Tube-wave seismic imaging

Details Tube-wave seismic imaging Tube-wave seismic imaging

2007-10-30

2009-10-13

Keith, Jack W. (Department: 3663)

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Well logging

C367S025000, C367S057000

Reexamination Certificate

active

07602669

ABSTRACT:
The detailed analysis of cross well seismic data for a gas reservoir in Texas revealed two newly detected seismic wave effects, recorded approximately 2000 feet above the reservoir. A tube-wave (150) is initiated in a source well (110) by a source (111), travels in the source well (110), is coupled to a geological feature (140), propagates (151) through the geological feature (140), is coupled back to a tube-wave (152) at a receiver well (120), and is and received by receiver(s) (121) in either the same (110) or a different receiving well (120). The tube-wave has been shown to be extremely sensitive to changes in reservoir characteristics. Tube-waves appear to couple most effectively to reservoirs where the well casing is perforated, allowing direct fluid contact from the interior of a well case to the reservoir.

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