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方法 在对大庆长垣以东地区深层天然气藏的生、储、盖、圈等特征进行分析、研究的基础上 ,提出了该区深层天然气的成藏条件与模式。目的 为该区深层天然气下一步勘探开发指明方向。结果 该区深层天然气主要来自侏罗系气源岩 ,少量来自白垩系登娄库组气源岩 ;具有基岩风化壳成藏模式 ,地层超覆成藏模式 ,登二段和泉一、二段两套区域性盖层之下各种圈闭的成藏模式和泉一、二段盖层内各种圈闭的成藏模式。结论 该区深层天然气藏主要受气源岩、运移通道和盖层三个基本条件控制 ;侏罗系各断陷的周缘是该区深层天然气聚集成藏的有利部位 ,也是勘探的有利地区
Methods Based on the analysis and research of the characteristics of the deep natural gas reservoirs east of Daqing Changyuan, the conditions and models of deep natural gas accumulation in the area were proposed. The purpose is to specify the direction for further exploration and development of deep natural gas in the area. Results The deep natural gas in this area mainly came from the Jurassic gas source rocks and a small amount came from the Cretaceous Denglouku gas source rock. It has the basic bed weathering crust accumulation model and overlying strata accumulation and accumulation model, Two sets of regional caprock below the accumulation of various trapped reservoirs and springs one or two cap layers of various trapped accumulation mode. Conclusions The deep natural gas reservoirs in this area are mainly controlled by three basic conditions: source rocks, migration channels and cap rocks. The periphery of each Jurassic fault is a favorable site for the accumulation and accumulation of deep natural gas in this area and also a favorable area for exploration