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Technical Journals

"Meeting the Challenge of Distinguishing ‘Fizz’ from Commercial Gas": Michelena, R.J., Explorer AAPG , 2024, June, 32-35..

"Distinguishing fizz gas from commercial gas": Michelena, R., Geohorizons, 2023,, November, 43-46..

"Practical Bayesian Inversions for Rock Composition and Petrophysical Endpoints in Multimineral Analysis": Cheng, L., Jin, G., Michelena, R., and Tura, A., 2022, SPE Reservoir Evaluation & Engineering, SPE-210576-PA, 1-17.

"Using rock-physics models to validate rock composition from multimineral log analysis": Cheng, L., Prasad, M., Michelena, R.J., Tura, A., Akther, S., Angelov, P.V., and Srinivasa, R.N., 2022, Geophysics, 87, MR49–MR62.

"Seismic, geologic, geomechanics, and dynamic constraints in flow models of unconventional fractured reservoirs: Example from a south Texas field”: Michelena, R.J., Gilman, J.R., and Zahm, C.K, 2019, The Leading Edge, 38, 116-122.

“Integrated facies modeling in unconventional reservoirs using a frequentist approach: example from a South Texas field”: Michelena, R.J., Godbey, K.S., and Angola, O.G., 2017, Geophysics, 82, B219-B230.

“Seismic data key for flow simulation”: Michelena, R.J., Meng, H.Z., Godbey, K.S., and Gilman, J.R., 2015, American Oil and Gas Reporter, 65-69.

“Strain amplitude dependence of shear modulus in heavy oils: Rheometer versus tension/compression technique” Rodrigues P.E., Batzle M.L., 2015 Geophysics 80, L35-L43

“Shear modulus of heavy oils: Confinement effects in rheometer measurements”, Rodrigues P.E., Batzle M.L., 2015, Fuel 153, 520-525

“Shear Modulus of Heavy Oils, Rheometer Measurements: Confinement Effect and Amplitude Dependence”, Rodrigues P.E., 2014, Ph.D. Thesis, Colorado School of Mines

“Estimation of dispersion in orientations of natural fractures from seismic data: application to DFN modeling and flow simulation”: Michelena, R.J., Godbey, K.S., Wang, H., Gilman, J.R., and Zahm, C.K., 2013, The Leading Edge, 32, 1502-1512.

“Introduction to this special section: Practical applications of anisotropy”: Lynn, H. and Michelena, R.J., 2011, The Leading Edge, 30, 726-730.

“Facies probabilities from multidimensional crossplots of seismic attributes: Application to tight gas Mamm Creek Field, Piceance Basin, Colorado”: Michelena, R.J., Godbey, K.S., and Rodrigues, P.E., 2011, The Leading Edge, 30, 62-69.

“Constraining 3D facies modeling by seismic-derived facies probabilities: Example from the tight-gas Jonah Field”: Michelena, R.J., Godbey, K., S., and Angola, O., 2009, The Leading Edge, 28, 1470-1476.

“Comparison of shear impedances inverted from stacked PS and SS data: Example from Rulison Field, Colorado”: Guliyev, E. and Michelena, R.J., 2009, The Leading Edge, 28, 1388-1393.

“Infill well evaluations of Jonah Field tight gas: characterization and simulation of complex architectural elements”: Michelena, R.J., Gilman, J.R., Angola, O., and Pasternak, I., 2009, First Break, 27, 73-81.

“Geomodeling guides Jonah infill Wells”: Michelena, R.J., Gilman, J.R., Angola, O., Uland, M., Meng, H., Fleming, C., 2007, The American Oil and Gas Reporter.

“Processing and geometric attribute analysis of 3D PS-converted waves”: D’Agosto, C., Marfurt, K. and Michelena, R.J., 2005, The Leading Edge, 24, 512-514.

“Near and far offset P-to-S elastic impedance for discriminating fizz water from commercial gas”: Gonzalez, E. F, Mukerji, T., and Michelena, R.J., 2003, The Leading Edge, 22, 1012- 1015.

“Lithologic characterization of a reservoir using continuous wavelet transforms'': Alvarez, G., Sansó, B., Michelena, R., and Jiménez, J.R., 2003, IEEE Transactions in Geoscience and Remote Sensing, 41, 59-65.

