Experimental Investigation of Coupled Processes Effects on Fracture Network in Enhaced Geothermal Systems
As the geothermal fluid circulates between the injection and production wells through existing or man-made fractures, it interacts with the reservoir rock, and triggers coupled Thermal-Hydro-Mechanical-Chemical (THMC) processes that impact reservoir dynamics and productivity. Change in fracture aperture and permeability due to coupled processes caused by fluid injection/extraction operations could significantly affect the EGS production success. We are conducting laboratory experiments on fractured granite specimens at reservoir conditions to investigate how the coupled processes affect the fracture aperture and permeability evolution at EGS reservoir, and to improve the predictive capability of existing models using well-constrained experimental laboratory data.
Caulk, R., Ghazanfari, E., Perdrial, J., Perdrial, N. (2016). "Experimental Investigation of Fracture Aperture and Permeability Change within Enhanced Geothermal Systems". Journal of Geothermics, 62 (2016) 12–21
Energy Pile Performance Evaluation using COMSOLThe performance of energy piles remains a key area of research. The initial geothermal energy pile design controls the heat transfer and thermal stresses associated with the thermal soil-structure interaction for the lifespan of the foundation. We are using numerical modeling (COMSOL) calibrated with field data to gain more insight into long-term thermal storage and stress mobilization within active energy piles.
Caulk, R., McCartney, J., Ghazanfari, E. (2014), "Calibration of a Geothermal Energy Pile Model", COMSOL Conference, Boston, MA, 2014
Geomechanical Characterization of Marcellus ShaleWe are conducting laboratory experiments on Marcellus shale specimens to investigate the geo-mechanical effects on short-term (i.e. effect on fracturing mechanism) and long-term (i.e. effect on transport properties and production) behavior of these formations. Elasto-plastic, yielding, failure, and anisotropy evolution response of Marcellus shale specimens are investigated as a function of pressure, temperature, and bedding angle through a series of hydrostatic and triaxial experiments (single and multi-stage) using high pressure/temperature servo controlled trixial system (Autolab 1500). Additional characterization includes mineralogy, porosity, and fabric through thin section and X-Ray CT imaging technique.
Villamor, R., Ghazanfari, E., Asanza, E. (2016) "Geomechanical Characterization of Marcellus Shale". Journal of Rock Mechanics and Rock Engineering, DOI 10.1007/s00603-016-0955-7
Villamor Lora, R., Ghazanfari, E. (2014), "Geomechanical Characterization of Shale Formations for Sustainable Production", ASCE Shale Energy Engineering Conference, Pittsburgh, PA, 2014
Application of Electrokinetics in Subsurface EnergyElectrically Enhanced Oil Recovery (EEOR) is a new technique that has great potential in resource recovery specifically in heavy oil reservoirs. We are conducting laboratory investigation on natural and synthetic cores o understand the effect of petro-physical characteristics of formation (i.e., pore structure, constitutive relationships) on flow characteristics and important parameters affecting oil recovery in clay rich formations using state of the art tools. We are also developing a mathematical model to predict the two-phase flow under applied hydraulic and electric gradients based on the petro-physical properties of the formation and the physical/chemical properties of the crude oil.
Peraki, M., Ghazanfari, E., Pinder, G.F., Harrington, T.L. (2016) "Electrodialysis: An Application for the Environmental Protection in Shale-gas Extraction". Journal of Separation and Purification, Vol. 161, pp 96–103
Peraki, M., Ghazanfari, E. (2014), "Electrodialysis Treatment of Flow-back Water for Environmental Protection in Shale Gas Development", ASCE Shale Energy Eng. Conference, Pittsburgh, PA, 2014
Reliability of Stiffness Measurement in Intelligent CompactionWe are identifying the field Quality Assurance (QA) techniques currently available for intelligent compaction to establish QA parameters, evaluating the degree of uncertainty associated with IC measurement values using available data and laboratory experiments, and identifying test sections in collaboration with Vermont Agency of Transportation to conduct IC techniques.
Stiffness Characterization of
Extraterrestrial Regolith using Geophysical Techniques
investigating the suitability of the existing geophysical methods for
stiffness characterization of extraterrestrial regolith and performing
necessary modifications for adaptation of these techniques.
Last modified November 09 2016 02:10 PM