Research On Distribution Of The Vertical Reservoir Pressure Under Injection-production Condition

Through the water-flooding development in a long time, reservoir pressure has a great change in time and space in Daqing Oil-field.During well drilling,Predicting longitudinal distribution of reservoir pressure accurately is precondition of Raising well drilling's success rate, lower well drilling's cost, protect hydrocarbon reservoir,so computing the pressure of singlet reservoir is the key of Predicting longitudinal distribution of reservoir pressure. at the moment,the most accurate method of aquiring singlet reservoir pressure is RFT.But it is not suitable for a big scope expansion application.This text studies the method of computing reservoir pressure using fluid mechanics in porous medium, reservoir simulation to establish the mathematical model on the condition of injection-production.though the mathematical model we can compute he singlet oil layer,draw the reservoir vertical pressure profile.This method doesn't need addional devotion,and don't delay drilling production.By building a set of geology production database,and manage the production data reasonably,and programming to draw vertical pressure profile on the waiting on drilling well,we can certain the time and scope of closing well.By combining the vertical pressure profile and pressure potentiometric map,we can exactly locate the zone and the well which influence the waiting on drilling well.Because there is abnormal pressurized reservoir,we can research it's physical property and pressure property and choose the right adjugement means like draw off decompression,water flooding to keep the pressure,closing well and so on.By researching the methods of adjugement the reservoir pressure,we can decrease the variation range of the reservoir pressure on the waiting on well,raise the safety coefficient,provide the reliable foundation of further well drilling production.By the application of nan-er-qu in Daqing,the computing results using the mathematical model is consistent with the actul production data of oil field development.Drawing the vertical pressure profile by the computer can illustrative and truly reflect the reservior's vertical distribute regular.Using the right adjudgement method on different abnormal pressure reservoir,the result is good.