苏里格气田苏6井区上古生界沉积相特征研究

目的探讨鄂尔多斯盆地苏里格气田苏6井区上古生界沉积相的特征。方法以井下剖面沉积分析资料为主,通过钻井岩心和测井资料相结合的沉积相分析为研究基础,对区内上古生界沉积体系、沉积相特征进行描述,研究各沉积体系的时空展布和演化规律,分析沉积相对砂体的影响因素。结果得出了苏里格气田苏6井区上古生界沉积相的特征,结合沉积盆地的构造演化历史,指出苏里格气田苏6井区上古生界的沉积组合特征。结论提出该区岩相古地理格局控制了砂体区域展布规律及演化进程的认识,为开发井的井位部署提供了可靠的沉积学依据。

Research on the sedimentary facies characteristics of Upper Paleozoic reservoir in Su 6 Region, Sulige Gasfield

Aim To discuss the sedimentary facies characteristics of Upper Paleozoic reservoir in Su 6 region,Sulige gas-field,Ordos Basin.Methods Using the analysis of rock core,log well date and section,the sedimentary systems and facies characteristics of Upper Paleozoic are described,the time-space distribution and evolution rule of the depositional systems are studied.Finally,the influence of the sedimentary facies on sand-body is analysed.Results The characteristics of sedimentary combination in Su 6 region were demonstrated by the study of the sedimentary facies characteristics,as well as the structueral evolution history of the sedimentary basin.Conclusion It is considered that the petrofacies paleogeography controls the distribution and evolution law of the sand body.Thus the more reliable sedimentary basis are provided for the arrangement of developing well.