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通过对岩心观察、铸体薄片、扫描电镜、实验数据统计分析等方法,对毛家河油区长6油层组储层特征分析取得以下认识:(1)储层岩石为长石细砂岩;(2)孔隙以粒间孔和溶孔为主,孔隙结构类型主要是中孔细喉型;(3)非均质性为中等非均质性;(4)敏感性为弱速敏、弱盐敏、中等水敏、中等酸敏、中等偏弱碱敏、中等偏弱应力敏;(5)储层类型为特低渗-超低渗储层。
Through the analysis of core observation, casting thin slice, scanning electron microscope, statistical analysis of experimental data and other methods, the reservoir characteristics of Chang 6 oil layer in Maojiahe Oilfield are as follows: (1) The reservoir rock is feldspar fine sandstone; ( 2) The pores mainly consist of intergranular pores and dissolved pores, and the types of pore structures are mainly mesopore thin-throat type. (3) The heterogeneity is medium heterogeneity. (4) The sensitivity is weak speed sensitive, weak salt sensitive, Moderately water-sensitive, moderately acid-sensitive, moderately weakly alkaline, moderately weakly sensitive; (5) The reservoir type is ultra-low permeability and ultra-low permeability reservoirs.