Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent
1990-12-26
1992-06-09
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Well logging
367 69, 181105, 73151, G01V 140
Patent
active
051213630
ABSTRACT:
A method and apparatus by which fractured rock formations are identified and their orientation may be determined includes two orthogonal motion sensors which are used in conjunction with a downhole orbital vibrator. The downhole vibrator includes a device for orienting the sensors. The output of the sensors is displayed as a lissajou figure. The shape of the figure changes when a subsurface fracture is encountered in the borehole. The apparatus and method identifies fractures rock formations and enables the azimuthal orientation of the fractures to be determined.
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Spencer et al; "Thin Layer Fracture Density"; 60th Annu. SEG Int. Mtg., Sep. 27, 1990, v2, pp. 1386-1387; abst only provided.
Lacy et al; "Fracture Azimuth and Geometry Determination"; SPE, vol. 12, pp. 341-356, 1989; abst only.
Conoco Inc.
Moskowitz Nelson
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