Publications by Type: Conference Proceedings

2013
C. Xu, Yang, Q., and Torres-Verdín, C., “Bayesian hypothesis testing: using fast well-log forward modeling to validate petrophysical rock typing and to quantify uncertainty in deepwater reservoirs (Expanded Abstract),” Society of Petrophysicists and Well Log Analysts 54th Annual Logging Symposium. Society of Petrophysicists and Well Log Analysts, New Orleans, LA, 2013.PDF icon PDF
C. Xu, Yang, Q., and Torres-Verdín, C., “Bayesian hypothesis testing: using fast well-log forward modeling to validate petrophysical rock typing and to quantify uncertainty in deepwater reservoirs (Expanded Abstract),” Society of Petrophysicists and Well Log Analysts (SPWLA) 54th Ann. Logging Symposium. New Orleans, Louisiana, 2013.PDF icon PDF
H. Adiguna and Torres-Verdín, C., “Comparative study for the interpretation of mineral concentrations, total porosity, and TOC in hydrocarbon-bearing shale from conventional well logs (Expanded Abstract),” Society of Petroleum Engineers 2013 Annual Technical Proceedings and Exhibition. Society of Petroleum Engineers, New Orleans, LA, 2013.PDF icon PDF
H. Adiguna and Torres-Verdín, C., “Comparative study for the interpretation of mineral concentrations, total porosity, and TOC in hydrocarbon-bearing shale from conventional well logs (Expanded Abstract),” Society of Petroleum Engineers (SPE) 2013 Annual Technical Conference and Exhibition. New Orleans, LA, 2013.PDF icon PDF
A. Aroonsri, Worthen, A. J., Hariz, T., Johnston, K. P., Huh, C., and Bryant, S. L., “Conditions for generating nanoparticle-stabilized CO2 foams in fracture and matrix flow,” SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 2013. Publisher's VersionAbstract
Foams used for mobility control in CO2 flooding, and for more secure sequestration of anthropogenic CO2, can be stabilized with nanoparticles, instead of surfactants, bringing some important advantages. The solid nature of the nanoparticles in stabilized foams allows them to withstand the high-temperature reservoir conditions for extended periods of time. They also have more robust stability because of the large adsorption energy required to bring the nanoparticles to the bubble interface. Silica nanoparticle-stabilized CO2-in-brine foams were generated by the co-injection of CO2 and aqueous nanoparticle dispersion through beadpacks, and through unfractured and fractured sandstone cores. Foam flow in rock matrix and fracture, both through Boise and Berea sandstones, was investigated. The apparent viscosity measured from foam flow in various porous media was also compared with that measured in a capillary tube, installed downstream of beadpacks and cores. The domain of foam stability and the apparent foam viscosity in beadpacks was first investigated with focus on how the surface wettability of nanoparticles affects the foam generation. A variety of silica nanoparticles without any surface coating and with different coatings were tested, and the concept of hydrophilic/CO2-philic balance (HCB) was found to be very useful in designing surface coatings that provide foams with robust stability. Opaque, white CO2-in-water foams (bubble diameter < 100 µm) were generated with either polyethyleneglycol-coated silica or methylsilyl-modified silica nanoparticles with CO2 densities between 0.2 and 0.9 g/cc. The synergistic interactions at the surface of nanoparticles (bare colloidal silica) and surfactant (caprylamidopropyl betaine) in generating stable CO2 foams were also investigated. The common and distinct requirements to generate stable CO2 foams with 5-nm silica nanoparticles, in rock matrices and in fractures, were characterized by running foam generation experiments in Boise and Berea sandstone cores. The threshold shear rates for foam generation in matrix and in fracture, both in Boise and Berea sandstones, were characterized. The ability of nanoparticles to generate foams only above a threshold shear rate is advantageous, because high shear rates are associated with high permeability zones and fractures. Reducing CO2 mobility in these zones with foam diverts CO2 into lower permeability regions that still contain unswept oil.
