下寺湾油田延长组长9致密砂岩储层特征及主控因素分析

发布时间：2019-03-26 11:50

【摘要】：下寺湾油田延长组长9段致密砂岩储层特征研究程度低,致密油勘探未取得突破性进展。为了探明研究区延长组长9段致密油的勘探前景,从岩心样品分析入手,通过观察铸体薄片、扫描电镜,并进行压汞曲线分析、以及岩心样品物性分析测定等对下寺湾油田长9致密砂岩储层微观结构特征及主控因素进行了研究。结果表明长9段储层岩性以灰色岩屑长石砂岩为主,结构及成分成熟度均较低;填隙物以胶结物为主,胶结物以绿泥石、伊利石、铁方解石为主;孔隙类型以溶蚀粒间孔为主;孔喉大小分布不均,分选性较差,总体吼道半径较小;浊积主水道及绿泥石环边胶结相对优质储层发育起着主要控制作用。
[Abstract]:The study degree of tight sandstone reservoir in Chang 9 member of Yanchang formation in Xiasiwan Oilfield is low, and no breakthrough progress has been made in tight oil exploration. In order to find out the exploration prospect of tight oil in Chang-9 section of the study area, starting from the analysis of core samples, by observing the thin pieces of casting, scanning electron microscopy, and analyzing the mercury pressure curve, The microstructure and main control factors of Chang-9 tight sandstone reservoir in Xiasiwan oilfield are studied. The results show that the lithology of Chang-9 reservoir is mainly composed of gray lithic feldspathic sandstone, and the maturity of structure and composition is low, the filling material is mainly cementite, the cementitious matter is chlorite, Illite and ferrocalcite, the pore type is mainly dissolved intergranular pore, and the pore type is mainly dissolved intergranular pore. The pore throat size is unevenly distributed, the sorting ability is poor, and the overall roar radius is smaller, and the turbidite main channel and chlorite ring edge cementation play a major role in controlling the development of high-quality reservoirs.
【作者单位】：西安石油大学地球科学与工程学院;延长石油下寺湾采油厂勘探开发研究所;
【基金】：陕西省教育厅专项科研计划项目(编号:14JK1579和编号:14JK1586) 中国地质调查局资源调查与评价项目(编号:12120113040300-03)联合资助
【分类号】：P618.13

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