Intelligent separate injection floating threshold control layered flow allocation method

Abstract

The invention discloses an intelligent separate injection floating threshold control layered flow allocation method, which is used for ensuring that a water distributor in a shaft is kept opened in afloating threshold control mode. During testing and adjusting, according to the designed injection allocation quantity of each layer, the water distributor of the highest injection layer is kept in the open state, injection allocation is started from the lowest injection allocation layer, and testing and adjusting are conducted according to the flow of a ground flow meter by adopting the additionprinciple. On the basis of fluid wave code communication digital intelligent dispensing, sending and operation of a ground-to-underground allocation instruction are achieved on the ground in a wave code communication mode through control software. Operation is simple, precision is high, the problem that the underground flow cannot be calibrated underground is solved, the procedure that a conventional separate injection process requires that a test vehicle carries out cable or steel wire casting and fishing test and allocation is omitted, long-term accurate metering of underground flow is guaranteed, underground flow calibration and allocation operation can be carried out without moving a pipe column, the operation risk and cost are reduced, and flow calibration can be carried out in a layered mode.

Description

technical field [0001] The invention belongs to the technical field of oilfield water injection, and in particular relates to an intelligent distribution injection floating threshold control stratified flow allocation method. Background technique [0002] At present, steel wire operation and cable operation are mainly used for test deployment of layered water injection wells in oilfields. The steel wire operation controls the lifting and lowering of the steel wire through the control platform of the ground well testing vehicle, and repeatedly pulls and fishes to replace the floating nozzle. The cable operation controls the lifting and lowering of the cable through the control platform of the ground well testing vehicle, and uses the downhole measuring and adjusting instrument to rotate the motor to adjust the opening of the water nozzle. Realize the function of adjusting while measuring. [0003] With the deepening of oilfield development, the number of separate injection w...

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Problems solved by technology

[0003] With the deepening of oilfield development, the number of separate injection wells has increased year by year, the workload of measurement and adjustment is heavy, and the cost of supporting measurement and adjustment has increased year by year; the frequent occurrence of obstructions in measurement and adjustment has resulted in high costs for later detection of strings and pressure operations; pressure fluctuations, formation Influenced by factors such as changes in water absorption capacity, the inspection and matching qualification rate dropped rapidly, and it was difficult to meet the needs of fine layered water injection in the oilfield; at the same time, in order to further improve the digital level of water injection and explore new ways of layered water injection, the wave code communication digital intelligent separation technology research was carried out and test

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