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松辽盆地所处地壳块段的纵向结构,依密度大小可分为上、中、下地壳.在上、中地壳间有一厚的3km的低密度层段.它可能是上地幔熔融物质析离出来的“流体相”在地壳中聚集的岩浆房.它通过地壳断裂和天然地震向松辽裂谷盆地供给非生物成因天然气和其它气态物质及热液流体,这是松辽盆地形成非生物成因气藏的根本条件.在上地壳(或称盆地基底)断裂两侧有基底及以上层位的构造圈闭;有不整合面或横向延展广阔的含联通孔隙的砂层做为运移通道及天然气储集层;临近气层有泥岩做为封闭的盖层,这些条件的适当配置是非生物成因气成藏的基本特征.
The longitudinal structure of the crust blocks in the Songliao Basin can be divided into upper, middle and lower crust by density, with a thick 3 km low-density interval between the upper and middle crust, which may be due to the separation of the upper mantle melt mass Out of the “fluid phase” in the crust of the magma chamber gathered in. It through crustal faults and natural earthquakes to the Songliao rift basin to supply non-biogenic natural gas and other gaseous materials and hydrothermal fluids, which is the formation of non-biological genesis Songliao Basin The basic conditions of gas reservoirs are structural traps with basal and above strata on both sides of the fault in the upper crust (or basal basement), unconformable facies or broad lateral extensional sand beds with interconnected pores as transport channels and Natural gas reservoirs; mudstone near the gas layer as a closed cap layer, and the proper allocation of these conditions is the basic characteristic of non-biogenic gas accumulation.