Research and application of boosting and increasing injection technology at wellhead of water injection wells
In response to the high oil pressure of a single well and difficulty in water injection in the third oil production plant of North China Oilfield,an intelligent wellhead boosting water injection system was formed by optimizing common boosting pumps and boosting methods,and utilizing IoT cloud technology.The selected reciprocating pump utilizes pistons for alternating suction and discharge,driven by a crank connecting rod mechanism,with a high effective pressure head,which can meet the high-pressure injection requirements of water injection wells.It is suitable for transporting small flow rates,high pressure,and high viscosity liquids.In wellhead pressurization,a single pump is injected into a single well with easy matching of technical parameters and close working conditions.It has strong adaptability to increasing the starting pressure of the injection well and is easy to achieve the best energy utilization state.It also reduces energy loss between the injection pump and the injection well,avoiding large-scale pressure boosting transformation of the injection pipeline network.This method is suitable for edge scattered wells with good injection and production effects as well as the high cost of replacing regional system pipelines.Local pressurization is a secondary pressurization based on the water injection pressure between metering stations or valve groups.The pressurization range is based on the highest oil pressure well and is suitable for areas with strong pipeline pressure,relatively independent water injection difficulties and a large number of blocks.In response to the high reliability requirements and management difficulties of booster pumps,an intelligent wellhead booster water injection system was designed.With IoT cloud technology,booster injection,safety protection,data collection,automatic control,remote monitoring,etc.are integrated to achieve unmanned operation.
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