“From seismic attributes to pseudo well log volumes using neural networks: practical considerations”: Banchs, R., and Michelena, R.J., 2002, The Leading Edge, 21, 996-1001.

“Using multicomponent seismic for reservoir characterization in Venezuela”: Michelena, R.J., Donati, M. S., Valenciano, A. A. and D'Agosto, C., 2001, The Leading Edge, 20, 1036-1041.

“Multicomponent technology: the players, problems, applications, and trends”: Gaiser, J., Moldoveanu, N., MacBeth, C., Michelena, R.J., and Spitz, S., 2001, The Leading Edge, 20, 974- 977.

“A fast and global two-point low storage optimization technique for tracing rays in 2D and 3D isotropic media”: Cores, D., Fung, G. M., and Michelena, R.J., 2000, Journal of Applied Geophysics, 45, p. 273-287.

"Fracture detection in a carbonate reservoir using a variety of seismic methods": Pérez, M.A., Grechka, V., and Michelena, R.J., 1999, Geophysics, 64, 1266-1276.

"How to combine seismic attribute maps: Applications in two Venezuelan fields": Wessolossky, A.M., Jiménez, J.R., Michelena, R.J., 1999, Visión Tecnológica, 7, 23-28.

"Similarity maps: a new tool to summarize seismic attributes information": Michelena, R.J., González, E., and Capello de P., M., 1998, The Leading Edge, 17, 545-548.

"Crosswell tomographic estimation of elastic constants in heterogeneous transversely isotropic media": Michelena, R.J., Harris. J., Muir. F., 1995, Geophysics, 60, 774-783.

“Mapping distribution of fractures in a reservoir with P-S converted waves”: Ata, E. and Michelena, R.J., 1995, The Leading Edge, 14, 664-673.

“Elastic constants of transversely isotropic media from constrained aperture traveltimes”: Michelena, R.J., 1994, Geophysics, 59, 658-667.

“Anisotropic traveltime tomography”: Michelena, R.J., Muir, F., and Harris, J.M., 1993, Geophys. Prosp., 41, 381-412.

“Anisotropic traveltime tomography”: Michelena, R.J., 1993, Ph.D. Thesis, Stanford University.

“Singular-value decomposition for cross-well tomography”: Michelena, R.J., 1993, Geophysics, 58, 1665-1661.

“Tomographic traveltime inversion using natural pixels”: Michelena, R.J. and Harris, J. M., 1991, Geophysics, 56, 635-653.

Proceeding of Conferences

"Developing a regional Montney mineral model solution and applications for well placement optimization: A case study from NEBC": Woods, C., and Rodrigues, P., GUSSOW 2024, Montney Subsurface Evaluation, Banff, AB,, Canada.

"Bayesian inversion for rock composition and petrophysical endpoints in multimineral analysis": Cheng, L., Jin, G., and Michelena, R.J., 2021, SEG Technical Program Expanded Abstract, 2383-2387.

"Petrophysical multimineral analysis using genetic optimization to solve complex mineral composition in unconventional reservoirs": Michelena, R.J., Godbey, K.S., Uland, M.J., and Rodrigues, P.E., 2020, SEG Technical Program Expanded Abstract, 2459-2463.

"Quick Evaluation for Optimal Recovery in Unconventional Reservoirs": Michelena, R.J., Wang, H., and Gilman, J.R., 2020, Unconventional Reservoir Technology Conference URTeC 1341.

“Seismic, geologic, geomechanics, and dynamic constraints in flow models of fractured reservoirs”: Michelena, R.J., Gilman, J.R., and Zahm, C.K., 2018, SEG Technical Program Expanded Abstract, 3231-3235.

“Facies modeling in unconventional reservoirs using seismic derived facies probabilities”: Michelena, R.J., Angola, O., G., and Godbey, K.S., 2016, SEG Technical Program Expanded Abstract, 2866-2870.

“Unconventional Reservoir Model Predictions Using Massively-Parallel GPU Flow-Simulation: Part-1 Bakken Reservoir Characterization Choices and Parameter Testing”: Gilman, J.R., Uland, M., Angola, O., Michelena, R., Meng, H., Esler, K., Mukundakrishnan, K., and Natoli, V.: 2015, Unconventional Reservoir Technology Conference URTeC 2153938.

