【摘要】 主要目的层葡一组油层沉积环境属于三角洲前缘相水下分流河道沉积,砂层薄且横向变化快,现有井网控制程度低,采用测井约束地震反演结果精度达不到开发要求。本文提出在相控下将所掌握的地质知识与概率统计学方法相结合,应用随机模拟算法在目的层内均匀准确地建立伪井,并与实际钻井资料协同建模进行高分辨率薄互层井约束反演预测储层。其结果经钻井证实,钻遇砂岩厚度符合率达76%,钻遇有效厚度符合率达73%,表明该方法能够真实反映地层信息,提高薄差储层预测精度。更多还原

【Abstract】 The sedimentary environment of the main objective formation Pu I is delta-front deposit is characterized by thin sand and frequent change in horizon. The control extent for existing well pattern is low and the precision of logging constrained inversion for seismic data could not meet requirement for development. On the basis of facies-control and combining geology with probability statistics,the authors proposed to establish pseudo-well model in objective formation and make reservoir prediction by using random simulation method and by means of constrained inversion of high resolution for thin interbed between true and Pseudo-wells. The results have been proved by drilling practice that the coincident rate reached 76% for drilling sandbody thickness,the coincident rate reached 73% for drilling virtual sandbody thickness. This method can precisely predict stratigraphic information and improve the prediction accuracy of thin and poor reservoir.更多还原