Investigation of Gas-liquid Separation Experiment of Electric Pump Drainage and Gas Extraction Unit in High Gas-liquid Ratio Gas Wells

• Published in: Journal of physics. Conference series Vol. 2659; no. 1; pp. 12033 - 12041
• Main Authors: Zhang, Bao, Jing, Hongtao, Tu, Zhixiong, Cui, Hangbo, Bai, Xiaofei, Zhou, Huaiguang, Yu, Xiaotong, Fan, Dabin, Xue, Longlong, Liu, Taochou
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.12.2023
• Subjects: Drainage; Gas recovery; Gas wells; Permanent magnets; Physics; Respiration; Separation; Structural design
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/2659/1/012033

Abstract Given the prominent problem of water in the Tarim basin of China with high formation temperature and large water production, a preferred scheme of electric pump drainage and gas extraction unit for gas fields with a high gas-liquid ratio is proposed by the mechanical principle and structural design method. Then, the corresponding electric pumps were developed, and the drainage and gas extraction scheme of a permanent magnet electric pump unit with gas-liquid separation in the way of an inverted deflector is designed. Through indoor experiments simulating the downhole gas-liquid ratio environment, the gas-liquid separation ability and adaptability of the design scheme under different good conditions are verified. The results obtained demonstrate that the cable connection process can meet the requirements of high-pressure resistance (≥25 MPa), and the gas-liquid separation effect is very good in vertical wells by adopting the inverted deflector scheme. The separation effect exceeded 90% under different working conditions (production from 30 to 150 m 3 /day and inhalation gas-liquid ratio from 50% to 95% and even higher) in the experiment with high gas content. The results will promote the gas recovery rate of high gas-liquid ratio gas fields and improve extraction efficiency.