Time-sharing water injection tubular column and time-sharing water injection method

Abstract

The invention provides a time-sharing water injection tubular column and a time-sharing water injection method. The time-sharing water injection tubular column comprises an indoor control system, a wellhead control cabinet, a hydraulic control pipeline, an oil pipe, hydraulic control layered packers and hydraulic control water distribution devices, wherein the hydraulic control layered packers andthe hydraulic control water distribution devices are multiple; each hydraulic control layered packer sets the corresponding hydraulic control water distribution device in different oil layers, and the hydraulic control water distribution devices pressurize the ground in a stepped mode to achieve opening and closing of water distributors of the different oil layers; the wellhead control cabinet monitors and records the injection amount of the oil layers, remotely transmits the injection amount to the indoor control system and dynamically monitors the pressure of the hydraulic control pipelineat the same time so as to ensure that the pressure is within a reasonable range; and the indoor control system controls the wellhead control cabinet in a wired or wireless mode. According to the time-sharing water injection tubular column and the time-sharing water injection method, the corresponding water distribution device is started according to the ground pressing condition, a ground flow device meters the flow of an injection layer, and layered intermittent injection of a water injection well is achieved.

Description

technical field [0001] The invention relates to the technical field of underground water injection pipe strings for oil production, in particular to a time-division water injection pipe string and a time-division water injection method. Background technique [0002] Oilfields such as Shengli and Daqing have entered the period of ultra-high water-cut development, and the interlayer contradictions between oil and water wells have become more and more prominent. Water injection has rushed along the high-permeability layer, which has affected the development of the remaining oil in the low-permeability layer to a certain extent. Currently commonly used concentric and eccentric measurement and adjustment integration technology and intelligent water injection measurement and adjustment technology cannot effectively adjust large pressure difference water injection wells. In order to better meet the separate injection requirements of large pressure difference water injection wells a...

AI Technical Summary

Problems solved by technology

Although this device can solve the problem of underground power supply, it also requires a large number of microelectronic components, and the contradiction between the working life of the components and the working temperature is becoming more and more prominent. At the same time, the device needs to be installed separately with the control cable, and the operating cost is relatively high.

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