Water injection well fluid carrier signal control method and device

Abstract

The invention discloses a water injection well fluid carrier signal control device and method. The water injection well fluid carrier signal control device comprises an oil field station control system, a carrier ground main control device, a synergistic pressure reduction device and a downhole intelligent flow regulator. The stratified dynamic data of the water injection well are remotely controlled and monitored through the oil field station control system, and a control command is sent to the carrier ground main control device; the carrier ground main control device synergistically acts with the synergistic pressure reduction device based on the received command to change the water injection well shaft pressure and build a fluid wave code; the carrier ground main control device transmits the fluid wave code to the downhole intelligent flow regulator, the downhole intelligent flow regulator receives the command, the wave code is recognized, and decoding is completed; whether the water injection well fluid flow meets requirements is judged; and if yes, a water nozzle is not adjusted, or otherwise, the opening of the water nozzle is changed to achieve flow regulation requirements,and real-time monitoring and automatic control on the water injection well are thus realized. Fine water distribution is realized, single layer rush is effectively controlled, invalid water circulation is reduced, the test team load is reduced, the reservoir development dynamic process is truly mastered, the final target of reservoir engineering integration is realized, and cost reduction and efficiency increasing are realized.

Description

technical field [0001] The invention belongs to the technical field of oil field water injection, and in particular relates to a method and device for controlling a fluid carrier signal of a water injection well. Background technique [0002] After more than 60 years of development, CNPC's layered water injection technology has formed three generations of layered water injection technology represented by fixed type, steel wire fishing, and cable measurement and adjustment, which has reached the international leading level. The recovery factor and other aspects played an important role. [0003] With the continuous deepening of fine oilfield development, water flooding development faces more complex injection-production relationship, unbalanced production of oil layers, and prominent contradictions between layers, resulting in serious ineffective water circulation, rapid rise of water cut, and low degree of reserve production. Existing separate injection technologies cannot ...

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Problems solved by technology

[0003] With the continuous deepening of fine oilfield development, water flooding development is faced with more complex injection-production relationship, unbalanced production of oil layers, and prominent contradictions between layers, resulting in serious invalid water circulation, rapid rise of water cut, and low degree of reserve production

Existing separate injection technologies cannot better meet the development needs of fine stratified water flooding:

[0004] ① The long-term continuous monitoring of layered parameters cannot be realized, resulting in insufficient basis for the preparation of dispensing schemes and the inability to meet the requirements of fine water distribution;

[0005] ②Using point-like discontinuous measurement and adjustment, it is impossible to keep the qualified rate of water injection at a high level for a long time;

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