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在上覆地层负荷的压实作用下,泥质沉积物在其成岩过程中,其孔隙度和矿相的演变不仅影响着烃类的生成,而且决定着生成的烃类自母岩的初次运移。加强对沉积物压实作用和石油初次运移机理的研究,可以提高对油气远景评价的可靠性。 本文以苏北高邮凹陷苏高128井、苏高122井和苏都136井等三口钻井剖面,研究压实作用下泥岩孔隙度的变化及其石油初次运移的条件。
Under the compaction of the overburden load, the porosity and mineralogical evolution of the muddy sediments not only affect the formation of hydrocarbons, but also determine the initial transport of the generated hydrocarbons from the parent rock shift. Strengthening the compaction of sediments and the mechanism of primary migration of oil can improve the reliability of the long-term evaluation of oil and gas. In this paper, three well drilling sections of Su-128, Sukao-122 and Sudu-136 in the Gaoyou Sag of northern Jiangsu Province are used to study the change of the porosity of the mudstone under compaction and the conditions for its primary migration.