Experiment and Simulation Study on the Special Phase Behavior of Huachang Near-Critical Condensate Gas Reservoir Fluid

Due to the special phase behavior of near-critical fluid, the development approaches of near-critical condensate gas and near-critical volatile oil reservoirs differ from conventional oil and gas reservoirs. In the near-critical region, slightly reduced pressure may result in considerable change in...

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Main Authors: Dali Hou, Yang Xiao, Yi Pan, Lei Sun, Kai Li
Format: Article
Language:English
Published: Wiley 2016-01-01
Series:Journal of Chemistry
Online Access:http://dx.doi.org/10.1155/2016/2742696
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author Dali Hou
Yang Xiao
Yi Pan
Lei Sun
Kai Li
author_facet Dali Hou
Yang Xiao
Yi Pan
Lei Sun
Kai Li
author_sort Dali Hou
collection DOAJ
description Due to the special phase behavior of near-critical fluid, the development approaches of near-critical condensate gas and near-critical volatile oil reservoirs differ from conventional oil and gas reservoirs. In the near-critical region, slightly reduced pressure may result in considerable change in gas and liquid composition since a large amount of gas or retrograde condensate liquid is generated. It is of significance to gain insight into the composition variation of near-critical reservoir during the depletion development. In our study, we performed a series of PVT experiments on a real near-critical gas condensate reservoir fluid. In addition to the experimental studies, a commercial simulator combined with the PREOS model was utilized to study retrograde condensate characteristics and reevaporation mechanism of condensate oil with CO2 injection based on vapor-liquid phase equilibrium thermodynamic theory. The research shows that when reservoir pressure drops below a certain pressure, the variation of retrograde condensate liquid saturation of the residual reservoir fluid exhibits the phase behavior of volatile oil.
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institution Kabale University
issn 2090-9063
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language English
publishDate 2016-01-01
publisher Wiley
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series Journal of Chemistry
spelling doaj-art-28cbde8816e74a2e8c9a805fdc5501be2025-02-03T06:12:44ZengWileyJournal of Chemistry2090-90632090-90712016-01-01201610.1155/2016/27426962742696Experiment and Simulation Study on the Special Phase Behavior of Huachang Near-Critical Condensate Gas Reservoir FluidDali Hou0Yang Xiao1Yi Pan2Lei Sun3Kai Li4School of Energy, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaSchool of Energy, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum, University of Technology, Chengdu, Sichuan 610500, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum, University of Technology, Chengdu, Sichuan 610500, ChinaSchool of Energy, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaDue to the special phase behavior of near-critical fluid, the development approaches of near-critical condensate gas and near-critical volatile oil reservoirs differ from conventional oil and gas reservoirs. In the near-critical region, slightly reduced pressure may result in considerable change in gas and liquid composition since a large amount of gas or retrograde condensate liquid is generated. It is of significance to gain insight into the composition variation of near-critical reservoir during the depletion development. In our study, we performed a series of PVT experiments on a real near-critical gas condensate reservoir fluid. In addition to the experimental studies, a commercial simulator combined with the PREOS model was utilized to study retrograde condensate characteristics and reevaporation mechanism of condensate oil with CO2 injection based on vapor-liquid phase equilibrium thermodynamic theory. The research shows that when reservoir pressure drops below a certain pressure, the variation of retrograde condensate liquid saturation of the residual reservoir fluid exhibits the phase behavior of volatile oil.http://dx.doi.org/10.1155/2016/2742696
spellingShingle Dali Hou
Yang Xiao
Yi Pan
Lei Sun
Kai Li
Experiment and Simulation Study on the Special Phase Behavior of Huachang Near-Critical Condensate Gas Reservoir Fluid
Journal of Chemistry
title Experiment and Simulation Study on the Special Phase Behavior of Huachang Near-Critical Condensate Gas Reservoir Fluid
title_full Experiment and Simulation Study on the Special Phase Behavior of Huachang Near-Critical Condensate Gas Reservoir Fluid
title_fullStr Experiment and Simulation Study on the Special Phase Behavior of Huachang Near-Critical Condensate Gas Reservoir Fluid
title_full_unstemmed Experiment and Simulation Study on the Special Phase Behavior of Huachang Near-Critical Condensate Gas Reservoir Fluid
title_short Experiment and Simulation Study on the Special Phase Behavior of Huachang Near-Critical Condensate Gas Reservoir Fluid
title_sort experiment and simulation study on the special phase behavior of huachang near critical condensate gas reservoir fluid
url http://dx.doi.org/10.1155/2016/2742696
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AT yipan experimentandsimulationstudyonthespecialphasebehaviorofhuachangnearcriticalcondensategasreservoirfluid
AT leisun experimentandsimulationstudyonthespecialphasebehaviorofhuachangnearcriticalcondensategasreservoirfluid
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