Oil field water injection automatic control system and method thereof

Abstract

The invention discloses an oil field water injection automatic control system and a method thereof. The oil field water injection automatic control system comprises an oil field water injection automatic control device, a frequency converter, motors, water injection pumps and a pressure sensor, and is characterized in that the motors comprise a permanent magnet synchronous motor and two asynchronous motors, and the permanent magnet synchronous motor and the two asynchronous motors are connected with the corresponding water injection pumps respectively; and the oil field water injection automatic control device acquires pipeline pressure signals through the pressure sensor, and carries out calculation on the pipeline pressure signals, thereby controlling switching and speed regulating operations of the permanent magnet synchronous motor and the asynchronous motors, and realizing smooth and steady water pressure of oil field water injection. The system and the method disclosed by the invention can effectively solve a technical problem that an existing oil field water injection control system cannot track variations of production parameters timely, which not only causes serious throttling waste, but also results in production accidents because of inappropriate regulation of operating parameters. The oil field water injection automatic control system is good in real-time performance of water injection amount regulation and high in system reliability and safety, reduces noises, saves energy, reduces emission, and improves the work efficiency.

Description

technical field [0001] The invention relates to automatic control technology, in particular to an automatic constant pressure control device and method for energy-saving oilfield water injection. Background technique [0002] Oilfield water injection is an important measure for many domestic oilfields to maintain high and stable production. The method is to concentrate the oil scattered in the formation into the oil well and then extract it. Since many oilfields belong to fractured block oilfields, the water injection range of each block is small, and the water injection volume needs to be adjusted frequently according to changes in production conditions. When extracting oil in an oil field, it is necessary to continuously inject water from the outside to the oil production layer in order to accumulate oil and improve oil recovery efficiency. Therefore, it is necessary to build a water injection pump station. A water injection pump station constitutes an independent water s...

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Problems solved by technology

[0004] In view of this, the object of the present invention is to provide an automatic oilfield water injection control system and its method, which can effectively solve the problem that the existing oilfield water injection control system cannot track changes in production parameters in time, which not only causes serious throttling and waste, but also causes serious waste. Technical problems of production accidents caused by improper adjustment of operating parameters

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