微电阻率成像测井资料在塔河油田缝洞型储层综合评价中的应用

The application of microresistivity imaging log in the evaluation of carbonate fracture-vug reservoir in Tahe oilfield

中国科学院地质与地球物理所,北京 100029;中国石化科技开发部,北京 100029

Institute of Geology and Geophysics Chinese Academy of Sciences, Beijing 100029, China

塔河油田碳酸盐岩储层具有低孔、低渗、非均质性和各向异性强等特点,储层的储、渗机理十分复杂。微电阻率成像(FMI)测井资料能够描述地下岩层的沉积特征,因此,可以依据碳酸盐岩地层的FMI测井响应特征,对碳酸盐岩储层进行评价。介绍了FMI测井解释结果的多种地质应用;给出了常规测井资料和FMI测井资料对岩心的深度归位和空间方位归位的方法原理和实现步骤;利用统计方法建立了裂缝参数的定量估算关系;通过与常规测井等资料的对比,建立了储层分级标准,并利用FMI测井资料对储层进行了分级。多口井的应用结果表明,利用FMI成像测井资料对缝洞型储层的评价结果与录井油气显示和测试结果较吻合。

Carbonate reservoir in Tahe oilfield that is possessed of porous structures with low porosity, low permeability, strong inhomogeneous and anisotropy characteristics, complex mechanism and characteristics of the porosity and permeability, and results in difficulties of well logging interpretation and reservoir evaluation.The well log responses of the FMI obtained in the carbonate reservoir was analyzed the various applications of the FMI log data. The principle and procedure of correcting the depth on the core data were addressed against. The core photos were detail addressed by using of various conventional and imaging well logs. On the statistical method, the quantitative relationships among fracture parameters and the FMI data are established. Comparison the result from the conventional well logs and other data on the FMI data, showed a criterion of the gra dation of the fractured carbonate formation, and classified the formation into three grades,and it lays a solid foundation for the prediction of the reservoir production.