Well Test Theory And The Average Formation Pressure Calculation Method Of Dense Well Pattern In F Oilfield

Since F oilfield was put into production,it has experienced development and adjustment measures,such as elastic dissolved gas flooding,the first infill adjustment,the second infill adjustment and the third infill adjustment.After multiple fracturing and infill well pattern deployment,it makes well spacing and the distance between two rows gradually reducing,the interference between wells serious.The existing well test interpretation method is no longer applicable.What's more,the adjustment measures also make the current calculation method of formation pressure can not accurately reflect the real formation energy level,which bring difficulties to the oilfield development.First,based on the statistics of the test data of F oilfield,the well test curves are drawn and systematically analyzed,and the characteristics of well test curves are defined.Combined with the characteristics of the reservoir and the well test curve,well test theory model of fractured well and non-fractured well are established and solved.The typical curve of well test is drawn and the influencing factors are analyzed.Then,the well test interpretation method and the determination method of reasonable shut time are given.Second,the principle and applicability of formation pressure calculation in F oilfield are analyzed.The principle and applicability of current formation pressure calculation method in F oilfield are analyzed.Based on the study of well test interpretation and reasonable shut time,a new method for calculating formation pressure of oil wells and water wells under dense well pattern in F oilfield is established.Finally,combined with the actual data of examples,the well test data is interpreted by using the well test interpretation.The average formation pressure and reasonable shut time are determined.The results of this study can reduce the effect of pressure on the output.On this basis,the calculation method of formation pressure can provide a theoretical basis for the next development and adjustment of the oil field.