Dynamic evaluation model of fault sealing in water drive oilfield
Based on the actual geology and reservoir development data of study area,the fault sealing mechanism and the main factors affecting fault sealing are analyzed.It is clarified that the fault sealing mechanism is the fault rock displacement pressure sealing,and the fault sealing ability is different under different conditions.The main factors affecting the fault sealing are the lithologic jointing condition,fault distance,mudstone spread amount,principal stress,oil and water well configuration and injection-production volume.In view of the fact that the current fault sealing evaluation mostly stays at the static level,this paper deduces and establishes a set of dynamic evaluation mathematical model of fault sealing for developed water drive oil reservoir based on layer,considering the oil and water well production split,fault dip angle and other indicators.The lateral sealing and longitudinal stability of faults can be evaluated in real time and quantitatively according to the location of oil and water wells,injection-production and bottom-hole flow pressure.Through the example calculation and comparison with the tracer test results,the coincidence rate of the model determination results is 90.91％,which indicates that the model can be used to calculate the dynamic fault sealing of complex fault-block oilfield.
万方数据
维普
