Possibilities for Well Log Correlation using Standard Deviation Trends in Neogene-Quaternary Sediments, Sava Depression, Pannonian Basin
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Published:
Jun 28, 2017
Keywords:
standard deviation trends, marker horizon, correlation, Sava Depression, Pannonian Basin
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Abstract
The regular working method for well log correlation in the Neogene-Quaternary infill of the Croatian Pannonian Basin is based on visual identification of specific motifs that can be observed regionally through the sub-basins or depressions. This method is proven successful through exploration for petroleum accumulations in the aforementioned area but its application is limited outside of the interval of the Upper Miocene sediments and has proven to be subjective. Standard deviation values of well log data from conventional well logs (spontaneous potential, shallow and deep resistivity) were calculated and observed over the entire Neogene-Quaternary well interval for defining new correlation markers which correspond to the old well log marker horizons. Traditionally determined marker horizons did not coincide with those defined by the standard deviation technique. However, new regional horizons were established in the youngest part of the infill, which made more detailed correlation now possible.
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References
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BASSIOUNI, Z. (1994): Theory, Measurement, and Interpretation of Well Logs.– Society of Petroleum Engineers, Richardson, 372 p.
BENGTSON, C.A. (1981): Statistical Curvature Analysis Techniques for Structural Interpretation of Dipmeter Data.– AAPG Bull., 65/2, 312–332.
CVETKOVIĆ, M. (2013): Naftnogeološki potencijal i litostratigrafska razradba trećega neogensko-kvartarnoga megaciklusa u Savskoj depresiji [Lithostratigraphic units of the third Neogene-Quarternary megacycle in the Sava Depression and their petroleum
potential – In Croatian with an English Abstract].– Unpubl. PhD Thesis,
University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering, Zagreb, 175 p.
CVETKOVIĆ, M. (2016): Modelling of maturation, expulsion and accumulation of bacterial methane within Ravneš Member (Pliocene age), Croatia onshore.– Open Geosci., 8, 5–13. doi: 10.1515/geo-2016-0002
CVETKOVIĆ, M. & MALVIĆ, T. (2013): Defining electro-log markers in poorly consolidated, heterogeneous clastic sediments using standard deviation data trends – an example from the Sava Depression, Pannonian Basin System.– In: HORVÁTH, J., WÁGENHOFFER, A., GEIGER, J., CVETKOVIĆ, M. & MALVIĆ, T. (eds.): 16th Hungarian & 5th Croatian and Hungarian congress abstract and program book. Hungarian Geology Society & INA Oil Industry Plc., Szeged. doi:
10.13140/2.1.3191.0409
ĆORIĆ, S., PAVELIĆ, D., RÖGL, F., MANDIC, O., VRABAC, S., AVANIĆ, R., JERKOVIĆ, L., & VRANJKOVIĆ, A. (2009): Revised Middle Miocene datum for initial marine flooding of North Croatian Basins (Pannonian Basin System, Central Paratethys).– Geol. Croat., 62/1, 31–43. doi: 10.4154/GC.2009.03
GRIZELJ, A., PEH, Z., TIBLJAŠ, D., KOVAČIĆ, M. & KUREČIĆ, T. (2017): Mineralogical and geochemical characteristics of Miocene politic sedimentary rocks from the south-western part of the Pannonian Basin System (Croatia): Implications for provenance studies.– Geoscience Frontiers, 8, 65–80. doi: 10.1016/j.gsf.2015.11.009
FERENC, F., FEGYCERNEKI, S., HÁMÓR-VIDO, M. & LÖVEI, J. (2001): A Possible Way of Statistical Analysis at Small Sample Size.– In: LAKATOS, I. (eds.): Novelties in Enhanced Oil and Gas Recovery. Akadémiai Kiadó, Budapest, 1–14.
HERNITZ, Z., VELIĆ, J., KRANJEC, V. & NAJDENOVSKI, J. (1980): Prikaz diferencijalnih i maloamplitudnih struktura s primjerima iz Savske potoline (Panonski bazen) [Diferential and small amplitude structures examples from Sava Depression (Pannonian Basin) – In Croatian].– Nafta, 7–8, 399–409.