“Flow simulation models for unconventional reservoirs: the role of seismic data”: Michelena, R.J., Meng, H. Z., Godbey, K. S., 2014, SEG Technical Program Expanded Abstract, 4427–4431.

“Shear modulus of heavy oils, rheometer vs. tension/compression techniques: Solid to liquid transition due to strain amplitude effects”: Rodrigues P.E., Batzle M.L, 2014, SEG Technical Program Expanded Abstracts, 2778-2782.

“Estimation of dispersion in orientations of natural fractures from seismic data: application to discrete fracture network modeling”: Michelena, R.J., Godbey, K.S., Wang, H., Gilman, J.R., and Zahm, C.K., 2013, Unconventional Resources Technology Conference, Denver, Colorado, 1874-1883.

“Shear modulus of heavy oils: Measuring at Low Frequencies” Rodrigues P, Batzle M, 2013, SEG Technical Program Expanded Abstracts, 2647-2652

"Facies probabilities from multidimensional crossplot of seismic attributes": Michelena, R.J., Godbey, K.S. and Rodrigues, P.E., 2010, SEG Technical Program Expanded Abstract, 1377-1381.

"Inversion of converted PS data in the poststack domain for shear impedance": Guliyev, E., and Michelena, R.J., 2010, SEG Technical Program Expanded Abstract, 2789-2793.

"Time-Lapse Vp/Vs analysis for pressure mapping, Rulison Field, Colorado": Mesa, R.G., Davis, T.L., and Michelena, 2008, R.J., SEG Technical Program Expanded Abstract, 1560-1564.

"Vp-Vs ratio sensitivity to pressure, fluid and lithology changes in tight gas sandstones": Rojas, E., Davis, T.L., Batzle, M., Prasad, M., and Michelena, R.J., 2005, SEG Technical Program Expanded Abstract, 1401-1404.

"Far offset P-to-S “elastic impedance” for lithology and partial gas saturation (fizz water) identification: application with well logs": Gonzalez, E.F., Mukerji, T., Mavko, G., and Michelena, R.J., 2003, SEG Technical Program Expanded Abstract, 1446-1449.

"Estimation of petrophysical properties using multiple attributes: perturbing linear regressions": Michelena, R. and Jimenez, J., 2001, SEG Technical Program Expanded Abstract, 1560- 1563.

“Estimation of fluid properties using NMR correlations in Berea rocks”, Rodrigues P, Romero, P. 2001 SPE Conference, SPE 69608.

“Neural networks models for estimation of fluid properties”, Alcocer, Y Rodrigues P. 2001 SPE Conference, SPE 69624.

"Well log estimates and confidence intervals by using artificial neural networks": Banchs, R., and Michelena, R.J., 2000, SEG Technical Program Expanded Abstract, 1430-1432.

"Stratigraphic inversion of post-stack PS converted waves data": Valenciano, A., and Michelena, R.J., 2000, SEG Technical Program Expanded Abstract, 150-153.

“NMR signal pattern classification from estimation of petrophysical properties”, Rodrigues P, Alcocer, Y and Matheus J. 2000 SPE Conference, SPE 63258.

"Facies recognition using wavelet based fractal analysis on compressed seismic data": Jiménez, J.R., Peinado, A., and Michelena, R.J., 1999, SEG Technical Program Expanded Abstract, 1922-1925.

"Tomography + pre-stack depth migration of P-S converted waves": D’Agosto, C., Donati, M.S., and Michelena, R.J.,1998, SEG Technical Program Expanded Abstract, 1361-1364.

"Estimation of elastic constants from ellipsoidal velocities in orthorhombic media": Contreras, P., Klíe, H., and Michelena, R.J., 1998, SEG Technical Program Expanded Abstract, 1491-1494.

"Carbonate reservoirs and seismic attributes": Capello de P., M., González, E., and Michelena, R.J., 1997, How far can they go together? SEG Technical Program Expanded Abstract, 696- 699.

"Use of seismic attributes at Lake Maracaibo to reduce exploratory risk": Capello, M., Michelena, R., González, E., Peinado, A., Araujo, M., Tizón, F, 1997, Offshore Technology Conference OTC 8276, 67-73.

"Tomographic estimation of compressional and shear wave velocities from P-S converted waves": D’Agosto, C. and Michelena, R.J., 1997, SEG Technical Program Expanded Abstract, 1885-1888.

