非插入式液压智能分控技术研究与应用

doi:10.11885/j.issn.1674-5086.2022.04.12.01

摘要/Abstract

摘要： 注水调配是油田实现注水井有效注水的重要手段。目前，涠洲海域多采用裸眼射孔完井，注水管柱为桥式偏心管柱或同心集成管柱，注水层位平均 4～6 层。井眼轨迹复杂，狗腿度大，需要依靠钢丝作业投捞水嘴完成调配，作业难度大、时间长、成功率偏低，且占用井口影响高产井作业。为提高智能化和精细化，设计了非插入式液压分控注水管柱以及配套的液压控制智能注水工具，可依靠地面控制系统完成地面智能在线测调。建立配水器水嘴模型，通过实验确定摩擦系数，精确描述流量压力关系，提高分注精度。通过管柱设计和管柱摩阻计算，在涠洲 6-13 油田 A6 井进行了非插入式液压智能分控技术应用，实现了液压精细分控，突破了温度高、井眼轨迹复杂、井深大的应用难题，测调效率提高了 90%，分注精度达到油藏指标的 95%

关键词: 水嘴优化, 智能注水, 涠洲油田, 液压分控, 测调效率

Abstract: Water injection allocation is an important means for oil fields to achieve effective water injection into wells. At present, open hole perforation completion is commonly used in the Weizhou sea area, and the water injection string is a bridge type eccentric or concentric integrated string, with an average water injection of 4～6 layers. The wellbore trajectory is complex and the dog legs are large, requiring the use of steel wire operations to complete the deployment of the fishing nozzle. The operation is difficult, time-consuming, and the success rate is low, and the occupation of the wellhead affects the high-yield well operation. In order to improve intelligent and refined operations, a non plug-in hydraulic sub control water injection column and supporting hydraulic control intelligent water injection tools have been designed, which can rely on the ground control system to complete intelligent online ground testing and adjustment. A water distributor nozzle model is established and the friction coefficient is determined through experiments, the flow pressure relationship is accurately described and the injection accuracy is improved. The application has been completed in Well A6 of Weizhou 6-13 Oilfield, achieving hydraulic fine separation and control, breaking through the application challenges of high temperature, complex wellbore trajectory, and large well depth. The testing and adjustment efficiency has been improved by 90%, and the injection accuracy has reached 95% of the reservoir index.

Key words: nozzle optimization, intelligent water injection, Weizhou Oilfield, hydraulic sub control, testing efficiency

中图分类号:

TE934

葛嵩, 袁辉, 于志刚, 李新妍. 非插入式液压智能分控技术研究与应用[J]. 西南石油大学学报(自然科学版), 2024, 46(3): 109-116.

GE Song, YUAN Hui, YU Zhigang, LI Xinyan. Research on non Plug-in Hydraulic Intelligent Control Technology and Its Application[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2024, 46(3): 109-116.

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