Multiwell Experiment final report: 4, The fluvial interval of the Mesaverde Formation

Technical Report · Mon Jan 01 00:00:00 EST 1990

OSTI ID:6978282

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 600 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. 141 refs., 92 figs., 33 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: 6978282
• Report Number(s): SAND-2612/Pt.A; ON: DE90007948
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
58 GEOSCIENCES
PICEANCE CREEK BASIN
NATURAL GAS DEPOSITS
RESERVOIR ROCK
EVALUATION
SANDSTONES
ENHANCED RECOVERY
GEOLOGIC FRACTURES
GEOLOGY
GEOPHYSICAL SURVEYS
LITHOLOGY
MORPHOLOGY
NATURAL GAS
NATURAL GAS WELLS
PERMEABILITY
PROGRESS REPORT
SITE CHARACTERIZATION
WELL DRILLING
WELL LOGGING
WELL STIMULATION
DOCUMENT TYPES
DRILLING
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
MINERAL RESOURCES
RECOVERY
RESOURCES
ROCKS
SEDIMENTARY ROCKS
STIMULATION
SURVEYS
WELLS
030200* - Natural Gas- Reserves
Geology
& Exploration
580000 - Geosciences