Gas Solubility Measurement in Heavy Oil and Extra Heavy Oil at Vapor Extraction (VAPEX) Conditions
Измерение растворимости газов в тяжёлом и сверхтяжёлом нефти при условиях паровой экстракции (VAPEX)
2013-04-01
SCID: 54.1/5adazj76
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PVT cellVAPEX conditionsbubble point measurementgas solubilityheavy oil
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Abstract (AI)
A pressure–volume–temperature ( PVT ) cell has been developed for measuring light gas solubility in heavy oils and bitumen under pressure. It uses a magnetic stirrer designed to stir the fluid in a laminar way within oil with a viscosity up to 55 000 cP. Because of this stirring system, recombination of heavy oil and gas is achieved in less than 2 h. The apparatus was used to quantify the solubility of carbon dioxide and methane in two heavy oils. One is coming from Canada, and the other is coming from Venezuela. The experiments were conducted by adding solvent into the oil and recombining the system by pressurization with a full laminar stirring. Finally, solubility data were obtained by measuring the bubble pressure of the recombined fluid. This was achieved by determining the change of the PV slope during an isothermal decompression. Measurements were performed for various contents of gases and different temperatures ranging between 293 and 353 K.
Key Findings
1
A PVT cell with a magnetic laminar stirrer was developed to measure light gas solubility in heavy oils and bitumen under pressure.
2
Bubble pressure of recombined fluids was determined from changes in the PV slope during isothermal decompression to obtain solubility data.
3
Measurements were performed across varying gas contents and temperatures between 293 K and 353 K.
4
Solubility of CO2 and CH4 was quantified in two heavy oils (Canada and Venezuela) using solvent addition and pressurization with full laminar stirring.
5
The laminar stirring system enables recombination of heavy oil and gas in less than 2 hours for viscosities up to 55,000 cP.
Research Object
Light gas (carbon dioxide and methane) dissolved in heavy oils and bitumen under VAPEX conditions
Research Subject
Measurement/quantification of gas solubility (CO2 and CH4) in heavy oils/bitumen using a PVT cell with laminar magnetic stirring, determined from bubble pressure via PV slope changes during isothermal decompression across 293–353 K
Publication Details
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2013-04-01
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