Method for setting reasonable partial pressure points in partial pressure reconstruction of water injection station

Abstract

The invention relates to a method for setting reasonable partial pressure points in the partial pressure reconstruction of a water injection station. The method comprises the following steps: assuming that the water injection station can conduct partial pressure water injection at arbitrary pressure points, and setting 21 assumptive partial pressure points at intervals of 0.5 MPa within the water injection pressure range of 3-13.5 MPa; calculating the minimum useful work output by the water injection station of partial pressure water injection schemes of the assumptive partial pressure points; calculating the machine set efficiency in the water injection station of the assumptive partial pressure water injection schemes; calculating the energy consumption of the water injection station of the partial pressure water injection schemes of the assumptive partial pressure points; comparing to preferably select the minimum energy consumption schemes, and obtaining a plurality of minimum energy consumption partial pressure water injection schemes through energy consumption comparison of the water injection station of the partial pressure water injection schemes of the assumptive partial pressure points; investing the optimal scheme preferably selected, designing the adjustment reconstruction construction scheme and the off-station pipe network adjustment construction scheme of the water injection pump machine set in the water injection station of the minimum energy consumption partial pressure water injection schemes, and comparing the investment amounts of the schemes to select the partial pressure water injection scheme of the water injection station with minimum investment and minimum energy consumption.

Description

technical field [0001] The invention relates to a method for establishing a reasonable partial pressure point for partial pressure transformation of a water injection station, finds out a scientific approach and a theoretical template for selecting a partial pressure point with the lowest energy consumption for partial pressure transformation of a water injection station, and provides partial pressure energy-saving technical transformation for a high-pressure centrifugal pump water injection station Provide a fast, effective and reasonable way. Background technique [0002] At present, the oilfield sewage reinjection mode is basically: the production fluid is separated from oil, gas and water at the sewage station, and the sewage enters the water injection station through the low-pressure water diversion system. single well for reinjection. In the whole process, due to the large difference in the formation permeability of each single well, the demand for incoming water pres...

AI Technical Summary

Problems solved by technology

In the whole process, due to the large difference in the formation permeability of each single well, the demand for incoming water pressure is different, and the large difference can even reach more than 10MPa. However, the outlet pressure of the water injection pump station is a constant maximum demand value, which means As a result, there will be valve-controlled interception and energy loss during the operation of the entire system, which is an inevitable link

In some systems with large differences in water injection pressure, the loss of energy consumption is very serious, and the efficiency of the entire system is also far below the normal value

The selection of the core part of the pressure division point of the current high-pressure centrifugal pumping station pressure division transformation technology is established through trial calculations, and there is no solid theoretical basis and sufficient demonstration

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