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Technical Journals

"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

"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.

"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.

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