Method for controlling injection flow through pressure test

Abstract

The invention provides a method for controlling injection flow through pressure test, which belongs to the field of oil and gas. According to the method, separated layer water injection quantity is adjusted and controlled by measuring and controlling a later nozzle pressure of an intelligent water distributor in a separated layer water injection well. Through the adoption of the method provided by the invention, separated layer water distribution task can be wirelessly finished in a remotely controlled way without traditional steel wire tripping and blending, so that working time and construction cost are saved and separated layer blending efficiency is increased; and the method provided by the invention has the advantage of simplicity in operation of a layer-adjusting construction process and is an efficient and advanced separated layer water distribution method with high success rate.

Description

technical field [0001] The invention belongs to the field of petroleum and natural gas, and in particular relates to a method for controlling injection flow by pressure testing. Background technique [0002] In the prior art, the patent No. 200810064336.9 discloses an electromagnetic linear adjustment downhole injection-production flow device. This device uses a steel wire to send a device that can generate electromagnetic shock waves into the required well section underground, and uses the ground preset A good code can adjust the downhole production and injection flow device by transmitting electromagnetic signal instructions, so as to realize the control of the water injection volume. However, this device has the following disadvantages: [0003] (1) The method of using a small winch to lift and lower the steel wire requires installing a blowout preventer before construction, so the workload is heavy, the construction time is long, and there are potential safety hazards; ...

AI Technical Summary

Problems solved by technology

[0003] (1) The method of using a small winch to lift and lower the steel wire requires installing a blowout preventer before construction, so the workload is heavy, the construction time is long, and there are potential safety hazards;

[0004] (2) The electromagnetic transmitter is small in size, light in weight, and the downhole pressure is high, which brings difficulties to the lowering of the instrument;

[0005] (3) For wells with poor well conditions, the steel wire tripping may encounter resistance, and the adjustment of the downhole injection and production flow cannot be completed. In response to this situation, only operational measures are taken to pull out the downhole device, resulting in unnecessary construction , increasing the construction cost

[0006] (4) When the water injection pressure of the surface pipe network system changes, the downhole water distributor cannot be automatically adjusted in time, and it is difficult to stabilize the required water injection volume

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