Division of the Parfenovsky horizon reservoirs in the Kovykta field into lithotypes using the well survey data
https://doi.org/10.21285/2686-9993-2020-43-2-220-229
Abstract
The purpose of the work is to study the heterogeneity of the composition, structure, and filtration-capacity properties of the sandstones in the Parfenovsky horizon of the Chora formation, the Kovykta gas condensate field. An analysis of the behavior of the well geophysical survey curves and differential distributions of the geophysical parameters (double difference parameters of the gamma-ray logging and neutron logging) in the Parfenovsky horizon interval has been conducted. The differential distributions of the geophysical parameters before and after dividing the reservoirs of the Parfenovsky horizon into lithotypes have been compared. The analysis of the logging data and the geophysical parameters obtained based on the above has made it possible to identify three lithotypes of the sandstone reservoirs in the Parfenovsky horizon section. Based on the well survey data, quantitative criteria for dividing the sandstone reservoirs of the Parfenovsky horizon into lithotypes have been substantiated. Directions for the further studies of the structure of the reservoirs in the Parfenovsky horizon have been determined. The study has concluded that there are reservoirs with improved and degraded filtration-capacity properties in the Parfenovsky horizon. The presence of reservoirs with different properties and composition in the deposits of the Parfenovsky horizon shows that it is necessary to revise the petrophysical model and methodological support for the complex interpretation of the well geophysical survey data used in the recalculation of the hydrocarbon reserves of the Kovykta gas condensate field in 2013.
About the Authors
P. N. Kokarev
Branch “Gazprom nedra NTC”, LLC “Gazprom nedra”
Russian Federation
Russian Federation
Head, Center for Processing and Interpretation of Geophysical Studies of Wells and Hydrodynamic Studies
70 Gertsena St., Tyumen 625000, Russia
I. A. Dikih
Branch “Gazprom nedra NTC”, LLC “Gazprom nedra”
Russian Federation
Russian Federation
Deputy head, Petrophysics Department, Center for Processing and Interpretation of Geophysical Studies of Wells and Hydrodynamic Studies
70 Gertsena St., Tyumen 625000, Russia
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Review
For citations:
Kokarev P.N., Dikih I.A. Division of the Parfenovsky horizon reservoirs in the Kovykta field into lithotypes using the well survey data. Earth sciences and subsoil use. 2020;43(2):220-229. (In Russ.) https://doi.org/10.21285/2686-9993-2020-43-2-220-229
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