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Production Study Group
Economic Optimization of Horizontal Wells in Unconventional Reservoirs
Speaker: Robert D. Barree, Ph.D., P. E., Preseident at Barree & Associates
Date: Monday, November 18th, 2013
Location: Halliburton, 1125 17th St, Suite 1900, Denver
RSVP: by Friday, November 15th, Wendell Salas @ Wendell.Salas@halliburton.com
Abstract: Extrapolation of conventional paradigms to unconventional reservoirs can lead to disappointment and poor performance. Careful analysis of the reservoir and application of the correct stimulation design is critical when dealing with marginally economic developments. This includes adequate characterization of the reservoir and an understanding of the factors that control flow capacity and deliverability.
One of the biggest practical problems with unconventional stimulation design optimization is estimating post-frac rate, production decline and ultimate recovery. Without a realistic prediction of the decline resulting from a given completion it is impossible to assign value to one design over another and equally impossible to optimize the treatment for whichever goal is sought, either acceleration of recovery or increase in reserves.
It is often the first – inadequate reservoir characterization – that leads to the second – unrealistic post-treatment predictions. For instance, assuming core-derived permeability fully represents the reservoir’s total flow capacity or that stimulated reservoir volumes represent the effective producing volumes, can lead to incorrect diagnosis of the reservoir capability and consequently, lead to an inefficient treatment design.
This talk presents methods for production forecasting that give reasonable post-treatment predictions that have been found useful for economic planning. The proposed methodology, backed by field observations and laboratory work, provides an economically viable plan for optimizing lateral length, fracture spacing, and treatment design.
Robert D. Barree is president and principal investigator of Barree & Associates, a consulting firm specializing in stimulation and well performance optimization. He has been involved in the development of hydraulic fracture technology since 1980 and is the primary author of the fully three-dimensional hydraulic fracture simulator GOHFER. Dr. Barree is also the author of more than fifty technical publications and has served as SPE Distinguished Lecturer on the topic of new philosophies in hydraulic fracturing. He is a registered Professional Engineer and holds a B.S. degree in Petroleum Engineering from the Pennsylvania State University and Ph.D. from Colorado School of Mines.