Variable frequency speed regulation method of oilfield water injection system

Abstract

The invention discloses a variable frequency speed regulation method of an oilfield water injection system. The method comprises the following steps of: (a) starting a water injection pump (1), detecting the water pressure of the water injection pump (1) in real time, and transmitting the water pressure to a central control processor (4); (b) analyzing and processing a pressure signal of a pressure sensor (2) by the central control processor (4)according to a pre-compiled program, and then outputting the signal to control the output current frequency of a variable frequency speed regulator (3); and (c) changing the rotating speed of an alternating current motor by the variable frequency speed regulator (3), so the flow of the water injection pump is changed, and the aim of stabilizing the pressure of the system is fulfilled. The variable frequency speed regulation method of the oilfield water injection system has the advantages that water injection under constant pressure, energy conservation and consumption reduction are realized; an automatic management level is improved; maintenance cost is greatly saved; a machine pump can be softly started under the on-load condition through a variable frequency speed regulation system; the impact of high current on a power grid and mechanical equipment is effectively restrained and avoided; a pump inspection period is prolonged; and pump inspection cost is greatly reduced.

Description

technical field [0001] The invention relates to a frequency conversion speed regulation method for an oil field water injection system. Background technique [0002] Water injection is a very important production method in oilfield development. It can effectively replenish formation energy and play an active role in improving oil recovery and ensuring high and stable production in oilfields. However, water injection itself is also a large energy consumer. The power consumption of the water injection system is huge, accounting for about 33% to 56% of my country's oilfield production electricity consumption. Moreover, the energy consumption of water injection will rise sharply with the rise of the comprehensive water content of the oil field. Therefore, the energy saving and consumption reduction of the water injection system is of great significance for reducing the production cost of the oil field. According to survey statistics, the average operating efficiency of water i...

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Problems solved by technology

However, as the difficulty of oilfield development increases, the efficiency of water injection systems in most oilfields does not meet the standard requirements

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