Cooperative optimization of plunger structure and gas injection scheme based on CFD
基于CFD 的柱塞结构与注气制度协同优化
Ban H. Jia H. Zhou H. Wei J.
2025Well Testing
Well Testing
2025#34Issue 624 - 30 pp.
In the Zananor oilfield, Kazakhstan, some wells employing plunger gas lift systems face issues such as high gas injection, low liquid lifting capacity, and unstable operation. These problems stem from a lack of quantitative coupling between plunger structure and gas injection cycles, and a reliance on empirical adjustments to the gas injection scheme. Focusing on plunger gas lift wells, a fullcycle dynamic model of the plunger gas lift process was established. By introducing a structural disturbance coefficient and conducting CFD simulations on three characteristic plunger types, the nonlinear relationship between plunger lifting velocity and gas injection rate was revealed, on the basis of which a coupling model was developed. Furthermore, with the objective of minimizing energy consumption per unit volume lifted, a cooperative optimization model integrating plunger structure and gas injection scheme was established. Field tests demonstrate that the well operating cycles became more stable, with a 19. 4% average increase in daily oil production alongside a 13. 2% average reduction in daily gas injection volume. These findings provide technical support for transitioning plunger lift operations from experience-based to mechanism-driven and parameterized control, offering promising potential for broader application.
CFD simulation , Cooperative optimization , Disturbance coefficient , Gas injection scheme , Plunger gas lift , Plunger structure , Zananor oilfield
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PetroChina Tuha Oilfield Branch Oil Production Technology Research Institute, Xinjiang, Hami, 839000, China
China Petroleum Aktobe Oil and Gas Co., Ltd., Aktobe, 030012, Kazakhstan
PetroChina Tuha Oilfield Branch Oil Production Technology Research Institute
China Petroleum Aktobe Oil and Gas Co.
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