A Study on the Control Law of Fluid Control Valve for Balanced Production in Horizontal Wells

doi:10.11885/j.issn.1674-5086.2023.10.20.02

Abstract

Abstract: Aiming at the technical problems of short life and low production of oil and gas wells caused by unbalanced production of horizontal wells, a new fluid control valve with trapezoidal orifice is proposed, and the maximum throttling pressure difference of the valve reaches 2.65 MPa. The flow pressure simulation model of multi-layer fluid control valve for horizontal well is established, which considers the throttling performance, installation size and formation pressure distribution of the new fluid control valve. It is found that in order to achieve balanced oil production, the opening of the fluid control valve gradually decreases from toe to heel. The greater the pressure difference of each layer, the smaller the opening of the fluid control valve. The pressure difference is between 0.01~0.10 MPa, and the maximum reduction of the opening of each layer is about 37.2%. The longer the distance between the fluid control valves in each layer, the greater the opening of the fluid control valve. The valve distance is between 100 m and 500 m, and the maximum increase of the opening in each layer is about 2.8%. The research results provide a theoretical basis for the optimization design of the production string structure of the fluid control valve in horizontal wells, the formulation of the production system, and the control of the opening of the fluid control valve, which is of great significance for promoting the popularization and application of the fluid control valve in horizontal wells.

Key words: horizontal well, balanced production, fluid control valve, numerical simulation, flow field simulation

CLC Number:

TE355

XIAO Xiaohua, HAN Shuo, ZHAO Jianguo, WANG Guorong. A Study on the Control Law of Fluid Control Valve for Balanced Production in Horizontal Wells[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2025, 47(4): 155-164.

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