水平井均衡采油流体控制阀调控规律研究

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

肖晓华 韩硕 赵建国 王国荣

XIAOXiaohua HANShuo ZHAOJianguo WANGGuorong

西南石油大学网络与信息化中心, 四川 成都 610500 西南石油大学机电工程学院, 四川 成都 610500

Network & Information Center, Southwest Petroleum University, Chengdu, Sichuan 610500, China School of Mechanical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China

针对水平井非均衡采油导致油气井寿命短、产量低的技术难题，提出了梯形节流孔的新型流体控制阀，该阀最大节流压差达到2.65 MPa。建立了水平井多层流体控制阀流压仿真模型，该仿真模型考虑了新型流体控制阀的节流性能、安装位置、地层压力分布。研究发现：为实现均衡采油，从趾端到跟端流体控制阀开度逐渐减小，各层段压差越大流体控制阀开度越小，压差在0.01~0.10 MPa，各层开度的最大下降值约为37.2%；各层流体控制阀间距越长，流体控制阀开度越大，阀距在100~500 m，各层开度最大增大值约为2.8%。研究成果为水平井流体控制阀采油管串结构优化设计、生产制度制定、流体控制阀开度的控制提供了理论依据，对促进流体控制阀在水平井的推广及应用具有重要的意义。

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.

10.11885/j.issn.1674-5086.2023.10.20.02