RMZ â MATERIALI IN GEOOKOLJE

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426 Adewale, A., Olawale, O. O., Martins, O. M.ConclusionThe high porosity and permeabilityvalues obtained and the degree of sortingof the reservoir sands are indicationsof a good reservoir quality in thestudy area. Also, the viscosity and specificgravity values obtained from theanalyses indicate highly viscous andlow specific gravity oil. These, coupledwith high asphaltene content arean indication of severe biodegradation.Moreover, result of API gravity equallyshowed that the deposits belong tothe class of heavy oil. The biodegraded,low viscous low API gravity of thetar which impregnated the sands explainsthe high resistivity value of thetar sands deposit around the study areain addition to the fact that molecularcompounds (hydrocarbons) are incapableof ionic conduction.The reservoir characteristics of the tarsands in Gbegude area are similar tothose earlier studied by other researchers,in that porosity values obtained fallbetween 16–24 %; percentage of finesranges from 1–7 %, and are mainly composedof kaolinitic clay and silt; depthof burial ranges from 0 m to >50 m; tarsand reservoir is about 18–72 m thick.ReferencesAdegoke, O. S., Enu, E. I., Ajayi, T. R.,Ako, B. D., Omatsola, M. E. & Afonja,A. A. (1981): Tarsand, a New EnergyRaw Material in Nigeria. Proc.Symp. On New Energy Raw Material,Karlovy Vary, p. 17–22.Adegoke, O. S., Ako, B. D., Enu, E. I(1980): Geotechnical Investigationsof Ondo State Bituminous Sands. Vol.1. Geology and Reserve Estimate,Report. Geological Consulting Unit,Dept. of Geology, University of Ife,Ile-Ife, pp. 257.Ako, B. D., Alabi, A. O., Adegoke, O. S.& Enu, E. I. (1983): Application of ResistivitySounding in the Explorationfor Nigerian Tar sand. Energy Explorationand Exploitation, Vol. 2, No. 2,p. 155–164.Burke, K. C. B., Dessauvagie, T. F. J.,Whiteman, A. J (1972): The Openingof the Gulf of Guinea and GeologicalHistory of Benue Depression and NigerDelta, Nature, Physical Science,233 (38), p. 12–21.Cole, R. D. & Christopher E. M. (1992):Reservoir Characterization of TensleepSandstone, South Casper Creek Field,Wyoming, and (abs): AAPG Bulletin,Vol. 76, No. 8, p. 1257.Dutton, S. P. & Finley R. J. (1988);Controls on Reservoir Quality inTight Sandstone of the Travis PeakFormation, East Texas: SPE FormationEvaluation, Vol. 3, No. 1, p.97–104.Enu, E. I. (1985): Textural Characteristicsof the Nigerian Tar sand. Sed. Geol.44, pp. 65–81.Folk, R. L. (1974): Petrology of SedimentaryRocks. Hemphill Publ. Co., Austin.Texas. pp. 159.Idowu, J. O., Ajiboye, S. A., Ilesanmi, M.<strong>RMZ</strong>-M&G 2012, 59
Geophysical and sedimentological studies for reservoir characterization of ...427A. & Tanimola, A. (1993): Origin andignificance of Organic Matter of OshosunFormation, South Western DahomeyBasin, Nigeria. Journal of Miningand Geology. Vol. 29, 9–17.Klemme, H. D. (1975): Geothermal Gradients,Heatflow and Hydrocarbon Recovery.In: A.G. Fischer and S.Judson(Eds), Petroleum and Global Tectonics.Princeton, New Jersey, PrincetonUniv. Press, pp. 251–304.Kingston, D. R., Dishroon, C. P. & Williams,P. A. (1983): Global Basin ClassificationSystem. AAPG. Bull., Vol.67, 2175–2193.Koefoed, O. (1979): Geosounding Principles1: Resistivity Sounding Measurements.Elsevier Science PublishingCompany, Amsterdam, pp: 635.Loke, M. H. (1999): Time lapse resistivityimaging inversion, Proceedings ofthe 5 th Meeting of the EEGS EuropeanSection, Em1.Lomando, A. J. (1986): Solid Hydrocarbon:A Migration of Fines Problemin Carbonate reservoirs (abs): AAPGBulletin, Vol.70, p. 612.Lomando, A. J. (1992): The Influence ofSolid Reservoir Bitumen on ReservoirQuality: AAPG Bulletin, Vol. 76, No.8, pp. 1137–1152.Mpanda, S. (1997): Geological developmentof east African coastal basin ofTanzania. Acta Universities, Stockholmiensis,Vol. 45, p. 121.Nwachukwu, S. O. & Ekweozor, C. M.(1989): Origin of Tar sands In SouthwesternNigeria. Nigeria Associationof Petroleum Exploration. Bulletin 4,p. 82–94.Omotsola, M. E. & Adegoke, O. S. (1981):Tectonic Evolution and CretaceousStratigraphy of the Dahomey Basin.Nig. Jour. Min. and Geol. Vol. 18, p.130–137.Schlumberger (1989): Log Interpretationprinciples; pp. 8–9.United State Geological Survey (2000):Producing Asphaltenic Crude Oils:Problems and Solutions. PetroleumEngineer, June edition, p. 24–31.Wallace, K. J. & John J. H. (1992): AnIntegrated Exploration Effort for MorrowSandstones in Southeast Colorado,(abs): AAPG Bull., Vol. 76, No.8, p. 1270.Whiteman, A. J. (1982): Nigeria: Its PetroleumGeology, Resources and Potential;p. 82–86.Winsauer, W. O., Shearin, H. M., Masson,P. H. & Williams, M. (1952):Resistivity of brine saturated sands inrelation to pore geometry. AAPG Bulletin.36, p. 2.<strong>RMZ</strong>-M&G 2012, 59
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IVTable of Contents - KazaloProfess
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Calculation of stress-strain depend
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() = (, )() () ()Calculation
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, ) (, )(, ) 1 () + = (, ) =
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RMZ - Materials and Geoenvironment,
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Petrochemical characteristics and g
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360 Akinola, O. O., Talabi, A. O.A
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Page 70 and 71: k =1.05+Dλ = 1+k =( s )396 Shemeto
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Page 74 and 75: у 3 b400 D = f eShemetov, P. A., B
Page 76 and 77: V4BEK Q σBEad = ,commQрσV 01 +
Page 78 and 79: 404 Shemetov, P. A., Bibik, I. P.wh
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Page 84 and 85: .6670.05=0.35k1,05+D avet( s3≥ Kt
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Contents476Phase contrast method fo
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Contents47859/4Calculation of stres
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Instructions to authors481Compositi
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Instructions to authors483NAVODILA
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Instructions to authors485Knjige:Ro
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