Fracture diagnostics results for the Multi-Well Experiment's paludal zone stimulation. [Piceance Creek Basin, Colorado]
A dual seismic system designed to monitor the growth of hydrofractures was fielded during the first stimulation at the DOE-sponsored Multi-Well Experiment (MWX) during December 1983. The MWX consists of three 8000-ft wells which have been drilled in low permeability gas reservoirs. The wellbores are spaced less than 200 ft apart over most of their length. With this configuration, microseismic activity created by the fracture treatment in one well could be observed with downhole geophone packages in the two adjacent wells. The responses of the two triaxial borehole seismic tools were monitored in real time and analyzed post-fracture. Upon the detection of a seismic event of known location, orientations of the tools were determined from the polarization of the compressional wave arrivals. From knowledge of the horizontal and vertical angles of incidence and an empirical estimate of seismic velocities, the location of the fracture induced seismic sources was estimated. Thus, the location of the microseisms could be estimated and, in turn, the fracture height and extent inferred. This paper presents the results of the fracture diagnostics using this borehole seismic system for the first MWX stimulation. This information is compared to and combined with the results obtained from other diagnostic techniques to provide an integrated estimate of the fracture geometry resulting from the stimulation. 15 references, 10 figures, 1 table.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5195642
- Report Number(s):
- SAND-84-0554C; CONF-8405120-3; ON: DE84008294
- Resource Relation:
- Conference: SPE/DOE/GRI gas recovery symposium, Pittsburgh, PA, USA, 13 May 1984; Other Information: Paper copy only, copy does not permit microfiche production
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fracture diagnostics results for the first Multiwell Experiment's paludal zone stimulation
Advances in borehole seismic fracture diagnostics
Related Subjects
COLORADO
NATURAL GAS DEPOSITS
SANDSTONES
HYDRAULIC FRACTURES
CRACK PROPAGATION
HYDRAULIC FRACTURING
DIAGNOSTIC TECHNIQUES
NATURAL GAS WELLS
BOREHOLES
PERMEABILITY
SEISMIC SOURCES
SEISMIC SURVEYS
WELL SPACING
WELL STIMULATION
CAVITIES
COMMINUTION
FAILURES
FEDERAL REGION VIII
FRACTURES
FRACTURING
GEOLOGIC DEPOSITS
GEOPHYSICAL SURVEYS
MINERAL RESOURCES
NORTH AMERICA
RESOURCES
ROCKS
SEDIMENTARY ROCKS
STIMULATION
SURVEYS
USA
WELLS
030900* - Natural Gas- Artificial Stimulation
Plowshare- (-1989)