The Use of Electromagnetic Mixing Rules for Petrophysical Evaluation of Dual- and Triple-Porosity Reservoirs
- Bukola K. Olusola (University of Calgary) | Guang Yu (University of Calgary) | Roberto Aguilera (University of Calgary)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Evaluation & Engineering
- Publication Date
- September 2013
- Document Type
- Journal Paper
- 378 - 389
- 2013. Society of Petroleum Engineers
- 5.6.1 Open hole/cased hole log analysis
- 5 in the last 30 days
- 671 since 2007
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Electromagnetic mixing rules such as the Maxwell-Garnett rule, the Bruggemanequation, and the coherent-potential formula, are shown to be useful for theevaluation of the porosity exponent m in naturally fractured reservoirsrepresented by dual- and triple porosity models. Comparisons are made with coredata from limestone, dolomite, and tight gas reservoirs to corroborate resultsfrom the theoretical models. Rigorous values of m reduce the uncertaintyin the calculated values of water saturation and, thus, improve the estimatesof hydrocarbons in place and recoveries, particularly in situations in whichsufficient data are not available to use the material-balance approach. Themain advantage of the new method developed in this paper for petrophysicalanalysis is that it can handle, with the use of a single equation, theindividual mixing rules previously mentioned, and at the same time, dependingon the availability of data, it can quantify the values of matrix, fracture,and nonconnected-vug porosity, and the porosity exponent of the total porositysystem. It is concluded that electromagnetic mixing rules provide a usefulmethodology for the petrophysical evaluation of complex dual- andtriple-porosity reservoirs.
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Aguilera, R. 2010. Effect of Fracture Dip and Fracture Tortuosity onPetrophysical Evaluation of Naturally Fractured Reservoirs. J. Cdn. Pet.Tech. 49 (9): 69-76. http://dx.doi.org/10.2118/139847-PA.
Aguilera, M.S. and Aguilera, R. 2003. Improved Models for PetrophysicalAnalysis of Dual Porosity Reservoirs. Petrophysics 44 (1):21-35.
Aguilera, R.F., and Aguilera, R. 2004. A Triple-Porosity Model forPetrophysical Analysis of Naturally Fractured Reservoirs. Petrophysics 45 (2): 157-166.
Aguilera, C.G. and Aguilera, R. 2009. Effect of Fracture Dip onPetrophysical Evaluation of Naturally Fractured Reservoirs. J. Cdn. Pet.Tech. 48 (7): 25-29. http://dx.doi.org/10.2118/09-07-25.
Al-Ghamdi, A., Chen, B., Behmanesh, H. et al. 2011. An ImprovedTriple-Porosity Model for Evaluation of Naturally Fractured Reservoirs. SPERes Eval & Eng 14 (4): 377-384. http://dx.doi.org/10.2118/132879-PA.
Archie, G.E. 1942.The Electrical Resistivity Log as an Aid in DeterminingSome Reservoir Characteristics. Trans., AIME 146 (1):54-62. http://dx.doi.org/10.2118/942054-G.
Berg, C.R. 2006. Dual Porosity Equations From Effective Medium Theory. PaperSPE 101698 presented at the SPE Annual Technical Conference and Exhibition, SanAntonio, Texas, 24-27 September. http://dx.doi.org/10.2118/101698-MS.
Byrnes, A.P., Cluff, R., and Webb, J. 2006. Analysis of CriticalPermeability, Capillary Pressure, and Electrical Properties for MESAVERDETight-Gas Sandstones From Western U.S. Basins, Quarterly Technical ProgressReport, DOE Contract No. DE-FC26-05NT43660.
Focke, J.W. and Munn, D. 1987. Cementation Exponents in Middle EasternCarbonates Reservoirs. SPE Form Eval 2 (2): 155-167. http://dx.doi.org/10.2118/13735-PA.
Kennedy, W.D. and Herrick, D.C. 2004. Conductivity Anisotropy in Shale-FreeSandstone. Petrophysics 45 (1): 38.
Lucia, F.J. 1983. Petrophysical Parameters Estimated From VisualDescriptions of Carbonates Rocks: A Field Classification of Carbonate PoreSpace. J. Pet Tech 35 (3): 629-637.
Lucia F.J. 1992. Carbonate Reservoir Models: Facies, Diagenesis, and FlowCharacterization: Part 6. In Geological Methods. AAPG, 269-274.
Maxwell, G.J.C. 1904. Colours in Metal Glasses and Metal Films. Trans. ofthe Royal Society,(London) CCIII: 385-420.
Ragland, D.A. 2002. Trends in Cementation Exponents (m) for CarbonatePore Systems. Petrophysics 43 (5).
Rasmus, J.C. and Kenyon, W.E. 1985. An Improved Petrophysical Evaluation ofOomoldic Lansing-Kansas City Formations Utilizing Conductivity and DielectricLog Measurements. Paper presented at the SPWLA Twenty-Sixth Annual LoggingSymposium, Dallas, Texas, 17-20 June.
Sen, P.N. Scala, C., and Cohen, M.H. 1981. A Self-Similar Model forSedimentary Rocks With Application to the Dielectric Constant of Fused GlassBeads. Geophysics 46: 781.
Seybold, J.S. 2005. Introduction to RF Propagation, Hoboken, NewJersey: John Wiley and Sons Inc.
Sihvola, A. 1999. Electromagnetic Mixing Formulas and Applications,Institute of Electrical Engineers, Chapters 8 and 9.
Towle, G. 1962. An Analysis of the Formation Resistivity Factor-PorosityRelationship of Some Assumed Pore Geometries. Paper presented at the ThirdAnnual Meeting of the Society of Professional Well Log Analysts, Houston,Texas, 17-18 May.