Scholarly record
RESULTS OF SURFACE GEOCHEMICHAL SURVEY IN THE AREA OF MOLODYCZ GAS DEPOSIT IN THE CARPATHIAN FOREDEEP (SE POLAND)
Abstract
Surface geochemical method is an important technique in petroleum exploration. The purpose of this method is to record and analyze the distribution of micro-concentration of gaseous hydrocarbons, which migrate from subsurface accumulations to the near-surface zone. The paper presents the results of surface geochemical survey carried out in the area of the Mo?odycz gas deposit of the Carpathian Foredeep. A soil-gas geochemical survey was carried out along the six sampling lines corresponding to the seismic section. A total of 192 soil gas samples were collected from 1.2 m depth below the surface and then analyzed chromatographically. The maximum concentration of CH4, total alkanes C2-C4, total alkenes C2-C4 reached: 369.1 ppm, 3.5 ppm and 4.6 ppm, respectively. Based on the concentrations measured in the soil gas the C2H6/C3H8 (C2/C3) ratio was calculated, which allowed to evaluate the character of deep hydrocarbon accumulations. The statistical parameters, histogram distribution and scatter-plots of ethane versus propane concentrations shown dominance signals characteristic for gas-condensate accumulations. Moreover, normalized and filtered values of the total alkanes C2-C4 concentrations were drawn against structural map of the gas horizon of the Miocene strata. Anomalous concentrations of total alkanes C2-C5 were found in 11 zones. These zones were the effect of the migration from sources located at various depths. Such a comparison demonstrated also that hydrocarbon accumulations can be expected outside the known contours of the gas deposit. Results of surface geochemical survey combined with the geological studies and geophysical surveys provide a valuable source of comprehensive information about the explored area and can be a new perspective for exploration in a hydrocarbon provinces.
Publication Impact Profile
Publication details
References15
Klusman R.W., Soil Gas and Related Methods for Natural Resource Exploration, John Wiley & Sons, New York, pp 1-483, 1993.
Sechman H., Dzieniewicz M., Liszka B., Soil gas composition above gas deposits and perspective structures of the Carpathian Foredeep, SE Polnad, Applied Geochemistry, 99 197-210, 2012.
Górecki W., Dzieniewicz M., Sechman H., Report from surface geochemical survey and comprehensive, geological and geophysical data analysis in the Mirocin-Jarosław area, Archive of the Dept. of Fossil Fuels, AGH-UST, unpublished report, 1998.
Myśliwiec M., The Miocene reservoir rocks of the Carpathian Foredeep, Przegląd Geologiczny, pp 581-592, 2004.
Myśliwiec M., Exploration for gas accumulations in the Miocene deposits of the Carpathian using Direct Hydrocarbon Indicators (southern Poland), Przegląd Geologiczny, pp 299-306, 2004.
Myśliwiec M., Plezia B., Świętnicka G., The Miocene gas Fields dicovered in the NE part of the Carpathian Foredeep on the base of the Direct Hydrocarbon Indicators on the seismic data, Przegląd Geologiczny, pp 395-402, 2004.
Dzieniewicz M., Sechman H., Design of a Driving Rod for Soil Studies, Utility Model No. 58584, WUP, 05/2001. [in Polish]
Dzieniewicz M., Sechman H., Tool Kit for Manual Gas Sampling of Near-surface Soil Horizons. Patent No. PL 184080 B1, WUP, 08/2002. [in Polish]
Sechman H., Detailed compositional analysis of hydrocarbons in soil gases above multi-horizon petroleum deposits – a case study from western Poland, Applied Geochemistry, vol. 27/issue 10, pp 2130-2147, 2012.
Klusman R.W., Soil Gas and Related Methods for Natural Resource Exploration, John Wiley & Sons, New York, pp 1-483, 1993.
Klusman R.W., Detailed compositional analysis of gas seepage at the National Carbon Storage Test Site, Applied Geochemistry, pp 1498-1521, 2006.
Jones V.T., Matthews M.D., Richers D.M., Light hydrocarbons for petroleum and gas prospecting, Handbook of Exploration Geochemistry, pp 133-212, 2000.
Nikanov V.F., Distribution of methane homologs in gas and oil fields, Akademija Nauk SSSR Doklady, vol. 206, pp 234-246, 1971. [in Russian]
Plech M., Results of the surface geochemical survey conducted in the Mołodycz area (Carpathian Foredeep) in the light of the latest geological and seismic research. Master thesis, arch WGGiOŚ, AGH, 2010.
Kotarba M.J., Origin of natural gases in the autochthonous Miocene strata of the Polish Carpathian Foredeep, Annales Societatis Geologorum Poloniae, pp 409-424, 2011.
View or Download full articleAccess options
SWS access login
Login as SWS Scientific CommitteeLogin as SWS Scientific PartnerLogin as SWS AuthorAuthors and approved SWS contributors will read and export their own linked papers after identity matching by SWS profile, email and SGEM GlobalID.
For librarian assistance: [email protected]
Purchase Instant Access
- Article can be downloaded after successful payment.
- Article may be used according to SWS library access terms.
- Article cannot be redistributed.
