Variable frequency speed regulation method of oilfield water injection system

A variable frequency speed regulation and oilfield water injection technology, which is applied in the fields of earthwork drilling, fluid production, wellbore/well components, etc. It can solve the problem that the efficiency of the oilfield water injection system does not meet the standard requirements, and can prolong the pump inspection period and avoid shocks. , the effect of saving maintenance funds

Inactive Publication Date: 2013-05-08
张洲
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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

Method used

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  • Variable frequency speed regulation method of oilfield water injection system

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Embodiment

[0024] The frequency conversion speed regulation method of the oilfield water injection system related to the present invention comprises the following steps:

[0025] (a) First, start the water injection pump, and detect its water pressure in real time, and send it to the central control processor;

[0026] (b) The central control processor analyzes and processes the pressure signal of the pressure sensor according to a pre-programmed program, and then outputs the signal to control the output current frequency of the frequency converter;

[0027] (c) The frequency conversion speed regulator changes the rotation speed of the AC motor, thereby changing the displacement of the water injection pump and achieving the purpose of stabilizing the system pressure.

[0028] In the step (a), the water pressure is detected in real time through a pressure sensor connected to the water injection pump.

[0029] In the step (c), the frequency converter changes the rotational speed of the AC...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/20
Inventor 张洲
Owner 张洲
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