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中国海相油气田都经历了多期成藏和后期改造,它们既不是典型的原生,也与海生陆储的次生油气藏有明显的区别,它应属准原生油气藏。对以碳酸盐岩中不规则的岩溶洞缝体来说,不宜再用储集层和盖层的称谓,而应采用储集体和封堵体的概念。不规则储集体分纳溪型、塔河型、任丘型三大类,其岩溶缝洞的发育程度和孤立储集体间的连通程度依次加强,其中的流动性质、油气水界面和压力的统一性也随之增强。塔河油藏既不是层状、块状,也不是地层不整合、风化壳型油藏,而是网络状油藏,其内部的油气水性质、界面位置、压力均有较大差别。阿克库勒凸起和塔河油区都是多类型储集体的组合。该隆起具有整体含油性和巨大的含油不均一性。测试和试采是评价该类储集层的主要手段,酸压改造是勘探开发中“常规性”的程序。
China’s marine oil and gas fields have undergone multi-period hydrocarbon accumulation and subsequent reconstruction. They are neither typical primary nor secondary hydrocarbon reservoirs of marine terrestrial reservoirs. They should belong to quasi-primary hydrocarbon reservoirs. The use of reservoirs and plug-in concepts should not be reused for reservoirs and caprocks in the case of irregular karst seams in carbonate rocks. The irregular reservoirs include three types of streams, Tahe and Renqiu. The development degree of karst fractured caves and the connectivity between isolated reservoirs are enhanced in turn. Among them, the flow properties, the unity of oil-gas water interface and pressure Sex also increases. The Tahe reservoir is neither stratified nor massive, nor is it an unconformity or weathered crustal reservoir. Instead, the networked reservoir is characterized by large differences in oil-gas-water properties, interface location and pressure. Both the Akekule Bulge and the Tahe Oil Region are combinations of multiple types of reservoirs. This bulge has the overall oiliness and the great oil heterogeneity. Testing and trial mining are the main means of evaluating such reservoirs. Acid fracturing is a “normal” procedure in exploration and development.