Analysis of the effectiveness of the current field development system in case of non-stationary water-flooding termination and transition to hot water injection
UDC: 622.276.652
DOI: 10.33285/0207-2351-2022-10(646)-43-47
Authors:
ALMUKHAMETOVA ELVIRA M.1,
GILYAZETDINOV RUSLAN A.1
1 Institute of Oil and Gas, Ufa State Petroleum Technological University (branch in the City of Oktyabrsky), Oktyabrsky, Republic of Bashkortostan, Russia
Keywords: development system, hot water injection, thermal impact, water-flooding, oil flow rates
Annotation:
The development of a high-viscous oil field experiences a unique situation when the technologies of non-stationary water-flooding and thermal treatment were tested one by one. Since the stationary water injection was used before the transition to thermal stimulation, it became possible to investigate the development system reaction to the termination of cyclic water injection and the beginning of thermal stimulation. The article shows that the presence of a positive effect from the hot water injection in the considered sites of the field remains unproven. On the other hand, the cessation of non-stationary impact and the transition to stationary water injection are always accompanied by an increase in water cut. However, if, as a result of withdrawals increase by water injection compensation, the formation pressure in the reservoir increases, then a subsequent decrease of water-flooding and an increase of oil production are observed. It becomes obvious that in conditions of high-viscous oil deposits development, the priority trend is to create high pressure gradients. Based on the actual data, the technological efficiency of the transition from cyclic injection to stationary water-flooding and then to thermal treatment has been proved.
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