Boots – shoes – and leggings
Patent
1990-09-19
1993-09-07
Envall, Jr., Roy N.
Boots, shoes, and leggings
G01V 300
Patent
active
052435210
ABSTRACT:
The present invention is directed to utilizing data indicative of formation resistivity and calculating the width and depth of a fracture therefrom. In the preferred embodiment, the present invention employs data acquired from a formation microscanner tool. Potential fracture locations are detected for acquired formation microscanner tool data preferably by taking into account the relatively slowly varying conductivity changes in the rock matrix, and separating them out from the high and narrow peaks generated by fractures. Each potential fracture location can be depicted as current from the formation microscanner tool versus azimuth, wherein the current measured by the formation microscanner tool is essentially flat for the formation but peaked for potential fracture locations. I have found that the area under the peak, herein referred to as "additional area under the curve, A", is related to the width of each potential fracture location according to the following equation, based on the specific tool parameters:
REFERENCES:
patent: 4575828 (1986-03-01), Williams
patent: 4641724 (1987-02-01), Chow et al.
patent: 4791619 (1988-12-01), Liu
S. Crary, et al., Fracture Detection with Logs, The Technical Review, Jan. 1987, pp. 22-34.
Envall Jr. Roy N.
Huntley David
Pojunas Leonard W.
Schlumberger Technology Corporation
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