Water injection well umbilical pipe full-horizon injection regulation device

Abstract

The invention provides a water injection well umbilical pipe full-horizon injection regulation device, which comprises an injection regulation control cabinet (1), a special christmas tree (2), an umbilical pipe column (3) and a water distribution device (4). The water injection well umbilical pipe full-horizon injection regulation device has the advantages that injection water is branched and divided on the ground and enters underground branch pipes, one branch of water occupies one branch pipe, the structural complexity of the traditional injection regulation device can be effectively simplified and the oil field exploitation cost is reduced by adopting the structure layout, and in addition, water injection flow and pressure of all underground horizons of the water injection well can be accurately regulated; and a controller is arranged in the injection regulation control cabinet, the flow of each branch pipe, an underground hydraulic packer and a backwash pump can be automatically controlled via the controller, and the device of the invention has the advantages of high automation degree, simple operation, and low cost; and the umbilical pipe bundle and the water injection pipe column adopt a segmented setting scheme, working condition requirements of water injection wells of different depths can be met, and the construction is convenient.

Description

technical field [0001] The technology of the invention belongs to the technical field of oilfield development, and in particular relates to a full-layer injection control device for an umbilical pipe of a water injection well. Background technique [0002] Water injection oil production refers to the measures to inject water into the oil reservoir through special water injection wells during the oil field development process to maintain the pressure of the oil layer, so that the oil reservoir has a strong driving force, so as to improve the oil reservoir production speed and recovery rate. [0003] With the deepening of oilfield development, due to differences in pressure, physical properties of oil layers, and crude oil properties among oil layers, they often interfere with each other, so that some oil layers cannot play their due roles. In order to reduce or eliminate interlayer interference, layered water injection schemes are generally adopted, so as to improve water inj...

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Problems solved by technology

[0004] The existing layered water injection scheme means that the water injection string enters each water-absorbing layer after branching at the bottom of the well. The problem of limited control ability; there are also problems such as the complex structure and high cost of the overall water injection control device, resulting in the current low level of reservoir water injection development and high oil production costs

(2) After a certain amount of oily sewage is injected into the water injection well, the suspended matter, oil, and impurities contained in the oily sewage will deposit and form mud cakes in the water-absorbing layer near the casing, causing blockage; resulting in a reduction or loss of injected water ; At present, the automatic operation of the backwashing equipment for unclogging the clogged parts is low and the structure is complex

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