«Geology, geophysics and development of oil and gas fields»

Experience of oil extraction regulation from productive reservoirs of complex geological structure by non-stationary technologies application

UDC: 622.276
DOI: 10.33285/2413-5011-2022-6(366)-58-62

Authors:

¹ LLC NPO "Neftegaztekhnologiya", Ufa, Russia

Keywords: non-stationary water-flooding, heterogeneity, permeability, East Orenburg dome uplift, residual oil reserves

Annotation:

The article considers the main stages of the geological-technological substantiation of non-stationary flooding of productive formations of the Frasnian stage of the Upper Devonian stage of one of the oil fields in the East Orenburg dome uplift. It is noted that the object under study is characterized by a complex geological structure, high layered and zonal heterogeneity in reservoir properties and presence of clays of heterogeneous mineralogical composition. Based on the results of the detailed analysis of the geological structure and technological development indicators, it was revealed that the residual oil reserves are recovered unevenly and are concentrated in low-permeability interlayers. Improvement of the current development system efficiency, redistribution of the steady filtration flows in the reservoir and reduction of the of produced water volumes with subsequent involvement of non-drained oil reserves into the development require conducting non-stationary water-flooding, substantiated by the current development system.

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