SPE Reservoir Engineering · 1992 · 53 citations · 2 references
EngineeringChemical EngineeringPetroleum EngineeringReservoir CharacterizationReservoir EngineeringWell TestingCondensationCondensation ProcessesFormation TestingGas Well TestingOil Well TestingReservoir Fluid Phase BehaviorFluid CharacterizationFluid Sampling During Formation TestingGas Condensate BehaviorGas Condensate Well TestingPhase-change BehaviorPressure FieldsReservoir Fluid SamplingSampling
Summary The industry has a procedure for stabilizing and sampling retrograde-gas (gas-condensate) wells; however, no investigation of the quality of the samples resulting from this procedure has been published. During sampling, bottomhole flowing pressure (BHFP) typically is less than the dewpoint pressure of the original reservoir gas. This causes condensate liquid to build up in the reservoir around the wellbore. This paper presents the results of a study of the sampling procedure and of the buildup and stability of the condensate ring around the wellbore. A procedure designed to give the best chance of obtaining a representative sample is presented.
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