Study On The Interpretation Method Of Multi-fractured Horizontal Well Interference Test

This paper develops an interference test model between multi-fractured horizontal well(MFHW)and vertical wells,which considers the effect of unequal liquid-production rate of fracture and the interferences from adjacent injection wells on pressure-transient behaviors.Then the solutions of pressure drop are derived on the basis of Green function,Newman product method and superposition principle.Finally type curves of 4 models are developed and sensitivity analysis is further investigated.When the adjacent well is production well,the pressure derivative curves will rise in the later stage,and if there are many production wells,pressure derivative curves will rise step-likely,the magnitude of the rise on pressure derivative curves depends on the productions of adjacent wells.When the adjacent well is injection well,the pressure derivative curves will descend in the later stage,and if there are many injection wells,pressure derivative curves will descend step-likely even descend all the time,the magnitude of the decline on pressure derivative curves depends on the injecting rate of adjacent wells.Then we develops the interpretation method of MFHW interference test.Based on the research results of MFHW interference well test,the well test analysis software for MFHW interference well testing model was developed by using QT,the software includes data loading,data editing processing,flow segment selection,model selection,automatic matching and report output.Finally based on the example of oilfield,a more reliable explanation is obtained,the case study also shows the good practicability and fitting effect of the software.