岩性油气藏 ›› 2022, Vol. 34 ›› Issue (2): 3144.doi: 10.12108/yxyqc.20220203
魏钦廉1,2, 王翀峘1,2, 刘军峰3, 胡榕1,2, 刘美荣3, 吕玉娟3
WEI Qinlian1,2, WANG Chonghuan1,2, LIU Junfeng3, HU Rong1,2, LIU Meirong3, LYU Yujuan3
摘要: 鄂尔多斯盆地樊家川长6储层为新的开发区域,其中长63为主力油层。为研究其致密储层特征及主控因素,开展了岩石薄片鉴定、常规物性及高压压汞分析等,对储层的岩石学、物性及孔隙结构特征进行了详细研究,建立了不同孔隙结构与成岩参数的识别函数,分析了不同孔隙结构储层储集性能主控因素。结果表明:①樊家川地区长63主要岩石类型为岩屑长石砂岩,岩性较细,黏土矿物主要发育水云母,其次是绿泥石,碳酸盐胶结物主要发育铁白云石,其次是铁方解石;②樊家川地区长63储层孔隙主要发育粒间孔和长石溶孔,物性较差,平均孔隙度为9.05%,平均渗透率为0.17 mD,以低孔-特低孔、超低渗储层为主;依据孔隙结构分类标准将樊家川长63储层孔隙结构分成3类,并区分各自的喉道类型与分布区域;③沉积微相是控制樊家川长63储层物性和含油性的关键因素,压实作用是造成储层致密化的主要成岩作用,胶结作用和溶蚀作用是造成孔隙结构差异的重要因素,且不同孔隙结构储层其沉积和成岩作用的影响存在较大差异。该研究结果对长庆油田致密油的综合评价具有指导价值。
中图分类号:
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