Multiwell Experiment final report: 4, The fluvial interval of the Mesaverde Formation
The Department of Energy's Multiwell Experiment (MWX) is a field laboratory in the Piceance Basin of Colorado which has two overall objectives: to characterize the low permeability gas reservoirs in the Mesaverde Formation and to develop technology for their production. Different depositional environments have created distinctly different reservoirs in the Mesaverde, and MWX has addressed each of these in turn. This report presents a comprehensive summary of results from the fluvial interval which lies between 4400 ft and 6000 ft at the MWX site. The reservoirs consist of heterogeneous, amalgamated point-bar sequences which form broad meanderbelts which create irregular, but roughly tabular, reservoirs with widths of 1000--2500 ft. Separate sections of this report are background and summary; site descriptions and operations; geology; log analysis; core analysis; in situ stress; well testing, stimulation, fracture diagnostics, and reservoir evaluation in two separate sandstones; stress, fracture diagnostic, and stimulation experiments in an additional sandstone; supporting laboratory studies; and a bibliography. Additional detailed data, results, analyses, and data file references are presented as appendices which are included on microfiche. The results show that stimulation of fluvial reservoirs can be successful if proper care is taken to minimize damage to the natural fracture system. Both an accelerated leakoff phenomenon and the ability to alter the in situ stress were quantified. Overall, the fluvial interval offers the highest production potential of the three nonmarine intervals studied. 116 refs., 230 figs., 28 tabs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA); CER Corp., Las Vegas, NV (USA)
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 7203745
- Report Number(s):
- SAND-89-2612/Pt.B; ON: DE90007938
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
030200* -- Natural Gas-- Reserves
Geology
& Exploration
58 GEOSCIENCES
580000 -- Geosciences
BOREHOLES
CAVITIES
COMPILED DATA
DATA
DETECTION
DOCUMENT TYPES
ENGINEERING
FAILURES
FIELD TESTS
FRACTURE PROPERTIES
FRACTURES
GEOLOGIC DEPOSITS
GEOLOGY
HYDRAULIC FRACTURES
INFORMATION
MECHANICAL PROPERTIES
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NUMERICAL DATA
PERMEABILITY
PICEANCE CREEK BASIN
PROGRESS REPORT
RESERVOIR ENGINEERING
RESERVOIR ROCK
RESOURCES
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
SEISMIC DETECTION
SITE CHARACTERIZATION
STIMULATION
STRESSES
TESTING
WELL LOGGING
WELL STIMULATION