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长期以来一直将泥岩压实作用作为石油初次运移的主要动力,认为母岩中生成的烃类,是以溶解状态随水一起离开母岩进入储层的.近年来由于有机地球化学及其分析技术的飞跃发展,以干酪根热降解为核心的晚期生油理论得到了普遍赞同.而与此同时,在石油生成与初次运移理论间却出现了严重的矛盾.因为,按照以往对压实作用的理解,泥岩在埋藏及压实过程中的排水量只在浅处较大,髓着深度加大则迅速降低;又因烃类在水中的溶解度一般仅万分之几,显然晚期成岩阶段的排水量是难以满足石油初次运移需要的.
For a long time, mudstone compaction has been regarded as the main driving force for the initial migration of petroleum, and the hydrocarbons generated in the parent rock are dissolved into the reservoir along with the water to leave the parent rock.In recent years, due to the organic geochemistry and its analysis The rapid development of technology has led to the general agreement of the theory of advanced oil production that the kerogen thermal degradation is the core. At the same time, there is a serious contradiction between the theory of oil production and initial migration because, The understanding of the role of mudstone in the process of burial and compaction of the drainage in only a shallow depth, the deepening of the pith with the rapid decrease; because of the solubility of hydrocarbons in water is generally only a few percent, it is clear that the late stage of the diagenetic displacement It is difficult to meet the initial migration needs of oil.