摘要
定边油田张崾岘区块亮马台开发单元长2储层非均质性特征不清晰,通过测井资料、岩心分析以及压汞实验等方法对储层非均质性特征开展研究。结果表明:长2储层以灰绿色细粒长石砂岩和长石岩屑砂岩为主,颗粒分选及磨圆度较好,粒度较细,粒间孔与溶蚀孔发育,孔隙间喉道细小;通过砂地比、隔层发育状况以及变异系数等非均质性参数计算,广泛发育的隔层加剧了层间非均质性,并对油气运移和聚集产生了重要影响;长2储层发育的泥质夹层导致储层非均质性增强,渗透率以正韵律、复合韵律型为主;河道砂体影响储层的平面展布,长2储层的孔隙度、渗透率分布与砂体展布及发育状况密切相关。
In order to study the heterogeneity characteristics of Chang 2 reservoir in Liangmatai development unit of Dingbian Oilfield,the macroscopic and microscopic heterogeneity characteristics of the study area were studied through methods such as logging data,core analysis,and mercury intrusion experiments.Furthermore,the heterogeneity characteristics of the Chang 2 reservoir were analyzed.The results show that the Chang 2 reservoir is mainly composed of gray green fine-grained feldspar sandstone and feldspar lithic sandstone,with good particle sorting and roundness,fine particle size,developed inter-granular pores and residual dissolution pores,and small pore throats.By calculating heterogeneity parameters such as sand to ground ratio,interlayer development status,and coefficient of variation,the widely developed interlayer intensifies interlayer heterogeneity and has an important influence on oil and gas migration and accumulation.The shale interlayer of Chang 2 reservoir increases the reservoir heterogeneity,and the permeability is dominated by positive rhythm and compound rhythm.The channel sand body affects the horizontal distribution of the reservoir,and the porosity and permeability distribution of Chang 2 reservoir are closely related to the distribution and development of the sand body.
作者
魏鸣禄
雷倩倩
杨志鹏
宁波
WEI Minglu;LEI Qianqian;YANG Zhipeng;NING Bo(Exploration&Development Technology Research Center of Yanchang Oilfield Co.,Ltd.,Yan’an 716000,Shaanxi,China)
出处
《石油地质与工程》
CAS
2024年第5期42-46,共5页
Petroleum Geology and Engineering
关键词
定边油田
长2储层
储层非均质性
隔夹层
河道砂体
Dingbian Oilfield
Chang 2 reservoir
reservoir heterogeneity
interlayer
channel sandbody
