complex formation conditions,which determines the key factors controlling their formation process: hydrocarbon migration pathway conditions,fluid dynamics conditions,critical physical properties of reservoirs and sealing conditions of the traps.The four factors also determine that the lithological stratigraphic traps can be formed or can not.