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延安地区为湖泊三角洲前缘沉积,沉积作用和成岩作用控制着储层孔隙。储层中原生粒间孔和次生孔隙所占比例相当,其中,绿泥石膜对研究区储层孔隙的保存起重要作用,为后期次生孔隙的生成提供了先决条件。同时,浊沸石大量溶解是研究区储层的一大特点,而绿泥石膜和浊沸石溶孔的匹配关系有利于优质储层的形成,可构成研究区最好的储层类型,对进一步寻找浊沸石分布带有重要指导意义。
The Yan’an area is the sedimentation and sedimentation of the delta front of the lake and controls the porosity of reservoirs. The proportion of primary intergranular pores and secondary pores in reservoirs is quite high. Chlorite film plays an important role in the preservation of reservoir pores in the study area, which provides preconditions for the formation of secondary pores in the later stage. At the same time, the massive dissolution of laumontite is a major feature of reservoirs in the study area. The matching relationship between chlorite film and lazulite dissolution pores is favorable to the formation of high-quality reservoirs and constitutes the best reservoir type in the study area, Looking for the distribution of talc zeolite has important guiding significance.