Construction And Application Of Devopment Effect Index System For Xinjiang Clastic Rock Reservoir

After long-term waterflooding,clastic rock reservoir in Xinjiang has gradually entered the stage of development with high water cut.The relationship between oil and water is more complex and the distribution of remaining oil is more scattered.The reservoir output is decreasing year by year.It is more difficult to realize long-term stable production of oil fields and further adjustment work.It is an important research project to construct the evaluation index system for the development effect of Xinjiang clastic rock reservoir,to evaluate the development effect and development level,and to further clarify the direction of reservoir development and adjustment,which is also of great significance for maintaining efficient production of oil field.Based on the classification of clastic reservoir in Xinjiang,this paper constructs the evaluation index system of development effect,and creatively evaluates the development effect by normalized thinking.The corresponding results have been obtained:(1)The research summarizes the classification idea of reservoir,and fonns the classification standard suitable for clastic rock reservoir in Xinjiang.The development dynamic characteristics and index variation rules of reservoir from different types are also summarized.(2)Based on reservoir geologic and development characteristics and the current industry standard,the research puts forward some ideas about the new evaluation system to improve the evaluation index system,and proposes the classification key indexes,including primary core index,secondary effect key indexes,tertiary support indexes,and selectes two typical reservoirs,and calculates their evaluation indexes value respectively,which lays the foundation for the later development effect evaluation.(3)On the basis of many factors,numerical simulation and multivariate nonlinear regression method,the recovery model can be regressed,therefore the theoretical recovery is obtained accurately.(4)The relationship between water cut and recovery of theory and practice is determined by numerical simulation method,and the development effect is evaluated by using normalized thinking.This paper predicts future development indexs value,and summarizes the normalized index standard.Then the radar map method is used to evaluate the development effect of water drive reservoir visually and quantitatively,which lays the foundation for defining the direction of reservoir development and adjustment.(5)According to the research results and the idea of evaluating the effect of oilfield development by normalized standard,the "oilfield development effect evaluation software"has been compeleted.