C. Xu, Torres-Verdín, C., Yang, Q., and Diniz-Ferreira, E., “Connate water saturation – irreducible or not: The key to reliable hydraulic rock typing in reservoirs straddling multiple capillary windows (Expanded Abstract),” Society of Petroleum Engineers 2013 Annual Technical Proceedings and Exhibition. Society of Petroleum Engineers, New Orleans, LA, 2013.PDF icon PDF
C. Xu, Torres-Verdín, C., Yang, Q., and Diniz-Ferreira, E., “Connate water saturation – irreducible or not: The key to reliable hydraulic rock typing in reservoirs straddling multiple capillary windows (Expanded Abstract),” Society of Petroleum Engineers (SPE) 2013 Annual Technical Conference and Exhibition. New Orleans, LA, 2013.PDF icon PDF
C. Xu and Torres-Verdín, C., “Core-based petrophysical rock classification by pore-system orthogonality with a bimodal Gaussian density function (Expanded Abstract),” Society of Core Analysts 2013 International Symposium. Napa Valley, CA, 2013.PDF icon PDF
C. Xu and Torres-Verdín, C., “Core-based petrophysical rock classification by pore-system orthogonality with a bimodal Gaussian density function (Expanded Abstract),” Society of Core Analysts (SCA) 2013 International Symposium. Napa Valley, CA, 2013.PDF icon PDF
J. Sulzer, Duenas, J., Stampili, P., Hepp-Reymond, M. - C., Kollias, S., Seifritz, E., and Gassert, R., “Delineating the whole brain BOLD response to passive movement kinematics,” Rehabilitation Robotics (ICORR), 2013 IEEE International Conference on. IEEE, pp. 1-5, 2013.
M. R. Tucker, Moser, A., Lambercy, O., Sulzer, J., and Gassert, R., “Design of a wearable perturbator for human knee impedance estimation during gait,” Rehabilitation Robotics (ICORR), 2013 IEEE International Conference on. IEEE, pp. 1-6, 2013.
K. Yang, Celik, E., Torres-Verdín, C., and Yilmaz, A. E., “Detection and quantification of 3D hydraulic fractures with multi-component low-frequency borehole resistivity measurements (Expanded Abstract),” Society of Exploration Geophysicists 83rd Annual International Meeting. Society of Exploration Geophysicists, Houston, TX, 2013.PDF icon PDF
K. Yang, Celik, E., Torres-Verdín, C., and Yilmaz, A. E., “Detection and quantification of 3D hydraulic fractures with multi-component low-frequency borehole resistivity measurements (Expanded Abstract),” Society of Exploration Geophysicists (SEG) 83rd Ann. Internat. Mtg. Houston, TX, 2013.PDF icon PDF
A. Montaut, Sayar, P., and Torres-Verdín, C., “Detection and quantification of rock physics properties for improved hydraulic fracturing in hydrocarbon-bearing shale (Expanded Abstract),” Society of Petrophysicists and Well Log Analysts 54th Annual Logging Symposium. Society of Petrophysicists and Well Log Analysts, New Orleans, LA, 2013.PDF icon PDF
A. Montaut, Sayar, P., and Torres-Verdín, C., “Detection and quantification of rock physics properties for improved hydraulic fracturing in hydrocarbon-bearing shale (Expanded Abstract),” Society of Petrophysicists and Well Log Analysts (SPWLA) 54th Ann. Logging Symposium. New Orleans, Louisiana, 2013.PDF icon PDF
C. Xu, Torres-Verdín, C., and Gao, S., “Electrical vs hydraulic rock types in clastic reservoirs: pore-scale understanding verified with field observations in the Gulf of Mexico, U. S. (Expanded Abstract),” Society of Exploration Geophysicists 83rd Annual International Meeting. Society of Exploration Geophysicists, Houston, TX, 2013.PDF icon PDF
C. Xu, Torres-Verdín, C., and Gao, S., “Electrical vs. hydraulic rock types in clastic reservoirs: pore-scale understanding verified with field observations in the Gulf of Mexico, U.S. (Expanded Abstract),” Society of Exploration Geophysicists (SEG) 83rd Ann. Internat. Mtg. Houston, TX, 2013.PDF icon PDF
S. Misra, Torres-Verdín, C., and Sepehrnoori, K.,Environmental and transport effects on core measurements of water saturation, salinity, wettability, and hydrocarbon composition (Expanded Abstract),” Society of Petroleum Engineers 2013 Annual Technical Proceedings and Exhibition. Society of Petroleum Engineers, New Orleans, LA, 2013.PDF icon PDF
S. Misra, Torres-Verdín, C., and Sepehrnoori, K., “Environmental and transport effects on core measurements of water saturation, salinity, wettability, and hydrocarbon composition (Expanded Abstract),” Society of Petroleum Engineers (SPE) 2013 Annual Technical Conference and Exhibition. New Orleans, LA, 2013.PDF icon PDF
A. Frooqnia, Torres-Verdín, C., Sepehrnoori, K., A-Pour, R., and Mohebinia, S., “Estimation of near-wellbore relative permeability from simulation and inversion of time-lapse multiphase production logs (Expanded Abstract,” Society of Petrophysicists and Well Log Analysts 54th Ann. Logging Symposium. Society of Petrophysicists and Well Log Analysts, New Orleans, Louisiana, 2013.PDF icon PDF

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