Characterization of fluids by custom and specialized Pressure-Volume-Temperature testing.
 

Reservoir Fluids Phase Behavior and PVT Analysis

Fluid samples taken to a laboratory provide the only way to study volumetric behavior and chemical properties of formation fluids. Objective of a Pressure-Volume-Temperature (PVT) study is to determine the physical and chemical fluid characteristics to predict its behavior versus pressure and temperature changes.  A PVT study is used to evaluate the hydrocarbon in place at surface conditions, simulate the reservoir fluid behavior during all production processes, and build a production profile associated with a development plan.

Texas OilTech Laboratories offers both standard and customized PVT testing packages for black oil, volatile oil, and gas condensate.

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Customized PVT Package

The customized PVT package consists of the following tests per client’s request.

  • Constant composition expansion (CCE)
  • Constant volume depletion (CVD)
  • Differential liberation expansion (DLE)
  • Separator tests
  • Compositional analysis
  • Viscosity measurements
  • Real-world reservoir conditions—up to 400 oF and 15,000 psi pressure

 

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Customized PVT Study

Texas OilTech Laboratories is an ISO certified laboratory specializing in reservoir fluids analysis (PVT testing). Our ability to create world reservoir conditions – up to 400 °F (200 °C) and 15,000 psi (100 MPa) – enables us to handle difficult problems and to customize analytical testing capabilities that are beyond the scope of other laboratories.

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Standard PVT Package

Texas OilTech Laboratories’ testing capabilities offers a series of standard testing to study the fluid characterization. This package includes the following:

  • Quality check of the fluid samples including opening pressure measurement
  • Determination of bubble point pressure, oil density, compressibility above the bubble point and Y-function below the bubble point by CCE
  • Physical recombination of separator oil and gas to the producing gas-oil ratio (GOR) for separator samples
  • Single stage flash for determination of produced GOR, formation volume factor (FVF), and effluent specific gravity
  • DLE study
  • Reservoir oil viscosity measurements during the depletion study
  • Separator pressure test set-up and first pressure test as required with the DLE study
  • Optimum separator pressure determination at room temperature including up to four single stage flash liberation tests from the bubble point pressure to the specified separator pressures
  • Compositional analysis of the evolved gas and stock tank oil (STO) resulting from the reservoir fluid flash to ambient conditions

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