Intelligent separate injection wellhead control device, system and method

Abstract

The invention relates to an intelligent separate injection wellhead control device, system and method. According to the device, an actuator is connected with a flow adjusting unit, an inlet of a valvebody is provided with a water inlet pressure sensor and an electromagnetic flowmeter, an outlet of the valve body is provided with a water outlet pressure sensor, the water inlet pressure sensor, theelectromagnetic flowmeter, the water outlet pressure sensor and the actuator are all connected with a control box platinum body, and the control device builds fluid wave codes and builds remote communication and control with an underground intelligent injection allocator. The wellhead control device for water injection well pressure wave code transmission is connected with a water injection wellwater injection pipeline, and when the control box platinum body receives an instruction of a remote server, the actuator acts to control a valve rod to increase or decrease the flow, so that wellborepressure of a water injection well is changed, the wave codes of pressure flow change are established, the control instruction is converted into the fluid wave codes, the water codes are transmittedto the underground intelligent injection allocator, the underground intelligent injection allocator receives an instruction and changes an opening degree of a water nozzle, the injection allocation requirement is met, and real-time monitoring and automatic control of the water injection well are achieved.

Description

technical field [0001] The invention belongs to the technical field of oilfield water injection, and in particular relates to an intelligent split injection wellhead control device, system and method. Background technique [0002] At present, the commonly used mechanical layered water injection technology mainly includes bridge-type eccentric injection and bridge-type concentric injection. Both layered water injection technologies use high-efficiency cable measurement and adjustment technology. The key technology is to use cables to connect measurement and adjustment instruments into the well. Realize testing while tuning. There are many human factors in the measurement and adjustment process, and the layered flow cannot be monitored for a long time. At the same time, the measurement and adjustment process of this technology requires mechanical docking, which is difficult for personnel to operate, and the risk of downhole operation is high, which seriously restricts the effe...

AI Technical Summary

Problems solved by technology

[0004] 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 technology cannot better adapt to the development needs of fine layered water flooding, and cannot realize long-term continuous monitoring of layered parameters, resulting in insufficient basis for the preparation of separate injection schemes, and cannot meet the requirements of fine water distribution; point-shaped discontinuous measurement and adjustment are used , unable to keep the qualified rate of water injection at a high level for a long time

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