AFES May Talk - Sergey Prosvirkin & Ruslan Gaifutdinov

Abstract:

Waterflooding is the most widely applied secondary recovery method in conventional oil reservoirs, typically providing an additional 20–40% of OOIP through pressure maintenance and improved sweep efficiency. Although maintaining an injection-to-production ratio (IPR) ≥ 1.0 supports reservoir pressure, field experience shows that injection balance alone does not ensure effective displacement or conformance.

Waterflood performance is often limited by reservoir heterogeneity, poor zonal isolation, and out-of-zone injection, leading to inefficient sweep, early water breakthrough, and reduced recovery. High-permeability streaks, fractures, and channeling pathways can accelerate breakthrough, while poor vertical and areal conformance results in bypassed oil and increased water handling costs, with potential long-term implications for field abandonment.

This session presents practical diagnostic and surveillance workflows to identify conformance issues, evaluate sweep efficiency, and optimize injection strategies. Through integrated, data-driven approaches, reservoir engineers can mitigate breakthrough risks, improve displacement efficiency, and enhance ultimate recovery in mature waterflooded reservoirs.

BIO: Sergey Prosvirkin is an accomplished petrophysicist with over 15 years of experience at TGT, including nine years in the Middle East. Throughout his career, he has developed extensive expertise in flow diagnostics, well integrity evaluation, noise logging, and advanced temperature analysis. Currently serving as a Principal Technical Domain Champion, Sergey is based in Aberdeen, where he continues to drive innovation and technical excellence in the field of well diagnostics.

Ruslan Gaifutdinov is a Domain Champion with 10+ years of experience in cased hole log interpretation, well integrity, PLT/ILT, and reservoir evaluation. He leads technical interpretation in Central Europe and has worked across CIS, MENA, Africa, Europe, and the North Sea regions.

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