Geological simulation and issues of petroleum fields development
Section editor – PhD in geology and mineralogy Prischepa O.M.
Article # 23_2020 submitted on 05/19/2020 displayed on website on 07/03/2020
13 p.
pdf The ambiguity of correlation as a factor in stochastic modeling of oil and gas fields
In stochastic modeling of oil and gas accumulations, the main sources of uncertainty are associated with the incompleteness of structural information caused by data interpolation errors and inaccuracies in seismic velocity model. Often, porosity, permeability, and the position of phase contacts in reservoirs are represented by random variables with specified types and distribution parameters. There is another type of uncertainty caused by the ambiguity of the cross-well stratigraphic correlation and it has not been studied enough to date, mainly due to the complexity of generating multivariate equivalent correlation models. Based on the technology of automatic correlation of well sections according to their logging data, multivariate modeling of the Botuoba level of the Chayanda field was performed. Empirical distributions of level thicknesses and the position of its boundaries were obtained for the first time. The proposed solution allows to take into account the correlation variability in the stochastic estimation of oil and gas accumulations.

Keywords: stochastic modeling, correlation uncertainty, automatic well correlation, logging, Botuoba level, Chayandа field.
article citation Lapkovskiy V.V. Neodnoznachnost' korrelyatsii kak faktor pri stokhasticheskom modelirovanii zalezhey nefti i gaza [The ambiguity of correlation as a factor in stochastic modeling of oil and gas fields]. Neftegazovaya Geologiya. Teoriya I Praktika, 2020, vol. 15, no. 3, available at: http://www.ngtp.ru/rub/2020/23_2020.html
DOI https://doi.org/10.17353/2070-5379/23_2020
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