Production well test fluid

Production well test fluid is the multiphase wellstream produced during offshore well testing, a mixture of crude oil, gas, condensate, produced water, and entrained sand and solids. On an FPSO or a dedicated well-test vessel it is routed to a two- or three-phase test separator that splits oil, gas, and water for individual measurement, giving well rates, gas-oil ratio, and water cut. The data confirm reservoir deliverability and validate processing capacity before a well is brought into full production. Water cut in the stream commonly ranges from 0 to 80 percent, and high gas fractions drive flaring and venting limits during the test.