Permeability of explosive-fractured-coal aquifer modeling and analysis of field hydraulic tests
Analytical methods used to determine aquifer permeability from hydrologic tests are described, with emphasis on the postexplosion-fractured Felix No. 2 coal seam at the Hoe Creek, Wyoming site. Three perturbing effects known to influence test results are considered within the framework of a one-dimensional axisymmetric model--leakage from the overlying aquitard, two-region permeability contrast, and wellbore storage. These effects are considered in relation to three test methods--the two-well, pulse-test method, the single-well, drawdown-slope method, and the two-well, drawdown-difference method. The pulse-test and drawdown-difference methods will provide estimates of the fractured-region permeability; the drawdown-slope method will not. Estimates of permeability by the drawdown-difference method are least subject to error since estimated corrections for perturbing effects are usually small.
- Research Organization:
- California Univ., Livermore (USA). Lawrence Livermore Lab.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7109248
- Report Number(s):
- UCRL-52250
- Country of Publication:
- United States
- Language:
- English
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