Jidong Injection Wells In Low Permeability Reservoir Water Absorption Capacity Variation Study

Low permeability reservoir there is often a high injection pressure,injection difficult problems,the key to solving water problems lies in a correct understanding of reservoir characteristics,specifically its seepage law.And low permeability reservoir seepage often deviates from Darcy's law presents obvious non-linear flow characteristics,this paper carried out a description of the nonlinear flow characteristics of injection wells related research.In this paper,for high water Jidong Oilfield start Shennan high pressure water injection difficult to do analysis and research.From the start of dynamic injection,short-core,stitching long core,parallel long core displacement experiment and other groups,according to the experimental results of the initial physical model.Based on a physical model of the motion model based on nonlinear seepage and fitting parameters chart.Using the motion model,the mathematical derivation,the establishment of a single-phase homogeneous equal thickness constant pressure boundary reservoir mathematical model.Implicit numerical methods for mathematical model is solved with VB language developed for nonlinear flow through Jidong Oilfield water injection water injection dynamic analysis spreadsheet software.The Oilfield data,well log interpretation results and some parameters input software,according to data pulled out of the water injection profile testing small absorbent layer,the software comes with a function to calculate the single well generate analysis reports.The report with the water test results were compared,revealing a good start in this block injection well pressure is high,indicating water causes deflection clarifies the near-wellbore region,far from the main flow characteristics of the well region,and given by the relevant Note the proposed measures.The research results,the chart plots the nonlinear flow characteristics Shennan 2mD high above the core,gives semi-empirical formula of this block water and prepared water analysis supporting software,to other low permeability blocks water analysis also have some reference.