"Use of similarity maps to summarize seismic attributes: Two case histories": González, E., Capello de P., M. and Michelena, R.J., 1997, SEG Technical Program Expanded Abstract, 2034- 2037.

"Effects of binning parameters on lateral and vertical resolution of P-S converted waves": Sierra, J., Michelena, R.J., and Ata, E., 1995, Proceedings of the IV Congresso International Da Sociedade Brasileira de Geofísica, 382-385.

"VSP-CDP transform in anisotropic media": Vásquez, C. and Michelena, R.J., 1995, Proceedings of the IV Congresso Internacional Da Sociedade Brasileira de Geofísica, 150-153.

"Quantifying errors in fracture orientation estimated from surface P-S converted waves": Michelena, R.J., 1995, SEG Technical Program Expanded Abstract, 282-285.

"Exploiting P-S converted waves: Part 1, modeling the effects of anisotropy and heterogeneities": Michelena, R.J., Ata, E., and Sierra, J., 1994, SEG Technical Program Expanded Abstract, 236-239.

"Exploiting P-S converted waves: Part 2, application to a fractured reservoir": Ata, E., Michelena, R.J., González, M., Cerquone, H., and Martin, C., 1994, SEG Technical Program Expanded Abstract, 240-243.

"P-wave anisotropy in shales from crosswell data": Harris, J.M., Dahlhaus, L., and Michelena, R.J., 1994, SEG Technical Program Expanded Abstract, 1125-1128.

"Tomographic estimation of elastic constants in heterogeneous transversely isotropic media": Michelena, R.J., Harris, J., and Muir, F., 1993, SEG Technical Program Expanded Abstract, 630-633.

"Traveltime tomography in azimuthally anisotropic media": Michelena, R.J., 1992, SEG Technical Program Expanded Abstract, 757-761.

"Tomographic string inversion": Harris, J.M., Lazaratos, S., and Michelena, R.J., 1990, SEG Technical Program Expanded Abstract, 82-85.

"Tomographic traveltime inversion using natural pixels": Michelena, R.J. and Harris, J.M., 1990, SEG Technical Program Expanded Abstract, 78-81

Lithology Characterization and Modeling

“Integrated facies modeling in unconventional reservoirs using a frequentist approach: example from a South Texas field”: Michelena, R.J., Godbey, K.S., and Angola, O.G., 2017, Geophysics, 82, B219-B230.

“Facies modeling in unconventional reservoirs using seismic derived facies probabilities”: Michelena, R.J., Angola, O., G., and Godbey, K.S., 2016, SEG Technical Program Expanded Abstract, 2866-2870.

“Unconventional Reservoir Model Predictions Using Massively-Parallel GPU Flow-Simulation: Part-1 Bakken Reservoir Characterization Choices and Parameter Testing”: Gilman, J.R., Uland, M., Angola, O., Michelena, R., Meng, H., Esler, K., Mukundakrishnan, K., and Natoli, V.: 2015, Unconventional Reservoir Technology Conference URTeC 2153938.

“Seismic data key for flow simulation”: Michelena, R.J., Meng, H.Z., Godbey, K.S., and Gilman, J.R., 2015, American Oil and Gas Reporter, 65-69.

“Flow simulation models for unconventional reservoirs: the role of seismic data”: Michelena, R.J., Meng, H. Z., Godbey, K. S., 2014, SEG Technical Program Expanded Abstract, 4427- 4431.

“Facies probabilities from multidimensional crossplots of seismic attributes: Application to tight gas Mamm Creek Field, Piceance Basin, Colorado”: Michelena, R.J., Godbey, K.S., and Rodrigues, P.E., 2011, The Leading Edge, 30, 62-69.

"Facies probabilities from multidimensional crossplot of seismic attributes": Michelena, R.J., Godbey, K.S. and Rodrigues, P.E., 2010, SEG Technical Program Expanded Abstract, 1377-1381.

“Constraining 3D facies modeling by seismic-derived facies probabilities: Example from the tight-gas Jonah Field”: Michelena, R.J., Godbey, K., S., and Angola, O., 2009, The Leading Edge, 28, 1470-1476.

