IMECH-IR  > 流固耦合系统力学重点实验室
Investigation on downhole gas-liquid two phase separation and mixing transportation characteristics with high gas fraction
Xing SB(邢树宾)1,2,3; Zhang D3; Xu JY(许晶禹)1,2; Wu YX(吴应湘)1,2; Wang XP4
Source PublicationIOP Conference Series: Earth and Environmental Science
2021-10
PagesIOP:EES_861_3_032083
Conference Name11th Conference of Asian Rock Mechanics Society, ARMS 2021
Conference Date21 October 2021 - 25 October 2021
Conference PlaceBeijing
Abstract

Abstract Produced fluids in oilfields usually contains water, natural gas and other substances. With development of oilfields, formation energy decreases and oil reservoir degases, therefore high gas content wells increase. When the produced liquid is lifted by the Electric Submersible Pump (ESP), high gas content will impact pump working performance, and even leads to cavitation and gas lock, which greatly impact lifting efficiency and interrupt well production. To solve the problems caused by high gas content, this paper puts forward an idea of “separating - mixed transporting”, in which the separating is conducted by a flat deflector, and the mixed transporting is achieved by an ejector. According to this idea, an indoor experimental device and a numerical model were established. Laboratory experiments and numerical simulations were carried out simultaneously. The Euler-Euler multiphase flow model and Reynolds stress turbulence model (RSM) are used in the numerical simulation. It is found that a stable gas core formed by the guide vane appears near the swirl field center, and the gas core width decreases with the gas-liquid mixing flow rate increases. With the increase of inlet void fraction, the gas core width increases gradually. When the inlet gas fraction increases to 70%, the gas core can be taken out by the air pipe to achieve the purpose of complete separation. The distribution of the gas-liquid two-phase in the swirl field and the pressure drop during gas-liquid mixed transportation are compared and analyzed by numerical simulation and experimental testing, it is found that the numerical simulation results are in good agreement with the experimental results, which verifies the rationality of the selection of numerical simulation model. The research results are of great significance to broaden the application scope of ESP in high gas fraction oil wells.

KeywordHigh gas fraction gas-liquid separation gas-liquid mixed transport flat deflector ejector numerical simulation
Language英语
Citation statistics
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/87676
Collection流固耦合系统力学重点实验室
Affiliation1.School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
2.Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
3.Sinopec Research Institute of Petroleum Engineering, Beijing 100101, China
4.Shelfoil Petroleum Equipment &Services Co., Ltd., Sinopec Research Institute of Petroleum Engineering, Dezhou Shandong, 253005, China
Recommended Citation
GB/T 7714
Xing SB,Zhang D,Xu JY,et al. Investigation on downhole gas-liquid two phase separation and mixing transportation characteristics with high gas fraction[C]IOP Conference Series: Earth and Environmental Science,2021:IOP:EES_861_3_032083.
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