HURLEY, N.F. (1994): Recognition of Faults, Unconformities and Sequence Boundaries using Cumulative Dip Plots.– AAPG Bull., 78/8, 1173–1185.
LAPKOVSKY, V.V., ISTOMIN, A.V. KONTOROVICH, V.A. & BERDOV, V.A. (2015): Correlation of well logs as a multidimensional optimization problem.– Russ. Geol. Geophys., 56/3, 489–492. doi: 10.1016/j.rgg.2015.02.009
LUTHI, S.M. & BRYANT, D. (1997): Well-Log Correlation Using a Back-Propagation Neural Network.– Math. Geol., 29/3, 413–425. doi: 10.1007/BF02769643
MANDIĆ, O., KUREČIĆ, T., NEUBAUER, T.A. & HARZHAUSER, M. (2015): Stratigraphic and palaeogeographic significance of lacustrine molluscs from the Pliocene Viviparus beds in central Croatia.– Geol. Croat., 68/3, 179–207. doi:10.4154/gc.2015.15
PLETIKAPIĆ, Z. (1969): Stratigrafija, paleogeografija i naftoplinonosnost Ivanić-Grad formacije na obodu Moslavačkog masiva [Stratigraphy, palaeogeography and petroleum geology of Ivanić-Grad formation on the edge of Moslavačka gora Mt. –[in Croatian].– Unpubl. PhD Thesis, University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering, Zagreb, 71 p.
PODBOJEC, M. & CVETKOVIĆ, M. (2016): Preliminary estimate of CO2 storage capacity by petrophysical modelling in Upper Miocene Poljana Sandstones in the western part of the Sava Depression.– The Mining-Geology-Petroleum Engineering Bulletin, 31/1, 31–44. doi: 10.17794/rgn.2016.1.3
RÖGL, F. (1996): Stratigraphic Correlation of the Paratethys Oligocene and Miocene. – Mitteilungen Ges. Geol. Bergbaustudenten Österreich, 41, 65–73.
SAFTIĆ, B., VELIĆ, J., SZTANÓ, O., JUHÁSZ, G. & IVKOVIĆ, Ž. (2003): Tertiary subsurface facies, source rocks and hydrocarbon reservoirs in the SW part of the Pannonian Basin (northern Croatia and south–western Hungary).– Geol. Croat., 56/1, 101–122. doi: 10.4154/232
ŠIMON, J. (1973): O nekim rezultatima regionalne korelacije litostratigrafskih jedinica u jugozapadnom području Panonskog bazena [Results of regional well log correlation of lithostratigraphic units in Southwestern part of Pannonian Basin – In Croatian].– Nafta, 24/12, 623–630.
ŠIMON, J. (1980): Prilog stratigrafiji u taložnom sustavu pješčanih rezervoara Savagrupe naslaga mlađeg tercijara u Panonskom bazenu sjeverne Hrvatske [An Addition to the stratigraphy of the sedimentary system of sandstone reservoirs of Sava group in younger Tertiary in Pannonian Basin of the Northern Croatia area – In Croatian].– Unpubl. PhD Thesis, University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering, Zagreb, 66 p.
VELIĆ, J., MALVIĆ, T., CVETKOVIĆ, M. & BOŠNJAK, M. (2012): Statistical Analysis of Dipmeter Logs from Exploration Wells in the Drava Depression, Northern Croatia.– Journal of Petroleum Geology, 35/4, 343–356. doi: 10.1111/j.1747-5457.2012.00534.x
VELIĆ, J., WEISSER, M., SAFTIĆ, B., VRBANAC, B. & IVKOVIĆ, Ž. (2002): Petroleum-geological characteristics and exploration level of the three Neogene depositional megacycles in the Croatian part of the Pannonian basin.– Nafta, 53/6–7, 239–249.
VRBANAC, B. (2002). Facies and facies architecture of the Ivanić-Grad Formation (Late Pannonian)-Sava Depression, NW Croatia.– Geol. Croat., 55/1, 57–77. doi: 10.4154/GC.2002.06