The working principle characteristics and water injection methods of oilfield water injection pumps

1. What is an oilfield water injection pump?

The so-called oilfield water injection pump refers to the water pump that injects water into the oil wells of the oilfield, which is called the oilfield water injection pump.

2. What is the purpose of oilfield water injection pumps?

The injection of water into oil wells in oil fields is a key link in oilfield production. In some oil wells with insufficient liquid supply, it is necessary to use a water injection pump to first inject a certain amount of water into the well, dilute the oil, and raise the oil level to a certain height in order to facilitate oil extraction.

3. Working principle of oilfield water injection pump

After the oilfield is put into development, as the extraction time increases, the energy of the oil layer itself will continue to be consumed, resulting in a continuous decrease in the pressure of the oil layer, a large amount of degassing of underground crude oil, an increase in viscosity, a significant reduction in oil well production, and even the cessation of injection and production, resulting in a large amount of residual dead oil underground that cannot be extracted. In order to compensate for the underground deficit caused by crude oil extraction, maintain or increase reservoir pressure, achieve high and stable oil production in the oilfield, and achieve high recovery rates, water injection is carried out in the oilfield.

The working principle of oilfield water injection pumps is to use the ultra-high pressure generated during the operation of oilfield water injection pumps to inject water into the oil layer through injection wells, in order to supplement and maintain the pressure of the oil layer, which is called water injection. The selection of water injection pump type should be based on the specific situation of the oilfield, the structural form of the reservoir, the size of the area, and the comprehensive technical and economic benefits. The treated water is pressurized by the water injection pump and then distributed to various injection wells through the water distribution room. The flow rate of injected water is measured in the water distribution room.

4. Characteristics of oilfield water injection pumps:

Suitable for oilfield and mine water injection, ultra-high pressure pump.

● Transmission type: including electric motor, diesel engine, gearbox transmission, and pulley transmission.

High pressure pumps are equipped with safety pressure regulating valves, and the pump pressure can be adjusted arbitrarily.

Electromagnetic speed regulation, frequency conversion speed regulation, and changing the plunger diameter can be used to adjust the flow rate to meet the selection needs.

The pump body materials include alloy steel, martensite, austenitic stainless steel, 316, 316L duplex steel, etc.

5. The injection method of oilfield water pumps:

The injection method of oilfield water pumps is the injection production system, which refers to the location of the injection well in the reservoir and the arrangement relationship between the injection well and the production well. The following injection methods can be selected based on the characteristics of the oilfield:

1) Cutting and water injection method.

2) Edge water injection methods are divided into three types: edge water injection outside the edge, edge water injection above the edge, and edge water injection inside the edge.

3) The area injection method can be divided into five types: five point injection, seven point injection, crooked seven point injection, four point injection, and nine point injection.