“Infill well evaluations of Jonah Field tight gas: characterization and simulation of complex architectural elements”: Michelena, R.J., Gilman, J.R., Angola, O., and Pasternak, I., 2009, First Break, 27, 73-81.

"Time-Lapse Vp/Vs analysis for pressure mapping, Rulison Field, Colorado": Mesa, R.G., Davis, T.L., and Michelena, R.J., 2008, SEG Technical Program Expanded Abstract, 1560-1564.

“Geomodeling guides Jonah infill Wells”: Michelena, R.J., Gilman, J.R., Angola, O., Uland, M., Meng, H., Fleming, C., 2007, The American Oil and Gas Reporter.

"Vp-Vs ratio sensitivity to pressure, fluid and lithology changes in tight gas sandstones": Rojas, E., Davis, T.L., Batzle, M., Prasad, M., and Michelena, R.J., 2005, SEG Technical Program Expanded Abstract, 1401-1404.

“Lithologic characterization of a reservoir using continuous wavelet transforms'': Alvarez, G., Sansó, B., Michelena, R., and Jiménez, J.R., 2003, IEEE Transactions in Geoscience and Remote Sensing, 41, 59-65.

“From seismic attributes to pseudo well log volumes using neural networks: practical considerations”: Banchs, R., and Michelena, R.J., 2002, The Leading Edge, 21, 996-1001.

“Using multicomponent seismic for reservoir characterization in Venezuela”: Michelena, R.J., Donati, M. S., Valenciano, A. A. and D'Agosto, C., 2001, The Leading Edge, 20, 1036-1041.

"Estimation of petrophysical properties using multiple attributes: perturbing linear regressions": Michelena, R. and Jimenez, J., 2001, SEG Technical Program Expanded Abstract, 1560- 1563.

"Well log estimates and confidence intervals by using artificial neural networks": Banchs, R., and Michelena, R.J., 2000, SEG Technical Program Expanded Abstract, 1430-1432.

"Facies recognition using wavelet based fractal analysis on compressed seismic data": Jimenez, J.R., Peinado, A., and Michelena, R.J., 1999, SEG Technical Program Expanded Abstract, 1922-1925.

"How to combine seismic attribute maps: Applications in two Venezuelan fields": Wessolossky, A.M., Jiménez, J.R., Michelena, R.J., 1999, Visión Tecnológica, 7, 23-28.

"Similarity maps: a new tool to summarize seismic attributes information": Michelena, R.J., González, E., and Capello de P., M., 1998, The Leading Edge, 17, 545-548.

"Carbonate reservoirs and seismic attributes: How far can they go together?": Capello de P., M., González, E., and Michelena, R.J., 1997, SEG Technical Program Expanded Abstract, 696- 699.

"Use of seismic attributes at Lake Maracaibo to reduce exploratory risk": Capello, M., Michelena, R., González, E., Peinado, A., Araujo, M., Tizón, F, 1997, Offshore Technology Conference OTC 8276, 67-73.

"Use of similarity maps to summarize seismic attributes: Two case histories": González, E., Capello de P., M. and Michelena, R.J., 1997, SEG Technical Program Expanded Abstract, 2034- 2037.

“Mapping distribution of fractures in a reservoir with P-S converted waves”: Ata, E. and Michelena, R.J., 1995, The Leading Edge, 14, 664-673.

"Exploiting P-S converted waves: Part 2, application to a fractured reservoir": Ata, E., Michelena, R.J., González, M., Cerquone, H., and Martin, C., 1994, SEG Technical Program Expanded Abstract, 240-243.

Natural Fractures Characterization and Modeling

"Quick Evaluation for Optimal Recovery in Unconventional Reservoirs": Michelena, R.J., Wang, H., and Gilman, J.R., 2020, Unconventional Reservoir Technology Conference URTeC 1341.

"Seismic, geologic, geomechanics, and dynamic constraints in flow models of unconventional fractured reservoirs: Example from a south Texas field”: Michelena, R.J., Gilman, J.R., and Zahm, C.K, 2019, The Leading Edge, 38, 116-122.

“Seismic, geologic, geomechanics, and dynamic constraints in flow models of fractured reservoirs”: Michelena, R.J., Gilman, J.R., and Zahm, C.K., 2018, SEG Technical Program Expanded Abstract, 3231-3235.

