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Alpha and beta-activities of sedimentary rocks of the Runovshchyna area as an indicator of the conditions of their originNormal access

Authors: S. Vyzhva, O. Shabatura, V. Onyshchuk and I. Onyshchuk
Event name: 18th International Conference on Geoinformatics - Theoretical and Applied Aspects
Session: Geoinformation Researches for Petroleum Exploration
Publication date: 15 May 2019
DOI: 10.3997/2214-4609.201902093
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1.07Mb )
Price: € 20

Under petrophysical modeling, data of experimental determination of specific α- and β-activity and chemical composition of samples of Runovschyna area were used. Alpha-radiometry can be used to discriminate rocks of different lithology, and β-radiometry is more effective for age differentiation of formations. For reconstruction of the formation conditions should be applies such types: (1) Aα=1000-1500 (Bq/kg), Aβ=1800-2000 - type of rocks that undergone severe and deep weathering; (2) Aα=100-700, Aβ=200-1800 - type of mature sedimentary rocks, with a separate subtype with Aα=300-500, Aβ=600-800 that represented by sorted quartz sandstones; (3) Aα=300-1100, Aβ=600-1400 - type of argillite strata. Types 1 and 3 can be connected to the maternal layer of the kerogen, and type 2 is as a medium of migration and their accumulation. Overlapping the ranges of radiometric characteristics of different types of rock requires further analysis and improvement.

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