OPTIMIZATION OF OPERATION MODES OF THE PLUNGER PUMP OF THE FORMATION PRESSURE MAINTENANCE SYSTEM

Abstract

The efficiency of pumping equipment in the context of continuous growth in electricity prices is a priority for any oil and gas production department (OGPD). The pumping stations of the reservoir pressure maintenance system are the main consumers of electricity in the OGPD. The efficiency of pumping units, as a rule, is reduced primarily to the value of their efficiency, and the criterion for the efficiency of the injection system is usually the consumption of electrical energy per unit volume of pumped liquid. At the same time, they often focus only on maintaining high pump efficiency, which optimizes pump operation, but does not take into account the impact of collectors on electricity costs.Typically, the PPD pump station will inject service water into several directions. The purpose of the studies is to find optimal modes of pumping by pumps of a pump station in several directions, which ensure minimum electric power consumption for injection. The presented article presents the calculation of the cost of pumping by one plunger (volume) pump into two directions during laminar movement of liquid in the pipeline. Injection volumes for each area are specified. Three options are considered: separate injection in each direction (1), parallel injection in both directions simultaneously until the ordered volume is injected in one of the directions, after which this direction is blocked and injection in the other direction (2), and parallel injection in both directions simultaneously with «pressed» one direction, so that the injection of the ordered volumes is completed simultaneously (3).The performed calculations showed that the useful operation of the pump performed during simultaneous pumping of some volumes of liquid (modes 2 and 3) in two different directions of the same system is the same and significantly less compared to the operation of the pump performed to fill one of these directions during separate pumping (mode 1). The maximum effect is achieved with equal injection volumes in each direction and the same reservoirs. In this case, the useful operation of the pump for simultaneous injection (mode 2 and 3) is half as much as for separate injection (mode 1).