Semenov P.B.

Graduated from St. Petersburg State University (2001), specialization "biology".
PhD in of Biological Sciences.
Senior Researcher, VNIIOkeangeologiya named after I.S. Gramberg ".
Area of scientific interest: gas geochemistry, organic geochemistry, biogeochemistry.
Author of 14 publications.
Geochemical research
Section editor – PhD in geology and mineralogy Bazhenova T.K.
Article # 40_2018 submitted on 09/19/2018 displayed on website on 11/12/2018
25 p.
pdf Hydrocarbon molecular markers in bottom sediments of focused fluid discharge zones of Lake Baikal
The detailed research of the dispersed organic matter of Lake Baikal bottom sediments including analysis of hydrocarbon molecular markers – n-alkanes, isoprenoids, terpanes and polycyclic aromatic hydrocarbons has been carried out. The distribution of homologues of n-alkanes and their ratios in bottom sediments of the Posol bank-2, where mud breccias, gas-hydrates (bottom stations St1GT3, St1GT8) and authigenic carbonates (St1GT3) were detected, has shown an input of the highly transformed organic matter to the surface sediments likely due to the erosion and redeposition of sediments of the last glacial maximum extension age. Molecular composition of dispersed organic matter of the Ostrov site sediments (St3GC4) attested to the normal type of deposition not influenced by migration processes. Increased values of С12-С21 n-alkanes with an even maximum at С16 have been detected in sediments of station St18GC6 collected near the thermogenic methane seep (Kedr mud volcano), and together with the presence of the low transformed hopane structures (hop-17(21)-enes and hop-13(18)-enes) can testify to the methanotrophic and concomitant chemoorganotrophic microorganisms development in sediments.

Keywords: dispersed organic matter, bottom sediments, hydrocarbon molecular markers, gas-hydrates, methane, focused fluid discharge, mud volcano, Lake Baikal.
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Geochemical research
Section editor – PhD in geology and mineralogy Bazhenova T.K.
Article # 54_2012 submitted on 08/06/2012 displayed on website on 11/12/2012
13 p.
pdf  Distribution of gaseous hydrocarbons in bottom sediment and near-bottom water samples of offshore Southern Vietnam shelf zone
Among the direct methods of offshore oil and gas exploration the surface gas-geochemistry survey represent an especial interest. Relatively low cost, rapidity and possibility of all types deposits detection are laid in the basis of the gas-geochemistry survey relevance.
The halo concentration anomalies of gaseous hydrocarbons have been detected in bottom sediment and near-bottom water samples on the basis of areal gas-geochemistry survey carried out in offshore Southern Vietnam shelf zone, promising for petroleum resources. These anomalies probably outline the seeping of hydrocarbon deposits in the sediment column.
In the course of complex interpretation of geochemical and geophysical data the presence of high concentration of gaseous hydrocarbons in the areas of anomalies in the temporal seismic sections, which indicate zones of gas-saturated fluids discharge, was revealed.

Key words: gas geochemistry, gaseous hydrocarbons, bottom sediments, oil and gas potential, shelf, Southern Vietnam.
article citation Ilatovskaya P.V., Semenov P.B, Rys’kova E.О., Portnov А.D., Serov P.I. Raspredelenie gazoobraznykh uglevodorodov v donnykh otlozheniyakh i pridonno-pogranichnom sloe vodnoy tolshchi kontinental'nogo shel'fa yuzhnogo V'etnama [Distribution of gaseous hydrocarbons in bottom sediment and near-bottom water samples of offshore Southern Vietnam shelf zone]. Neftegazovaya Geologiya. Teoriya I Praktika, 2012, vol. 7, no. 4, available at:

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