Shunting injection allocation method and shunting injection allocation machine

A dispenser and dispensing technology, which is used in the production of fluids, earth-moving drilling, wellbore/well components, etc., can solve problems such as reduction and large molecular weight of polymers, and achieve enhanced oil recovery, small shearing action, The effect of reduced losses
CN101270648BActive Publication Date: 2011-10-05CHINA NAT OFFSHORE OIL CORP +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA NAT OFFSHORE OIL CORP
Publication Date
2011-10-05

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Abstract

The invention relates to a split-flow injection allocation method and a split-flow distributor. The method of the invention is characterized in that every subsection of a polymer injection pipe is provided with at least one distributor, and a split-flow barrier is arranged in the distributor to divide polymeric liquid entering into the distributor into two parts, one part of which flows up to an upper oil reservoir and the other part of which continues to flow down to the lower oil reservoir. The polymer injection pipe is provided with the split-flow distributor and the surface of the split-flow distributor is sleekly connected with the outlet of the distributor. So liquid passing by the distributor has little partial drop pressure loss, low friction resistance and little shearing action,thus effectively reducing the loss of the viscosity of injected polymer. The split-flow injection allocation method and the split-flow distributor can be widely used for improving the recovery ratio of reservoir oil displacement in an offshore oilfield.
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Description

technical field

[0001] The invention relates to a flow diversion method and device, in particular to a flow diversion distributing method and a diversion distributor used for polymer flooding in offshore oil field exploitation. Background technique

[0002] In order to improve the recovery efficiency of existing oilfields in offshore oilfields, the method of injecting polymer flooding is usually used to solve the problem, so as to achieve the purpose of improving recovery and increasing oilfield production. Polymer flooding technology is to inject chemical polymers into oil layers, dilute the viscosity of crude oil through the chemical effect of polymers, decompose water, and squeeze or absorb crude oil stored in complex oil layers that is difficult to recover, so as to facilitate centralized recovery by oil recovery machines. In the work of enhancing oil recovery by polymer injection (abbreviation of polymer flooding) in offshore oilfields, due to the high molecular weight ...

Claims

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