[Investigation of ultrasonic surface wave interaction with porous saturated rocks]. Progress report, [July 1, 1993--June 30, 1994]

Technical Report · Wed Jun 01 04:00:00 EDT 1994

DOI:https://doi.org/10.2172/10157772· OSTI ID:10157772

Calculations showed that capillary forces can easily produce closed- pore boundary conditions at interface between nonwetting fluid (air) and a porous solid saturated by a wetting fluid (water). The direct excitation technique was used to measure surface wave velocity and attenuation on both wet and dry rocks. The strong correlation between the observed surface wave velocity change caused by water saturation and the formation permeability can be used for ultrasonic assessment of the dynamic permeability. The experimental system was improved further by introducing laser interferometric detection, which was adapted to surface wave inspection of fluid-saturated permeable materials. In a separate effort, the surface stiffness of different water-saturated porous solids was studied by a novel acoustical method. Areas for further study are described.

• Research Organization: Ohio State Univ. Research Foundation, Columbus, OH (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-87ER13749
• OSTI ID: 10157772
• Report Number(s): DOE/ER/13749--T2; ON: DE94013378; BR: KC0403010
• Country of Publication: United States
• Language: English

Related Subjects

440700
47 OTHER INSTRUMENTATION
AIR
ATTENUATION
GEOPHYSICAL AND METEOROLOGICAL INSTRUMENTATION
GEOPHYSICAL SURVEYS
POROUS MATERIALS
PROGRESS REPORT
ROCKS
SANDSTONES
SATURATION
ULTRASONIC WAVES
WATER SATURATION
WAVE PROPAGATION