Dual-channel concentric large pressure difference downhole layered water injection regulation and control device

Abstract

The invention discloses a double-channel type concentric large-pressure-difference downhole layered water injection regulation and control device, and mainly relates to the field of oil production water injection. Including an outer pipe, the outer pipe is provided with a first water inlet, a second water inlet, a first water injection pipe, and a second water injection pipe, and the first water injection pipe and the second water injection pipe are located close to the outer pipe. The position of the bottom, the first channel is communicated between the first water inlet and the first water injection pipe, the second channel is communicated between the second water inlet and the second water injection pipe, the first water injection pipe, the second water injection pipe Both water injection pipes are equipped with flow regulating devices. The beneficial effect of the present invention is that it can use the same water injection system to inject water into two layers of oil layers with large pressure difference, which reduces the work intensity, and can adjust the amount of water injection in time to ensure the stability of oil recovery quality and improve the efficiency of oil recovery.

Description

technical field [0001] The invention relates to the field of water injection in oil exploitation, in particular to a dual-channel concentric large-pressure-difference downhole layered water injection regulation and control device. Background technique [0002] In the process of oil extraction, due to the limited low oil reserves, with the continuous extraction of oil, the pressure of the underlying oil reservoir gradually decreases, and the oil gradually becomes viscous and sticky, and the oil cannot be lifted to the ground by self-spraying, so It is usually necessary to inject water into the oil layer to ensure that the oil layer has sufficient pressure to ensure the stability of oil production quality and the efficiency of oil recovery; however, the reservoir pressure of different oil layers varies greatly, and the same water injection system is difficult to adapt to multi-layers with large pressure differences The water injection pressure between the oil layers, and the u...

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Problems solved by technology

[0002] In the process of oil extraction, due to the limited low oil reserves, with the continuous extraction of oil, the pressure of the underlying oil reservoir gradually decreases, and the oil gradually becomes viscous and sticky, and the oil cannot be lifted to the ground by self-spraying, so It is usually necessary to inject water into the oil layer to ensure that the oil layer has sufficient pressure to ensure the stability of oil production quality and the efficiency of oil recovery; however, the reservoir pressure of different oil layers varies greatly, and the same water injection system is difficult to adapt to multi-layers with large pressure differences The water injection pressure between the oil layers, and the use of multiple water injection wells for water injection will cause a huge additional work intensity and waste of resources, and the existing technology cannot track and monitor the water injection situation of the oil layers from time to time during water injection. The adjustment of water volume is not precise enough and perfect

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