“Flow simulation models for unconventional reservoirs: the role of seismic data”: Michelena, R.J., Meng, H. Z., Godbey, K. S., 2014, SEG Technical Program Expanded Abstract, 4427- 4431.

“Estimation of dispersion in orientations of natural fractures from seismic data: application to DFN modeling and flow simulation”: Michelena, R.J., Godbey, K.S., Wang, H., Gilman, J.R., and Zahm, C.K., 2013, The Leading Edge, 32, 1502-1512.

“Introduction to this special section: Practical applications of anisotropy”: Lynn, H. and Michelena, R.J., 2011, The Leading Edge, 30, 726-730.

"Fracture detection in a carbonate reservoir using a variety of seismic methods": Pérez, M.A., Grechka, V., and Michelena, R.J., 1999, Geophysics, 64, 1266-1276.

“Mapping distribution of fractures in a reservoir with P-S converted waves”: Ata, E. and Michelena, R.J., 1995, The Leading Edge, 14, 664-673.

"Quantifying errors in fracture orientation estimated from surface P-S converted waves": Michelena, R.J., 1995, SEG Technical Program Expanded Abstract, 282-285.

"Exploiting P-S converted waves: Part 2, application to a fractured reservoir": Ata, E., Michelena, R.J., González, M., Cerquone, H., and Martin, C., 1994, SEG Technical Program Expanded Abstract, 240-243.

Multicomponent Seismic

“Facies probabilities from multidimensional crossplots of seismic attributes: Application to tight gas Mamm Creek Field, Piceance Basin, Colorado”: Michelena, R.J., Godbey, K.S., and Rodrigues, P.E., 2011, The Leading Edge, 30, 62-69.

"Inversion of converted PS data in the poststack domain for shear impedance": Guliyev, E., and Michelena, R.J., 2010, SEG Technical Program Expanded Abstract, 2789-2793.

“Comparison of shear impedances inverted from stacked PS and SS data: Example from Rulison Field, Colorado”: Guliyev, E. and Michelena, R.J., 2009, The Leading Edge, 28, 1388-1393.

"Time-Lapse Vp/Vs analysis for pressure mapping, Rulison Field, Colorado": Mesa, R.G., Davis, T.L., and Michelena, R.J., 2008, SEG Technical Program Expanded Abstract, 1560-1564.

“Processing and geometric attribute analysis of 3D PS-converted waves”: D’Agosto, C., Marfurt, K. and Michelena, R.J., 2005, The Leading Edge, 24, 512-514.

"Vp-Vs ratio sensitivity to pressure, fluid and lithology changes in tight gas sandstones": Rojas, E., Davis, T.L., Batzle, M., Prasad, M., and Michelena, R.J., 2005, SEG Technical Program Expanded Abstract, 1401-1404.

“Near and far offset P-to-S elastic impedance for discriminating fizz water from commercial gas”: Gonzalez, E. F, Mukerji, T., and Michelena, R.J., 2003, The Leading Edge, 22, 1012- 1015.

“Multicomponent technology: the players, problems, applications, and trends”: Gaiser, J., Moldoveanu, N., MacBeth, C., Michelena, R.J., and Spitz, S., 2001, The Leading Edge, 20, 974- 977.

“Using multicomponent seismic for reservoir characterization in Venezuela”: Michelena, R.J., Donati, M. S., Valenciano, A. A. and D'Agosto, C., 2001, The Leading Edge, 20, 1036-1041.

"Stratigraphic inversion of post-stack PS converted waves data": Valenciano, A., and Michelena, R.J., 2000, SEG Technical Program Expanded Abstract, 150-153.

"Tomography + pre-stack depth migration of P-S converted waves": D’Agosto, C., Donati, M.S., and Michelena, R.J.,1998, SEG Technical Program Expanded Abstract, 1361-1364.

"Tomographic estimation of compressional and shear wave velocities from P-S converted waves": D’Agosto, C. and Michelena, R.J., 1997, SEG Technical Program Expanded Abstract, 1885-1888.

“Mapping distribution of fractures in a reservoir with P-S converted waves”: Ata, E. and Michelena, R.J., 1995, The Leading Edge, 14, 664-673.

"Effects of binning parameters on lateral and vertical resolution of P-S converted waves": Sierra, J., Michelena, R.J., and Ata, E., 1995, Proceedings of the IV Congresso International Da Sociedade Brasileira de Geofísica, 382-385.

