Formation and preservation of reservoirs at great depth

Abstract

The article comprises of the conditions for the formation of reservoirs that retain their properties at great depths, as well as the geological features that are necessary for their safety during subsidence. Since the factors that ensure preservation are very diverse, their digitization is quite difficult; rather, we should say on considering many factors, the combination of which, and not necessarily all at once, is sufficient to forecast the existence of hydrocarbon deposits (and therefore, first of all, reservoirs) at depths that have become technologically accessible, that is, to expand the range geological forecast, which is technologically achieved.

Theoretical and methodological approaches to identifying deep accumulations of oil and gas in oil and gas basins of the Russian Federation

“…Conditions for the formation of reservoirs (areas with improved FCS) at deep depths are an important issue along with the formation and preservation of hydrocarbons (Kosenkova et al, 2022;Kuandykov et al, 2022). A major generalization on the distribution of porosity and permeability at deep depths was made in Ehrenberg's work, in which an extensive database was statistically processed, including more than 35,000 values for terrigenous sections and 13,300 for carbonates (Ehrenberg and Nadeau, 2005).…”

“…Due to the significantly greater chemical activity of carbonate reservoirs, epigenetic processes during immersion pay great attention to them. It is noted that for FCS, the influence of reservoir temperatures (and paleotemperature) is much more important than the absolute values of the depths of occurrence (Kuandykov et al, 2022).…”