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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...

Estimation of the Remaining Oil Saturation (ROS, the fraction of pore volume occupied by oil at a given location and time) in a reservoir is one of the key processes in oil field monitoring and exploitation. Because of the various geological, structural, and chemical heterogeneities that exist within the formations composing an oil field, the evolution of ROS as the reservoir gets drained will be heterogeneous as well. Such discrepancies can occur at different scales, from the microscopic (pore size) to the macros...

The paper investigates the problem of determining the interinfluence of production and injection wells on a single development target. To solve this problem, we develop a stochastic reservoir model, which is a variant of extended Kalman filter. The model is some simplification of the hydrodynamic model. Its purpose is to estimate interwell permeability through production history. We discuss different variants of the model, which vary basing on availability of certain input data. On the baseline, the model can only...