The deliverables for Phase 1 would include optimized decision tree
recommendations for stimulation procedures under various geologic scenarios.
They will be based on specific case studies that are evaluated and placed in
the context of the range of major geologic controls, and stress regimes. We
will develop a summary of the implications of the simulation programs,
indicating potential operational insights that relate to well locations,
drilling activities (if possible), and stimulation programs (where possible).
The development of this interactive decision tree will contain guidelines and
range of treatment conditions. It is meant to allow an intelligent first pass
design to be combined with secondary options based on early results from pilot
drilling. Participant guidance will be essential to outline deliverables.
Currently, the ability to estimate OGIP or OOIP often exceeds the ability
to
economically stimulate and extract this resource. This applies to many tight
as well as ultra-low permeability formations, i.e. sands or shales. Improved
simulation of hydraulic stimulation, amalgamating geologic texture with
controllable engineering parameters could be of value.
Recognizing these advances, the goals of this proposed work program are to:
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More fully enfranchise geologic regimes in the stimulation design process.
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Move the stimulation methodology planning farther upstream.
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Develop diagnostic methods that realistically reflect the geologic environments of concern. These would be methods that could be used before, during, and after hydraulic stimulation.
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Assess geologic signatures that allow more rock to be exposed to recoverable stimulation fluids, to enable fracture aperture to be maintained and to do this with minimized or optimized volumes of treating fluids.
- Scenario Selection: Select four characteristic basins where information
is
reasonably available.
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Geomodel: Develop a preliminary geomechanical model for each play, based on logging and other data.
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Sub-Seismic Fractures
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Stress Distribution
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Hydraulic Fracturing Simulations: Up to this point, a preliminary Geomodel has been developed. The next step would be simplifying the geomodel to incorporate essential features over a restricted geographic domain.
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Production Simulations: The created geometries will be weakly coupled with ARTS, the University of Utah’s reservoir simulator.
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Stress Sensitivity: Identify likely production controls associated with select characteristics.