Prof. Maurice Dusseault, Ph.D., P.Eng., Professor of Geological Engineering Department of Earth and Environmental Sciences, University of Waterloo, Canada, will speak on Thursday, August 19, 2021 at 9 AM Central Time.
Abstract
M. King Hubbert noted the importance of in situ stresses in hydraulic stimulation over 60 years ago, and his conclusion that in situ stress is the primary factor in hydraulic stimulation and induced fracture propagation remains valid. In situ stresses govern the placement of dikes and sills in volcanic and igneous processes, and the eruptive growth of continental spreading centers, such as the one that bisects Iceland, is understandable only in terms of hydraulic fracturing and in situ stresses. The presentation will touch briefly upon several hydraulic stimulation subjects related to the orientation and distribution of in situ stresses.
Knowledge of the in situ stress state constitutes one of most important inputs to the design of stimulation activity and understanding of paleostresses helps geotectonic experts deconvolve the past. However, when we do stimulation, we must also acknowledge the importance of natural rock mass fabric (joints, natural fractures…), especially in rocks that are inherently stiff and strong. We must acknowledge the importance of hydraulics and fluid flow as well. These all interact and affect stimulation activities. Understanding the interactions will improve your outcomes in the field.
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Maurice is a Professional Engineer and Professor of Geological Engineering at the University of Waterloo, where he has taught and carried out geomechanics research since 1982. His research focuses on deep subsurface engineering issues including oil production, hydraulic stimulation, energy storage, geothermal energy, carbon sequestration, and deep injection disposal of granular solids and liquid wastes. He holds over 90 international patents and has about 600 full-text papers published in journals and conferences. Maurice is a well-known educator and consultant, an advisor to companies and governments on matters relating to energy development, hydraulic stimulation, energy geostorage, wellbore integrity, technology, and innovation. Maurice is deeply interested in energy technologies that scale to community levels to provide robust and reliable heat and power. These include integrating natural gas, hydrogen, compressed air energy storage, and heat geo-storage.
Another important component of his research is environmental geomechanics: safe and permanent sequestration of carbon (CO2, petcoke, biosolids…), particulate solid slurries, and waste fluids through injection deep into sedimentary strata. Maurice is also an entrepreneur, having started six companies over the years, most still in existence, and of course struggling to make headway in difficult conditions.