Transientratedeclinecurveanalysisforconstantpressureproductionispresentedinthispaperforanaturallyfracturedreservoir.Thisapproachisbasedonexponentialandconstantbottom-holepressuresolution.Basedonthismethod,whenln(flowrate)isplottedversustime,twostraightlinesareobtainedwhichcanbeusedforestimatingdifferentparametersofanaturallyfracturedreservoir.Parameterssuchasstoragecapacityratio(ω),reservoirdrainagearea(A),reservoirshapefactor(C_A),fracturepermeability(k_f),interporosityflowparameter(λ)andtheotherparameterscanbedeterminedbythisapproach.TheequationsarebasedonamodeloriginallypresentedbyWarrenandRootandextendedbyDaPratetal.andMavorandCinco-Ley.Theproposedmethodhasbeendevelopedtobeusedfornaturallyfracturedreservoirswithdifferentgeometries.Thismethoddoesnotinvolvetheuseofanychartandbyusingthepseudosteadystateflowregime,theinfluenceofwellborestorageonthevalueoftheparametersobtainedfromthistechniqueisnegligible.Inthistechnique,alltheparameterscanbeobtaineddirectlywhileinconventionalapproachesliketypecurvematchingmethod,parameterssuchasωandλshouldbeobtainedbyothermethodslikebuild-uptestanalysisandthisisoneofthemostimportantadvantagesofthismethodthatcouldsavetimeduringreservoiranalyses.Differentsimulatedandfieldexampleswereusedfortestingtheproposedtechnique.Comparisonbetweentheobtainedresultsbythisapproachandtheresultsoftypecurvematchingmethodshowsahighperformanceofdeclinecurvesinwelltesting.
