Method and apparatus for the downhole measurement of elastic roc

Details Method and apparatus for the downhole measurement of elastic roc Method and apparatus for the downhole measurement of elastic roc

1992-05-21

1993-07-20

Eldred, J. Woodrow

Acoustics

Geophysical or subsurface exploration

Well logging

181108, 181112, 367 13, 367 30, 367 86, 73152, G01V 140

Patent

active

052295524

ABSTRACT:
A method and apparatus by which elastic properties of rock formations are determined includes a downhole logging device which has two internal accelerometers mounted within to measure the acceleration of the device. A reference displacement of the device is determined by measuring the acceleration outside the borehole while the device is suspended in air. The output of the accelerometers is measured in the borehole. Integrating the acceleration outputs of these accelerometers twice yields the displacement in the borehole. Changes in the displacement of the device are indicative of various elastic properties of formations surrounding the borehole. Using two accelerometers to determine displacement allows the continuous logging of Young's modulus and other elastic properties of rocks surrounding a well bore. In an alternate embodiment, geophones are used to measure the velocity of the device and their outputs are integrated once to yield displacement.

REFERENCES:
patent: 2244484 (1941-06-01), Beers
patent: 4480480 (1984-11-01), Scott et al.
patent: 4783742 (1988-11-01), Peters
patent: 4802144 (1989-01-01), Holzhausen et al.
patent: 4874061 (1989-10-01), Cole
patent: 4903245 (1990-02-01), Close et al.
patent: 4932003 (1990-06-01), Winbow et al.
patent: 4958125 (1990-09-01), Jardine et al.

Affiliated with

Also associated with

Rating

Method and apparatus for the downhole measurement of elastic roc does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for the downhole measurement of elastic roc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for the downhole measurement of elastic roc will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1762086