Research on non Plug-in Hydraulic Intelligent Control Technology and Its Application
Water injection allocation is an important means tor oil fields to achieve ettective 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.
nozzle optimizationintelligent water injectionWeizhou Oilfieldhydraulic sub controltesting efficiency
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