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The presented work highlights the general geochemical aspects and considers the theoretical basis of the method of geochemical monitoring of oil fields using the indicator of the quantitative ratio of organic compounds and their isomers - isobutane/butane. The object of the study are the microorganisms that can affect gas composition. The purpose of the work is to study the effect of microorganisms on the biodegradation of oil. The peculiarity of the oil composition will be used to search, delineate bypassed oil a...

The determination of residual oil reserves is a complex task that involves high qualified specialists and resource-intensive calculations. Classical oil reservoir simulation methods cannot provide proper level of reliability due to increasing of complexity caused by oil reservoir depleting. Stagnant oil zones arising from heterogeneity of shear modulus of medium cannot be determinate by oil reservoir simulation due to use of effective values of porosity and absolute and phase permeability. The problem of determina...