Abstract
Presented here is experimental and theoretical work on phase transitions and separation time scales for CO2–crude oil mixtures with CO2 content ranging from pure to 79 mol %. The experimental work ...
Highlights
The fluid systems used were comprised of mixtures containing carbon dioxide (CO2) from VWR with a purity of 99.7%; Exxsol D80 from ExxonMobile Petroleum and Chemical BVBA/Esso Norge, which is a dearomatized (
SINTEF’s wheel flow loop was used to obtain experimental data on phase properties such as volume fractions of phases present under given conditions and the temperature and pressure at which phase transitions occurred for the relevant fluid systems
The experimental values were compared with predicted phase diagrams from a Cubic Plus Associating (CPA) equation of state with Multiflash for the relevant compositions
Summary
The transport of CO2rich fluids through pipelines has become increasingly relevant due to increased focus on carbon capture and storage (CCS). Technologies and enhanced oil recovery (EOR) by CO2 flooding.[1] In oil and gas fields where CO2-rich gas reinjection (for storage and/or CO2 flooding purposes) takes place, back production of CO2 increases its content in the well stream. Reinjection of CO2 for EOR is considered attractive for some Brazilian presalt fields[4] but is expected to increase the CO2 concentration and GOR in production fluids in the future.[10]
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