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通过台北凹陷侏罗系储层岩石学特征、孔隙发育特征的分析 ,得出其原生孔隙不发育 ,次生孔隙是主要孔隙类型和油气聚集的主要空间 ,进而分析了次生孔隙的微观、宏观识别标志以及空间分布特征。通过孔隙水中有机酸和碳酸含量与来源的分析 ,探讨了次生孔隙的形成机理 ,认为有机酸对骨架颗粒长石和岩屑的溶解是形成次生孔隙的根本原因。该研究对于台北凹陷乃至整个盆地侏罗系的油气勘探和开发具有重要的现实意义。
Based on the analysis of petrological characteristics and pore development characteristics of Jurassic reservoirs in Taipei depression, it is concluded that the primary pores are not developed and the secondary pores are the main pore types and the main space for hydrocarbon accumulation. Then the microscopic and macroscopic characteristics of secondary pores Identification signs and spatial distribution characteristics. Based on the analysis of organic acid and carbonate content and source in pore water, the formation mechanism of secondary pores was discussed. It was considered that the dissolution of feldspartoid and cuttings by organic acids was the fundamental reason for forming secondary pores. This study has important practical significance for the exploration and development of oil and gas in the Jurassic of the whole depression and the whole basin in Taipei.