Improvement of lithology and saturation determined from well logging using statistical methods

• Autorzy: Kaźmierczuk M. , Jarzyna J.
• Języki publikacji: EN

Abstrakty

EN

Results of selected statistical analyses applied to well-logging data in a typical borehole in the Miocene thin-bedded formation are presented. Primary geological data in the form of lithology core descriptions was included as a joining member between logs and lithology. Principal component analysis enabled data space to be reduced. It incorporated new variables, PC, in place of logs, preserving the same petrophysical information. Clustering, discrimination and classification were tools facilitating data arrangement and preliminary data grouping according to natural petrophysical features of analysed rocks. Processing of well-logging data alone with the use of statistical methods contributed to correct evaluation of the lithology and saturation for the thin-bedded Miocene deposits. Such an approach can be advantageous for the preliminary qualitative evaluation of productive horizons.

Słowa kluczowe

EN

well logging; statistical methods; Miocene deposits; Carpathian fore-deep

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2006
• Tom: Vol. 54, no. 4
• Strony: 378--398

Twórcy

autor

Kaźmierczuk M.

autor

Jarzyna J.

• Faculty of Geology Geophysics and Environmental Protection, Department of Geophysics AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland,

Bibliografia

• Baran, U., and E. Jawor, 1994, The conditions of the natural gas accumulation in the Miocene formations and the prospecting perspectives in the Tarnów-Pilzno area, Nafta-Gaz 4, 133-143 (in Polish).
• Bucheb, J.A., and H.B. Evans, 1994, Some applications of methods used in electrofacies identification, The Log Analyst, Jan.-Feb., 14-26.
• Ciechanowska, M., P. Budak, S. Falkowicz, S. Kowalska, A. Ossowski, M. Paszkowski, M. Stadtmüller and T. Zorski, 2001-2004, Report of aimed project of MSIT: No. 6T12 071 2001C/5636: "Integrated methodology of measurements and interpretation for well logging in thin-bedded Miocene formation in the Carpathian Foredeep", Archive of Oil and Gas Institute, Kraków (in Polish).
• Davis, J.C., 1973, Statistics and Data Analysis in Geology, John Wiley & Sons Inc, New York.
• Ingerman, V.G., 1995, Statistical integration of log data for lithology determination and formation evaluation, The Log Analyst 3, 38-48.
• Karnkowski, P., 1989, Deltaic sediments of the Carpathian Foredeep, Prz. Geol. 37, 28-32 (in Polish).
• Karnkowski, P., 1999, Oil and gas deposits in Poland, Geosynoptics Society GEOS, AGH-University Science and Technology, Kraków, 380.
• Kotula (Kaźmierczuk), M., D. Potter, H.L. An, P. Corbett and J. Jarzyna, 2006, Statistical analyses and neural networks for improved estimation of net sand to gross interval ratio in thin bedded sand-shale sequences using a representative training interval, Mathematical Geology (in press).
• Krzywiec, P., 1999, Miocene tectonic evolution of the eastern Carpathian Foredeep Basin (Przemyśl-Lubaczów) in light of seismic data interpretation, Publs. Pol. Geol. Inst., Analysis of the Forecarpathian Tertiary Basin 168, 249-276 (in Polish).
• Morrison, D.F., 1990, Multivariate Statistical Methods, Copyright for the Polish edition by PWN, Warszawa, 590 pp.
• Moryc, W., 1995, Terrestrial formations of Paleogene in the area of Carpathian Foredeep, Nafta-Gaz 5, 181-195 (in Polish).
• Myśliwiec, M., 2004a, Exploration for gas accumulations in the Miocene deposits of the Carpathian Foredeep using Direct Hydrocarbon Indicators (southern Poland), Prz. Geol. 52, 4, 299-306 (in Polish).
• Myśliwiec, M., 2004b, The Miocene reservoir rocks of the Carpathian Foredeep, Prz. Geol. 52, 7, 581-592 (in Polish).
• Myśliwiec, M., 2004c, Traps for gas accumulations and the resulting zonation of the gas fields in the Miocene strata of the eastern part of the Carpathian Foredeep (SE Poland), Prz. Geol. 52, 8/1, 657-664 (in Polish).
• Połtowicz, S., 1994, Middle-Miocene trough sediments and submarine erosion in Ropczyce area (the Dębica-Rzeszów region), Nafta-Gaz 9, 363-373 (in Polish).
• Roniewicz, P., and A. Wysocka, 1997, Examples of Miocene cyclic sedimentation - Roztocze, eastern Poland, Prz. Geol. 45, 8, 799-802.
• Stadtmüller, M., and M. Front, 2005, Dedicated interpretation works in J4 well, Report for Geosynoptics Society "Geos" AGH UST, Kraków (in Polish).
• Stupnicka, E., 1989, Geology of Poland, Wyd. Geol., Warszawa, 265-277 (in Polish).
• Ward, J.H., 1963, Hierarchical grouping to optimize an objective function, J. Amer. Statist. Assoc. 58, 236-244.
• Zorski, T., 2001, Deconvolution in well logging. In: Proc. AGH UST Conference: "Earth Sciences in Basal Research, Prospecting and Environmental Protection at the Beginning of XXI Century", Kraków, 28-29 June, 157-161 (in Polish).
• Zorski, T., and W. Twaróg, 2004, Method of the water saturation Sw determination for thinbedded shale-sandstone formations applied in SATUN programme of GEOwin system, Nafta-Gaz 9, 438-450 (in Polish).