The Research Of Monitoring Pressure In Condition Of Dense Well Pattern In Sazhong Development Area

Since the exploitation began,Sazhong Development Area has been put into developing undergonebasic well water flooding from spray mining,local area network encryption and injection wells systemadjustment,and development of a comprehensive turn Gaotaizi pumping oil,Sa Portugal once encrypted,secondary encryption,aggregation physical drive,three encryption and other major developmentadjustments. With the implementation of well network encryption,low permeability reservoir developmentand investment in water control measures,such as mining,oil has entered a period of high water cut stage ofdevelopment,several sets of overlapping networks wells,underground water distribution is verycomplex,injection system architecture and oil flow system has undergone a series of changes that not onlychanged the fluid drive, but also to the formation pressure is calculated to bring a series of problems,whichseriously affected the integrity pressure monitoring system,for which the projects carried out under densewell Sazhong Zone condition monitoring system optimization deployment study.The main results obtainedare:Analysis of the basic concepts and the applicability of the current oil calculate formationpressure.Statistical comparison of the zone in the western region Sazhong formation pressure data,indicatethe current pressure evaluation methods can not evaluate the proper pressure level block.The establishmentof a numerical method proposed dense well under steady flow conditions and individual well calculatedconsidering the formation pressure injection ratio on the analytical method,suitable for screening in the areawest of the reservoir pressure calculation method.Consider shut formation pressure test before the court, toestablish a method for determining value under conditions of dense well shut-in well test theories andreasonable time,given the well test analysis method under conditions of dense well.Explains the pressureSazhong Development1999-2011114wells in the western zone recovery testing data,Won the flowcoefficient,permeability,skin factor,wellbore storage coefficient set other parameters,calculate the averagepressure of formation and rational individual wells shut-in time,eventually given a reasonable time periodfor each well shut the network.The establishment of a pressure monitoring system optimization deploymentmodel,a method to optimize the deployment pressure monitoring system and the specific operationalprocedures,determine a reasonable proportion of the Western District of each monitoring wellnetwork,given the pressure monitoring system preferred solution.Research results will help to optimize thedesign pressure monitoring system program to determine the economic rationality of formation pressureand formation parameters,reducing the impact on the oil shut-load capacity,the reservoir pressure tomaximize the effectiveness of the application of monitoring data.