Permeability of explosive-fractured-coal aquifer modeling and analysis of field hydraulic tests

Technical Report · Wed Mar 16 04:00:00 EST 1977

OSTI ID:7109248

Sherwood, A E; Quong, R; Snoeberger, D F

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

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
AQUIFERS
COAL GASIFICATION
COMMINUTION
EXPLOSIVE FRACTURING
FRACTURING
GASIFICATION
HYDROLOGY
IN-SITU GASIFICATION
IN-SITU PROCESSING
MEASURING METHODS
PERMEABILITY
PROCESSING
THERMOCHEMICAL PROCESSES