--> Abstract: Relationships in Heterogeneity, Measured Mechanical / Petrophysical Properties, and Visual ( core and log ) Interpretations to; #90063 (2007)
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Relationships in Heterogeneity, Measured Mechanical / Petrophysical Previous HitPropertiesNext Hit, and Visual ( core and log ) Interpretations to Assess Tight Gas Shale Reservoirs

 

Cameron, Michael S.1, S. Robert Bereskin2, George A. Waters3 (1) Devon Energy, Oklahoma City, OK (2) Bereskin and Associates, Inc, Salt Lake City, UT (3) Schlumberger Inc, Oklahoma City, OK

 

The low matrix permeability of shales (nanno-darcy scale) implies variability of reservoir quality and depends either on conductive natural fractures or the ability to create surface area through various hydraulic fracturing mechanisms. Heterogeneity being the scaling of measured values along a vertical profile (i.e. geological, petrophysical, or mechanical) can be interrelated by conducting continuous-strength measurements on a core and obtaining high resolution profiles that represent rock Previous HitpropertiesNext Hit. Anisotropy in geologic media is directly related to the scaling and the ordering of the heterogeneity. Effects of heterogeneity (vertical and horizontal) dominate the geologic Previous HitmaterialNext Hit-elastic Previous HitpropertiesNext Hit for both reservoirs and seals. Clues to this relationship are reflected in macroscopic whole core observations and in borehole image logs. With this knowledge, completion strategies based on 3 dimensional hydraulic fracture geometries, both vertically and normal to the preferred fracture plane, can be developed. Integration of the relationships to insitu stress, heterogeneity, and laboratory based petrophysical-mechanical Previous HitpropertiesNext Hit of geologic Previous HitmaterialTop will result in a greater degree of understanding for tight gas shales.

 

AAPG Search and Discover Article #90063©2007 AAPG Annual Convention, Long Beach, California