Oilfield water injection device

Abstract

The invention provides an oilfield water injection device. The device comprises a dosing pot, a dosing pump, and a water injection pump. The dosing pot comprises a dosing inlet and an outlet. The outlet of the dosing pot is communicated with the inlet of the dosing pump. The dosing pump is a diaphragm metering pump. The inlet of the water injection pump is communicated with the water outlet pipe of a water injection station. The outlet of the water injection pump is connected with a first outlet of the dosing pump and is communicated with the water injection pipe of a water injection well. The dosing pump also comprises a second outlet. The second outlet is communicated with the inlet of the dosing pot through a reflux pipeline. The oilfield water injection device can improve water injection pressure to achieve an objective of water injection well stimulation, and realizes to fill medicament on line to dredge reservoir blocking, and improves water absorption capacity of a water injection well. Correspondingly, after a stratum is dredged, water injection pressure is reduced, so just short-term high-pressure water injection is needed, and damages of a water injection pipeline and a stratum caused by long-term high-pressure water injection.

Description

technical field [0001] The invention relates to an oil field water injection technology, in particular to an oil field water injection device. Background technique [0002] In the process of oil field development, as the production time increases, the energy of the oil layer itself will be continuously consumed, and the pressure of the oil layer will continue to drop, causing a large amount of degassing of underground crude oil, increasing the viscosity, greatly reducing the production of oil wells, and even stopping spraying and production. Cause underground residual a large amount of dead oil to be unable to recover. In order to make up for the underground deficit caused by the extraction of crude oil, maintain or increase the pressure of the reservoir, achieve high and stable oil production, and obtain a high recovery rate, it is necessary to inject water into the oil field. [0003] In the process of oilfield water injection development, due to the incompatibility of fo...

AI Technical Summary

Problems solved by technology

However, no matter what kind of pressure raising equipment is used, long-term high-pressure water injection may cause the water injection pipeline to rupture, and high-pressure water rushing out will cause damage to the surrounding staff and equipment, and there is a certain safety risk. As the water injection pressure continues to rise, it may eventually lead to formation fracturing, which in turn leads to water breakthrough in oil wells

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