"Quantifying errors in fracture orientation estimated from surface P-S converted waves": Michelena, R.J., 1995, SEG Technical Program Expanded Abstract, 282-285.

"Exploiting P-S converted waves: Part 1, modeling the effects of anisotropy and heterogeneities": Michelena, R.J., Ata, E., and Sierra, J., 1994, SEG Technical Program Expanded Abstract, 236-239.

"Exploiting P-S converted waves: Part 2, application to a fractured reservoir": Ata, E., Michelena, R.J., González, M., Cerquone, H., and Martin, C., 1994, SEG Technical Program Expanded Abstract, 240-243.

Numerical Optimization and Inversion

"Practical Bayesian Inversions for Rock Composition and Petrophysical Endpoints in Multimineral Analysis": Cheng, L., Jin, G., Michelena, R., and Tura, A., 2022, SPE Reservoir Evaluation & Engineering, SPE-210576-PA, 1-17.

"Using rock-physics models to validate rock composition from multimineral log analysis": Cheng, L., Prasad, M., Michelena, R.J., Tura, A., Akther, S., Angelov, P.V., and Srinivasa, R.N., 2022, Geophysics, 87, MR49–MR62.

"Bayesian inversion for rock composition and petrophysical endpoints in multimineral analysis": Cheng, L., Jin, G., and Michelena, R.J., 2021, SEG Technical Program Expanded Abstract, 2383-2387.

"Petrophysical multimineral analysis using genetic optimization to solve complex mineral composition in unconventional reservoirs": Michelena, R.J., Godbey, K.S., Uland, M.J., and Rodrigues, P.E., 2020, SEG Technical Program Expanded Abstract, 2459-2463.

"iMineralysis™ as a tool to optimize petrophysical multimineral analysis": Michelena, R.J., and Godbey, K.S., 2018, theoretical review: white paper.

“Integrated facies modeling in unconventional reservoirs using a frequentist approach: example from a South Texas field”: Michelena, R.J., Godbey, K.S., and Angola, O.G., 2017, Geophysics, 82, B219-B230.

“Facies modeling in unconventional reservoirs using seismic derived facies probabilities”: Michelena, R.J., Angola, O., G., and Godbey, K.S., 2016, SEG Technical Program Expanded Abstract, 2866-2870.

“Facies probabilities from multidimensional crossplots of seismic attributes: Application to tight gas Mamm Creek Field, Piceance Basin, Colorado”: Michelena, R.J., Godbey, K.S., and Rodrigues, P.E., 2011, The Leading Edge, 30, 62-69.

"Inversion of converted PS data in the poststack domain for shear impedance": Guliyev, E., and Michelena, R.J., 2010, SEG Technical Program Expanded Abstract, 2789-2793.

"Estimation of petrophysical properties using multiple attributes: perturbing linear regressions": Michelena, R. and Jimenez, J., 2001, SEG Technical Program Expanded Abstract, 1560- 1563.

“A fast and global two-point low storage optimization technique for tracing rays in 2D and 3D isotropic media”: Cores, D., Fung, G. M., and Michelena, R.J., 2000, Journal of Applied Geophysics, 45, p. 273-287.

"Well log estimates and confidence intervals by using artificial neural networks": Banchs, R., and Michelena, R.J., 2000, SEG Technical Program Expanded Abstract, 1430-1432.

"Estimation of elastic constants from ellipsoidal velocities in orthorhombic media": Contreras, P., Klíe, H., and Michelena, R.J., 1998, SEG Technical Program Expanded Abstract, 1491-1494.

"Tomographic estimation of compressional and shear wave velocities from P-S converted waves": D’Agosto, C. and Michelena, R.J., 1997, SEG Technical Program Expanded Abstract, 1885-1888.

"Crosswell tomographic estimation of elastic constants in heterogeneous transversely isotropic media": Michelena, R.J., Harris. J., Muir. F., 1995, Geophysics, 60, 774-783.

"VSP-CDP transform in anisotropic media": Vásquez, C. and Michelena, R.J., 1995, Proceedings of the IV Congresso Internacional Da Sociedade Brasileira de Geofísica, 150-153.

“Elastic constants of transversely isotropic media from constrained aperture traveltimes”: Michelena, R.J., 1994, Geophysics, 59, 658-667.

