Y214超低渗多层系油藏沉积特征研究  

Study on Sedimentary Characteristics of Y214 Ultra-low Permeability Multi Layer Reservoir

作　　者：杨华 韩明 沈骏峰 曹耀平 Yang Hua;Han Ming;Shen Junfeng;Cao Yaoping(No.8 Recovery Plant,Changqing Oilfi eld Company,Petro China,Shaanxi,710000)

机构地区：[1]中石油长庆油田分公司第八采油厂,陕西710000

出　　处：《当代化工研究》2025年第1期40-42,共3页Modern Chemical Research

摘　　要：鄂尔多斯盆地超低渗多层系油藏具有低渗透、层系结构复杂多变、非均质性强等特点,具有很大的特殊性。为提高Y214区块油藏开发效益,通过岩心和测井录井资料对该地区地质特征进行研究,重新认识长4+5和长6储层的沉积相和砂体展布特征。研究结果显示,研究区存在三角洲前缘亚相,主要包括水下分流河道、分流间湾和河口坝三种沉积微相。研究区砂体的平面分布受控于沉积微相,顺物源方向的砂体连通性好,在差异压实作用下发育近东西向的鼻状隆起。Y214区块的沉积特征研究对该油藏的勘探开发具有指导意义。The ultra-low permeability multi-layered reservoir in the Ordos Basin has the characteristics of low permeability,complex and changeable layer structure,and strong heterogeneity,which has a great deal of peculiarity.In order to improve the benefits of reservoir development in Block Y214,this paper studies the geological characteristics of this area through core and logging data,and re-understands the sedimentary facies and sand body distribution characteristics of Chang 4+5 and Chang 6 reservoirs.The results show that there are delta front surfaces in the study area,which mainly include three sedimentary microfacies:underwater distributary channel,distributary bay,and estuary bar.The planar distribution of sand bodies in the study area is controlled by sedimentary microfacies.The sand bodies in the direction of provenance have good connectivity,and under differential compaction,nose bulges develop in the east-west direction.The study of the sedimentary characteristics of the Y214 block in this paper is of great significance for the exploration and development of this reservoir.

关 键 词：鄂尔多斯盆地 致密砂岩储层 沉积相 砂体展布 

分 类 号：P618.13[天文地球—矿床学]