A generalized image and boundaries of the Bazhenov Formation: constraints from well log data for Salym-type sections (West Siberia)

A technique akin to Galton’s composite portraiture is suggested for creating a generalized image of a stratigraphic unit based on well log data from a group of well sections. The procedure begins with superimposing stratigraphically equivalent section points according to pairwise correlation models...

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Bibliographic Details
Published inRussian geology and geophysics Vol. 59; no. 9; pp. 1129 - 1136
Main Authors Lapkovsky, V.V., Kontorovich, V.A., Shmelev, N.E.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.09.2018
Allerton Press
Subjects
applied (geophysical surveys & methods)
Asia
automated well correlation
average well
Bazhenov Formation
Commonwealth of Independent States
Economic geology
energy sources
Galton’s composite portraiture
generalized image
Geophysics
Jurassic
Khanty-Mansi Russian Federation
Mar'yanovskaya Formation
Mesozoic
natural gas
oil and gas fields
petroleum
petroleum exploration
Russian Federation
Salym area
Salym Field
spatial distribution
Tyumen Russian Federation
well-logging
West Siberia
Zhekovsky plot
Salym area
average well
Bazhenov Formation
Galton’s composite portraiture
generalized image
Zhekovsky plot
automated well correlation
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Summary:A technique akin to Galton’s composite portraiture is suggested for creating a generalized image of a stratigraphic unit based on well log data from a group of well sections. The procedure begins with superimposing stratigraphically equivalent section points according to pairwise correlation models followed by weighted summation of similar logs. The superimposition highlights persistent common features of the sections, while their minor individual details become suppressed. A generalized model of the Bazhenov Formation in the Salym area has been constructed from gamma-ray, apparent resistivity, and self-potential logs. Radioactivity and resistivity anomalies, which are often used as constraints on the Bazhenov Formation boundaries, show a significant spatial discrepancy. According to the correlation, the formation volume in each well depends on the depth interval corresponding to the hypostratotype. The results were used to map the Bazhenov Formation thickness and its standard deviation, as well as average values of different logs.
ISSN:1068-7971
1878-030X
DOI:10.1016/j.rgg.2018.08.007