志丹油田纸纺地区长2油层组地层精细划分与对比

Fine stratigraphic classification and correlation of Chang 2 reservoir of

利用测井曲线和岩心资料,分析了研究区150余口探井的岩、电特征,对志丹油田纸坊地区长2油层组进行了精细划分与对比,将长2油层组自上而下划分为长211、长212、长221、长222、长23等5个不同级别的小层,各小层厚度大致相等。其中长211、长221小层为水下分流河道、分流间湾和河口沙坝沉积,砂体发育良好,是研究区长2油层组的主力产油层。长2油层组的精细地层划分与对比为研究沉积微相、砂体展布、储层非均质性及预测有利含油区块提供了地质基础数据,为研究区的储层研究及注水开发方案的确定奠定了良好的基础,对油田开发具有非常重要的意义。

Based on well logs and core data, the characterlstics ot the rocK--electric property of more than 150 wells are analyzed. The fine stratigraphic classification and correlation of Chang 2 reservoir in Zhifang area of the Zhidan Oilfield are carried out. From top to bottom, Chang 2 can be divided into Chang 21^1, Chang 21^2,Chang22^1,Chang22^2,Chang23. Among them, Chang 21^1 and Chang 22^1 are underwater distributary channel deposits, etc. , they become the dominated reservoirs in the study area. The fine classification and correlation can provide geologic basic data for the study on sedimentary microfacies, sand body distribution, reservoir heterogeneity and favorable target prediction, for the study area of the reservoir study and determination of optimization of water iniection scheme development program has laid a good foundation,which takes a significant part in the oilfield development.