"P-wave anisotropy in shales from crosswell data": Harris, J.M., Dahlhaus, L., and Michelena, R.J., 1994, SEG Technical Program Expanded Abstract, 1125-1128.

“Anisotropic traveltime tomography”: Michelena, R.J., Muir, F., and Harris, J.M., 1993, Geophys. Prosp., 41, 381-412.

“Anisotropic traveltime tomography”: Michelena, R.J., 1993, Ph.D. Thesis, Stanford University.

“Singular-value decomposition for cross-well tomography”: Michelena, R.J., 1993, Geophysics, 58, 1665-1661.

"Tomographic estimation of elastic constants in heterogeneous transversely isotropic media": Michelena, R.J., Harris, J., and Muir, F., 1993, SEG Technical Program Expanded Abstract, 630-633.

"Traveltime tomography in azimuthally anisotropic media": Michelena, R.J., 1992, SEG Technical Program Expanded Abstract, 757-761.

“Tomographic traveltime inversion using natural pixels”: Michelena, R.J. and Harris, J. M., 1991, Geophysics, 56, 635-653.

"Tomographic string inversion": Harris, J.M., Lazaratos, S., and Michelena, R.J., 1990, SEG Technical Program Expanded Abstract, 82-85.

"Tomographic traveltime inversion using natural pixels": Michelena, R.J. and Harris, J.M., 1990, SEG Technical Program Expanded Abstract, 78-81.

Petrophysics and Rock Physics

"Practical Bayesian Inversions for Rock Composition and Petrophysical Endpoints in Multimineral Analysis": Cheng, L., Jin, G., Michelena, R., and Tura, A., 2022, SPE Reservoir Evaluation & Engineering, SPE-210576-PA, 1-17.

"Using rock-physics models to validate rock composition from multimineral log analysis": Cheng, L., Prasad, M., Michelena, R.J., Tura, A., Akther, S., Angelov, P.V., and Srinivasa, R.N., 2022, Geophysics, 87, MR49–MR62.

"Bayesian inversion for rock composition and petrophysical endpoints in multimineral analysis": Cheng, L., Jin, G., and Michelena, R.J., 2021, SEG Technical Program Expanded Abstract, 2383-2387.

"Petrophysical multimineral analysis using genetic optimization to solve complex mineral composition in unconventional reservoirs": Michelena, R.J., Godbey, K.S., Uland, M.J., and Rodrigues, P.E., 2020, SEG Technical Program Expanded Abstract, 2459-2463.

“Strain amplitude dependence of shear modulus in heavy oils: Rheometer versus tension/compression technique”: Rodrigues, P.E., Batzle, M.L., 2015 Geophysics 80, L35-L43

“Shear modulus of heavy oils: Confinement effects in rheometer measurements”: Rodrigues, P.E., Batzle, M.L., 2015, Fuel 153, 520-525

“Shear Modulus of Heavy Oils, Rheometer Measurements: Confinement Effect and Amplitude Dependence”: Rodrigues, P.E., 2014, Ph.D. Thesis, Colorado School of Mines

“Shear modulus of heavy oils, rheometer vs. tension/compression techniques: Solid to liquid transition due to strain amplitude effects”: Rodrigues, P.E., Batzle, M.L., 2014, SEG Technical Program Expanded Abstracts, 2778-2782

"Estimation of petrophysical properties using multiple attributes: perturbing linear regressions": Michelena, R. and Jimenez, J., 2001, SEG Technical Program Expanded Abstract, 1560- 1563.

“Estimation of fluid properties using NMR correlations in Berea rocks”: Rodrigues, P., Romero, P. 2001 SPE Conference, SPE 69608.

“Neural networks models for estimation of fluid properties”: Alcocer, Y. Rodrigues, P., 2001 SPE Conference, SPE 69624.

"Well log estimates and confidence intervals by using artificial neural networks": Banchs, R., and Michelena, R.J., 2000, SEG Technical Program Expanded Abstract, 1430-1432.

“NMR signal pattern classification for estimation of petrophysical properties”: Rodrigues. P., Alcocer, Y., and Matheus J., 2000 SPE Conference, SPE 63258.

Citations

Reinaldo J. Michelena

Patricia E. Rodrigues

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