TY - JOUR

T1 - A generalized image and boundaries of the Bazhenov Formation

T2 - constraints from well log data for Salym-type sections (West Siberia)

AU - Lapkovsky, V. V.

AU - Kontorovich, V. A.

AU - Shmelev, N. E.

PY - 2018/9/1

Y1 - 2018/9/1

N2 - 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. (C) 2018, V.S. Sobolev IGM, Siberian Branch of the RAS. Published by Elsevier B.V. All rights reserved.

AB - 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. (C) 2018, V.S. Sobolev IGM, Siberian Branch of the RAS. Published by Elsevier B.V. All rights reserved.

KW - Bazhenov Formation

KW - Salym area

KW - Zhekovsky plot

KW - automated well correlation

KW - Galton's composite portraiture

KW - generalized image

KW - average well

UR - http://www.scopus.com/inward/record.url?scp=85053207804&partnerID=8YFLogxK

U2 - 10.1016/j.rgg.2018.08.007

DO - 10.1016/j.rgg.2018.08.007

M3 - Article

VL - 59

SP - 1129

EP - 1136

JO - Russian Geology and Geophysics

JF - Russian Geology and Geophysics

SN - 1068-7971

IS - 9

ER -