SeisCORK Engineering Design Study
Abstract
The goal of SeisCORK is to make simultaneous and co-located seismic, pressure, temperature, pore water chemistry and pore water biology measurements in the seafloor. We want to see the small events in the vicinity of the borehole for three reasons: (1) After an event, fluid may flow in the formation in response to the changing stress regime. Down to what magnitude of event do the pressure transients in the well respond? (2) Fluid flow causes small earthquakes. One mechanism, for example, is by changing the temperature of the rocks which expand and contract, altering the stress regime. We want to look for this fluid flow. (3) Laboratory studies or rock deformation show that shear fracture is preceded by the coalescence of interacting tensile microcracks which are observed as "acoustic emissions." By placing high frequency geophones next to faults it may be possible to observe these "acoustic" precursors to rock failure.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 2006
- Accession Number
- ADA462759
Entities
People
- Ralph Stephen
- Robert Petitt Jr.
- Tom Pettigrew
Organizations
- Woods Hole Oceanographic Institution