Cristin-resultat-ID: 1898732
Sist endret: 29. april 2021 09:06
NVI-rapporteringsår: 2021
Resultat
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2021

Automatic Measurement of the Dependence on Pressure and Temperature of the Mass Density of Drilling Fluids

Bidragsytere:
  • Eric Cayeux

Bok

SPE/IADC International Drilling Conference and Exhibition 2021
ISBN:
  • 978-1-61399-742-0

Utgiver

Society of Petroleum Engineers
NVI-nivå 1

Om resultatet

Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Publiseringsår: 2021
Antall sider: 21
ISBN:
  • 978-1-61399-742-0

Klassifisering

Fagfelt (NPI)

Fagfelt: Energi
- Fagområde: Realfag og teknologi

Beskrivelse Beskrivelse

Tittel

Automatic Measurement of the Dependence on Pressure and Temperature of the Mass Density of Drilling Fluids

Sammendrag

Drilling fluids are subjected to large variations of pressure and temperature while they are circulated in a well. This span of pressures and temperatures is so large that the mass density of the drilling mud differs from one depth to another. For a precise estimation of the hydrostatic and hydrodynamic pressures, it is therefore important to have a good estimation of the pressure and temperature dependence of the mass density of drilling fluids. Usually, the mass density of drilling fluids is manually measured with a mud balance. The pressure and temperature dependence of the mass density of the fluid, i.e. its PVT behavior, is then estimated based on the PVT behavior of its components and their relative proportions. However, variations in the composition of the fluid mix and uncertainties on the PVT behavior of each components, may lead to inaccuracies. To circumvent these limitations, an apparatus that measures directly and automatically the PVT behavior of the drilling fluid contained in a pit has been designed. The setup measures both the mass density and the speed of sound in the fluid at specific conditions of pressure and temperature. From the speed of sound in the liquid mix, it is possible to estimate the adiabatic compressibility. The device also utilizes a heat exchanger from which the thermal conductivity and specific heat capacity of the drilling fluid can be estimated. Combining the specific heat capacity, thermal conductivity and the adiabatic compressibility, the isothermal compressibility can be calculated. By combining measurements made at different conditions of pressure and temperature, a PVT model of the drilling fluid is estimated. By providing automatically, and on a continuous basis, the actual PVT behavior of drilling fluids, drilling automation systems can gain in precision and at the same time, their configuration can be simplified, therefore making them more accessible to any drilling operation.

Bidragsytere

Eric Cayeux

  • Tilknyttet:
    Forfatter
    ved NORCE Energi ved NORCE Norwegian Research Centre AS
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Resultatet er en del av Resultatet er en del av

SPE/IADC International Drilling Conference and Exhibition 2021.

SPE, Society of Petroleum Engineers. 2021, Society of Petroleum Engineers. Vitenskapelig antologi/Konferanseserie
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