Double-channel concentric large-pressure-difference underground separate layer water injection adjusting and controlling device

Abstract

The invention discloses a double-channel concentric large-pressure-difference underground separate layer water injection adjusting and controlling device, and mainly relates to the field of oil exploitation and water injection. The device includes an outer-layer pipe, the outer-layer pipe is provided with a first water inlet, a second water inlet, a first water injection pipe and a second water injection pipe; the first water injection pipe and the second water injection pipe are both located at the positions, close to the bottom, of the outer layer pipe, a first channel is communicated between the first water inlet and the first water injection pipe, a second channel is arranged between the second water inlet and the second water injection pipe, and flow adjusting devices are arranged onthe first water injection pipe and the second water injection pipe. The invention has the beneficial effects that the same water injection system can be used for injecting water into two oil layers with larger pressure difference, the working intensity is reduced, the water injection amount can be adjusted in time, the stability of the oil extraction quality is ensured, and the oil extraction efficiency is improved.

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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