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渤海湾盆地许多地区的泥质岩地层中都发现了工业油流,做为一种非常规的油气藏,其分布特征主要表现为:①分布在成熟的烃源岩中,为自生自储型;②泥质岩油气藏主要位于超压泥质岩微裂缝带内,该带在垂向上集中分布在一定区间,平面上可以区域对比;③泥质岩油气藏主要受构造活动控制,集中分布在断层带附近。根据有关油气初次运移的模拟试验及相关理论,认为泥质岩油气藏的形成与混相涌流有关,断裂活动是导致油气在生油岩内顺层定向富集的主要诱因。在这种认识的基础上,初步探讨了泥质岩油气藏勘探的关键技术。
As an unconventional oil and gas reservoir, the industrial oil flow is found in the mudstone strata in many areas of the Bohai Bay Basin. Its distribution features mainly include: ① distributed in mature source rocks, ; ②The argillaceous oil and gas reservoirs are mainly located in the micro-fracture zone of overpressured argillaceous rocks, which are concentrated vertically in a certain interval and can be compared in the plane; ③The argillaceous oil and gas reservoirs are mainly controlled by tectonic activities and concentratedly distributed Near the fault zone. According to the simulation test and related theories on primary migration of oil and gas, it is considered that the formation of argillaceous oil and gas reservoirs is related to the mixed inrush current, and the fault activity is the main inducement for the directional enrichment of hydrocarbon in the oil-bearing rocks. Based on this understanding, the key technologies of exploration for argillaceous oil and gas reservoirs are preliminarily discussed.