Method and means for determining the subsurface position of...

Details Method and means for determining the subsurface position of... Method and means for determining the subsurface position of...

G - Physics

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G01S 5/18 (2006.01) E21B 47/02 (2006.01) E21B 47/10 (2006.01) G01S 5/28 (2006.01) G01V 1/42 (2006.01) G01V 1/52 (2006.01)

Patent

CA 1235471

A B S T R A C T METHOD AND MEANS FOR DETERMINING THE SUBSURFACE POSITION OF A BLOWING WELL WITH RESPECT TO A RELIEF WELL The subsurface position of a blowing well with respect to an adjacent relief well is determined by detecting at a plurality of axially and tangentially spaced locations in the relief well acoustic waves emanating from a subsurface loca- tion in the blowing well. The distance between the wells is calculated on the basis of the difference in times of arrival of the waves at said axially spaced locations. The radial direction of the blowing well relative to the relief well is determined by measuring the acoustic intensity resulting from the waves at each of said tangentially spaced locations.

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