Feasibility Study on Downhole Gas–Liquid Separator Design and Experiment Based on the Phase Isolation Method

As oil exploitation enters its middle and late stages, formation pressure drops, and crude oil degases. In production profile logging, the presence of the gas phase will affect the initial oil–water two-phase flowmeter’s flow measurement results. In order to eliminate gas-phase interference and redu...

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Autores principales:	Yuntong Yang, Zhaoyu Jiang, Lianfu Han, Wancun Liu, Xingbin Liu, Gang Deng
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	downhole gas–liquid separator (DGLS) gas–water two-phase flow multiphase flow separation efficiency Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/0d728437409f403888d712de816c0d2b
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spelling	oai:doaj.org-article:0d728437409f403888d712de816c0d2b2021-11-11T15:26:07ZFeasibility Study on Downhole Gas–Liquid Separator Design and Experiment Based on the Phase Isolation Method10.3390/app1121104962076-3417https://doaj.org/article/0d728437409f403888d712de816c0d2b2021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/10496https://doaj.org/toc/2076-3417As oil exploitation enters its middle and late stages, formation pressure drops, and crude oil degases. In production profile logging, the presence of the gas phase will affect the initial oil–water two-phase flowmeter’s flow measurement results. In order to eliminate gas-phase interference and reduce measurement costs, we designed a downhole gas–liquid separator (DGLS) suitable for low flow, high water holdup, and high gas holdup. We based it on the phase isolation method. Using a combination of numerical simulation and fluid dynamic measurement experiments, we studied DGLS separation efficiency separately in the two cases of gas–water two-phase flow and oil–gas–water three-phase flow. Comparative analysis of the numerical simulation calculation and dynamic test results showed that: the VOF model constructed based on <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>k</mi><mo>−</mo><mi>ε</mi></mrow></semantics></math></inline-formula> the equation is nearly identical to the dynamic test, and can be used to analyze DGLS separation efficiency; the numerical simulation results of the gas–water two-phase flow show that when the total flow rate is below 20 m<sup>3</sup>/d, the separation efficiency surpasses 90%. The oil–gas–water three-phase’s numerical simulation results show that the oil phase influences separation efficiency. When the total flow rate is 20 m<sup>3</sup>/d–50 m<sup>3</sup>/d and gas holdup is low, the DGLS’s separation efficiency can exceed 90%. Our experimental study on fluid dynamics measurement shows that the DGLS’s applicable range is when the gas mass is 0 m<sup>3</sup>/d~15 m<sup>3</sup>/d, and the water holdup range is 50%~100%. The research presented in this article can provide a theoretical basis for the development and design of DGLSs.Yuntong YangZhaoyu JiangLianfu HanWancun LiuXingbin LiuGang DengMDPI AGarticledownhole gas–liquid separator (DGLS)gas–water two-phase flowmultiphase flowseparation efficiencyTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10496, p 10496 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	downhole gas–liquid separator (DGLS) gas–water two-phase flow multiphase flow separation efficiency Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	downhole gas–liquid separator (DGLS) gas–water two-phase flow multiphase flow separation efficiency Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Yuntong Yang Zhaoyu Jiang Lianfu Han Wancun Liu Xingbin Liu Gang Deng Feasibility Study on Downhole Gas–Liquid Separator Design and Experiment Based on the Phase Isolation Method
description	As oil exploitation enters its middle and late stages, formation pressure drops, and crude oil degases. In production profile logging, the presence of the gas phase will affect the initial oil–water two-phase flowmeter’s flow measurement results. In order to eliminate gas-phase interference and reduce measurement costs, we designed a downhole gas–liquid separator (DGLS) suitable for low flow, high water holdup, and high gas holdup. We based it on the phase isolation method. Using a combination of numerical simulation and fluid dynamic measurement experiments, we studied DGLS separation efficiency separately in the two cases of gas–water two-phase flow and oil–gas–water three-phase flow. Comparative analysis of the numerical simulation calculation and dynamic test results showed that: the VOF model constructed based on <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>k</mi><mo>−</mo><mi>ε</mi></mrow></semantics></math></inline-formula> the equation is nearly identical to the dynamic test, and can be used to analyze DGLS separation efficiency; the numerical simulation results of the gas–water two-phase flow show that when the total flow rate is below 20 m<sup>3</sup>/d, the separation efficiency surpasses 90%. The oil–gas–water three-phase’s numerical simulation results show that the oil phase influences separation efficiency. When the total flow rate is 20 m<sup>3</sup>/d–50 m<sup>3</sup>/d and gas holdup is low, the DGLS’s separation efficiency can exceed 90%. Our experimental study on fluid dynamics measurement shows that the DGLS’s applicable range is when the gas mass is 0 m<sup>3</sup>/d~15 m<sup>3</sup>/d, and the water holdup range is 50%~100%. The research presented in this article can provide a theoretical basis for the development and design of DGLSs.
format	article
author	Yuntong Yang Zhaoyu Jiang Lianfu Han Wancun Liu Xingbin Liu Gang Deng
author_facet	Yuntong Yang Zhaoyu Jiang Lianfu Han Wancun Liu Xingbin Liu Gang Deng
author_sort	Yuntong Yang
title	Feasibility Study on Downhole Gas–Liquid Separator Design and Experiment Based on the Phase Isolation Method
title_short	Feasibility Study on Downhole Gas–Liquid Separator Design and Experiment Based on the Phase Isolation Method
title_full	Feasibility Study on Downhole Gas–Liquid Separator Design and Experiment Based on the Phase Isolation Method
title_fullStr	Feasibility Study on Downhole Gas–Liquid Separator Design and Experiment Based on the Phase Isolation Method
title_full_unstemmed	Feasibility Study on Downhole Gas–Liquid Separator Design and Experiment Based on the Phase Isolation Method
title_sort	feasibility study on downhole gas–liquid separator design and experiment based on the phase isolation method
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/0d728437409f403888d712de816c0d2b
work_keys_str_mv	AT yuntongyang feasibilitystudyondownholegasliquidseparatordesignandexperimentbasedonthephaseisolationmethod AT zhaoyujiang feasibilitystudyondownholegasliquidseparatordesignandexperimentbasedonthephaseisolationmethod AT lianfuhan feasibilitystudyondownholegasliquidseparatordesignandexperimentbasedonthephaseisolationmethod AT wancunliu feasibilitystudyondownholegasliquidseparatordesignandexperimentbasedonthephaseisolationmethod AT xingbinliu feasibilitystudyondownholegasliquidseparatordesignandexperimentbasedonthephaseisolationmethod AT gangdeng feasibilitystudyondownholegasliquidseparatordesignandexperimentbasedonthephaseisolationmethod
_version_	1718435288508792832

Feasibility Study on Downhole Gas–Liquid Separator Design and Experiment Based on the Phase Isolation Method

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