Increasing the pressure of local water injection in the stratum at deposit sites with low-permeability or far from cluster pumping stations

UDK: 622.276.43

DOI: 10.24887/0028-2448-2017-3-64-65

Key words: injection pressure increase, maintenance of reservoir pressure, bores-pits

Authors: I.M. Gallyamov, A.F. Chernov (Oil and Gas Production Department Komsomolskneft, RF, Surgut)

At present Oil and Gas Production Department Komsomolskneft of Surgutneftegaz OAO has a stock of injection wells, mainly located at far from the cluster pumping stations sites, intake capacity of which could not be increased by existing methods. One way to increase the intake capacity of such wells is to increase the pressure of the working agent injection into the stratum. However, the injection pressure increase from the cluster pumping stations throughout the whole system of high-pressure water conduits leads to a number of negative consequences. Owing to the low efficiency of the centralized system for maintaining reservoir pressure due to the considerable distance of the cluster sites from the cluster pumping stations, the pits are widely used in Komsomolskneft. At pit using the injected liquid is fed from a high-pressure water conduit to the annular space of the pit, at first it goes to the pump intake, then under increased pressure - to the input of the water distributing unit.

740 injection wells with a low intake capacity were covered by increased injection pressure in Komsomolskneft on 01.10.16. Cumulative additional oil production amounted to 1161.3 thousand tons.

The use of pits makes it possible to reduce the specific costs of electricity for pumping water into the stratum, investing capital in the construction of high-pressure water conduits, improve their reliability and environmental safety, and ensure compliance with the design parameters of field development. The disadvantage of this technology is the lack of mobility, large costs for implementation.

The proposed scheme is not the only way to increase the injection pressure used in the enterprise. The choice of this or that way of increasing the injection pressure depends on many factors and is determined by the calculation of the economic efficiency of the measures implementation.

References

1. Shchurov V.I., Tekhnika i tekhnologiya dobychi nefti (Technique and technology

of oil production), Moscow: Nedra Publ., 1983, 510 p.

2. Spravochnik po neftepromyslovomu oborudovaniyu (Handbook of oilfield

equipment): edited by Bukhalenko E.I., Moscow: Nedra Publ., 1983, 399 р.