Hutubi Gas Storage Reservoir Well Test Data Interpretation And Application Study

Transient well test technique is an important method to obtain reservoir behavior parameters and formation pressure.Most of singel wells transient test are interfered from adjacent wells in Hutubi gas storage reservoir injection/production cycl,due to the influence of the peak shaving task,achieving a long time entire shut in test is difficult in the balance date.It is difficult to obtain the accurate reservoir behavior parameters,boundary and pressure data by using the conventional single well transient test interpretation method,so it is necessary to consider the adjacent well interference and implement multiwell test interpretation in Hutubi gas storage reservoir.Based on the geological feature and injection/production history of Hutubi gas storage reservoir,this paper makes a well test interpretation of the test pressure data of 26 wells in the development and gas storage reservoir stage.According to the reservoir behavior parameters of this area from the well log,utilizing the Swift well test software implement well test design,then the various theoretical model charts of the different degree interference conditions are obtained.Compare the actual well test interpretation results with the theoretical model charts to determin the interference degree of every well in the test date Utilizing the Saphir numecial well test software proves the accuracy of the classification result Multiwell test interpretation methods for the various interference conditions of the gas storage reservoir were derived.A set of average formation pressure calculation methods for gas storage reservoir multiwell system was studied.Multiwell test data collection standards in gas storage reservoir were established.The basic parameters such as permeability,wellbore storage coefficient and skin factor were calculated by multiwell test methods.The relationship between flow quantity and radial flow occurrence time were discussed to determine reasonable shut in time which provides the basis for the operation and management of Hutubi gas storage reservoir.Finally,compare the multiwell test interpretation results with the test interpretation results of the conventional well test software to prove the reliability and applicability of the multiwell test interpretation methods.