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按照岩溶化特点,黄骅盆地奥陶系碳酸盐岩古岩溶可分为三种不同的类型:由大气水溶解形成的岩溶、有机酸溶蚀古岩溶及埋藏热液古岩溶。其中,控制古生界碳酸盐岩储层物性的大气水岩溶对潜山油气聚集起着显著的作用,它的形成与黄骅盆地演化过程中三期(加里东、印支—燕山及喜马拉雅期)重要的碳酸盐岩暴露事件有关。这三期与古抬升相关的岩溶作用相互叠置在一起形成古岩溶复合系统,在黄骅盆地中,由加里东、印支—燕山期岩溶叠置的古岩溶复合体拥有较多的有效孔隙及缝洞,有利于油气的储集,是黄骅盆地中最好的碳酸盐岩储层。同时,古岩溶复合体的形成时间对潜山油气运聚起着决定性作用,发育于中新生代的大气水岩溶是“新生古储”油气聚集的有利因素,但对古生界原生油气聚集不利。加里东期岩溶、埋藏热液古岩溶及有机酸溶蚀古岩溶则对古生界原生油气聚集有利。
According to the characteristics of karstification, the ancient karstification of Ordovician carbonate rocks in Huanghua Basin can be divided into three types: karstification formed by dissolution of atmospheric water, dissolution of ancient karst by organic acids and buried karstification of hydrothermal fluids. Among them, the atmospheric water karstification that controls the physical properties of the Paleozoic carbonate reservoir plays a significant role in the accumulation of buried hill oil and gas, and its formation is consistent with the evolution of the Huanghua basin in the third phase (Caledonian, Indo-Yanshan and Himalayan ) Important carbonate rock exposure events. The three karstification associated with the paleo-uplifts are superimposed on each other to form an ancient karst complex system. In the Huanghua basin, the ancient karst complexes superimposed by the Caledonian-Indosinian-Yanshanian karstification have more effective pores and seams The hole is conducive to the accumulation of oil and gas and is the best carbonate reservoir in the Huanghua basin. At the same time, the formation time of ancient karst complexes plays a decisive role in hydrocarbon migration and accumulation in buried hills. The atmospheric water karst developed in the Meso-Cenozoic is a favorable factor for the accumulation of hydrocarbon in the “newborn ancient reservoirs,” but unfavorable for the accumulation of primary hydrocarbon in the Paleozoic . Caledonian karstification, burial hydrothermal karst and organic acid karstification paleo-karstification are favorable for the accumulation of primary hydrocarbon in the Paleozoic.