Method for water detection, out-flow and blocking for switch in production state of oil well

Abstract

The invention relates to a method for oil production wells in the production state of a switch to seek production, find water and shut off water. In the method, a micro-motor control switch is placed in the layer section of water search, production and water shutoff, and the two ends of the switch are respectively Equipped with a packer, the shell of the motor control part is connected above the liquid inlet and outlet channel through a screw, so that the switch rod at the front end of the motor can move forward or backward to close or open the liquid inlet and outlet channel of this layer when the motor is rotating forward or reverse ;The switch is divided into two periods of water search and production and water blocking. In the water search and production period, the switch is a timing switch, and the time switch is performed through the set water search schedule; in the water blocking period, the switch needs to To change the state from on to off or from off to on, two conditions must be met at the same time: ①The switch is in the allowed working period in the set water blocking time table; ②A pressure pulse signal is received. The invention realizes automatic water finding, production seeking and time-sharing management of the water blocking process with the simplest signal under the production state.

Description

technical field [0001] The invention relates to a method for finding water by layer, seeking production by layer and shutting off water by layer in the process of oil and gas exploitation in an oil field, and in particular relates to a method for finding water by switching on and off an oil production well, asking for production and shutting off water in a production state. Background technique [0002] In the late stage of oilfield exploitation, layered oil recovery and related water-seeking and water-plugging methods are one of the important measures to reduce water cut. "A Downhole Pipe String and Its Implementing Technology for Multi-layer Repetitive Layer-adjusting Oil Production with Non-moving String" discloses a method for multi-layer changing layer production. The switch controller is driven from bottom to top by the reversing switch through the upper lifting rod. It can change the switch state of the layer once, so as to achieve the purpose of changing layer produc...

AI Technical Summary

Problems solved by technology

The disadvantage is that the lag and inertia caused by transmitting the signal from the pump truck at the wellhead to the position of the switch over a kilometer will bring certain difficulties to the time control of each pressure wavelength, and improper operation will easily lead to errors. code

In the absence of dual-function communication conditions, whether there is a code error cannot be fed back to us; and because the pressure information at the wellhead appears randomly, the control circuit of the switch can only be in the waiting signal state or working state all the time. Links can not use power saving mode

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