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通过地质、地球化学、地球物理等学科的综合研究,认为原始沉积作用、岩溶作用、白云岩化作用和构造破裂作用是形成济阳坳陷桩海地区下古生界古潜山碳酸盐岩储层的主要作用。其中原始沉积作用控制了石灰岩储集物性的特征;岩溶作用使储层物性进一步改善,形成优质的碳酸盐岩岩溶储层;白云岩化作用形成了优质的白云岩岩性储层;岩石的原生孔隙度是成岩白云岩储层形成的必要条件;白云石化过程中粒屑的收缩作用是白云岩储层孔隙的形成机制;破裂作用形成的裂缝是发生强烈岩溶作用的基础,并形成了裂缝性或缝洞性储层。进而认识到,平面上桩海地区下古生界碳酸盐岩储层缝洞分布呈条带状。
Through the comprehensive study of geology, geochemistry and geophysics, it is considered that the primary sedimentation, karstification, dolomitization and tectonic rupture are the formation of the Lower Paleozoic buried hill carbonate rocks in the Zhuhai area in the Jiyang depression The main role of the reservoir. Among them, the original sedimentation controlled the characteristics of limestone reservoir properties. Karstification further improved the physical properties of the reservoirs to form high-quality carbonate karst reservoirs. Dolomite lithology led to the formation of high-quality dolomite lithologic reservoirs. The primary porosity is a necessary condition for the formation of diagenetic dolomite reservoirs. The shrinkage effect of the dolomite during the dolomitization process is the formation mechanism of the dolomite reservoir pores. The fractures formed by the fracturing are the basis for the intense karstification and form the fractures Sexual or fissured reservoir. Then it is recognized that the fracture distribution of the lower Paleozoic carbonate reservoirs in the strata is in a strip shape.