Study On Improvement And Application Of Dynamic Analysis Method For Immersion In Abnormal High Pressure Gas Reservoir

Water invasion is the key problems which related to the stable production of gas reservoir, and water invasion dynamic analysis is a difficult point through the whole of gas reservoir development and dynamic analysis,which has been studied all the time by many scholars at home and abroad. For abnormal high pressure gas reservoir, the compaction effect of reservoir stratum during the process of development of reservoir, cause the dynamic analysis more complex, also make the result of original conventional methods in the analysis big error.According to the practical problems, this paper get KeLa2 gas reservoir as the research object, then make so a lot of specific improvement work to the nonlinear material balance method and AIF water influence function method, as it can meet the calculation of abnormal high pressure gas reservoir conditions. And at the same time, the sensitivity of the static and dynamic parameters involved with the two methods was discussed strictly.On this basis, the differences original method and improved method were comparised and analysed, and the mothod were analyzed and conformed by using the actual dynamic KeLa2 gas reservoir data.In the research work, the improved nonlinear material balance method and AIF water influence function-method procedure were redesigned and the software was developed then, the software was also used of the analysis of KeLa2 gas field pressure dynamic and water invasion dynamic. According to the calculated results, water invasion mode and mechanism of gas wells were detailedly analysed combined with KeLa2 gas reservoir geological characteristics and dynamic production characteristics.The research result has been applied in the actual development adjustment in the work, and has the obvious economic and practical value.