WELL COLLISION AVOIDANCE USING DISTRIBUTED ACOUSTIC SENSING

Title:

WELL COLLISION AVOIDANCE USING DISTRIBUTED ACOUSTIC SENSING

Document Type and Number:

WIPO Patent Application WO/2011/047261

Kind Code:

A3

Abstract:

A method for obtaining location information about a well as it is being drilled through a subsurface, comprises: providing at least one fiber optic cable deployed in a borehole within acoustic range of the well, the proximal end of the cable being coupled to a light source and a photodetector, the fiber optic cable being acoustically coupled to the subsurface formation so as to allow acoustic signals in the subsurface to affect the physical status of the cable, providing an acoustic source in the well, transmitting at least one light pulse into the cable, receiving at the photodetector a first light signal indicative of the physical status of at least one first section of the cable. The first section is selected so that the first light signal provides information about the position of the acoustic source, and outputting at least the information to a display.

Inventors:

COLLINS CHARLES LOUIS (US)
DRIA DENNIS EDWARD (US)
FORSTER LARRY DALE (US)
GRANT LISA SHAVA (US)
RAMBOW FREDERICK HENRY KREISLER (US)

Application Number:

PCT/US2010/052842

Publication Date:

August 18, 2011

Filing Date:

October 15, 2010

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SHELL OIL CO (US)
SHELL INT RESEARCH (NL)
COLLINS CHARLES LOUIS (US)
DRIA DENNIS EDWARD (US)
FORSTER LARRY DALE (US)
GRANT LISA SHAVA (US)
RAMBOW FREDERICK HENRY KREISLER (US)

International Classes:

G01V8/16; E21B47/00; E21B47/14; G01V1/22; G01V1/28

Foreign References:

US6269198B1	2001-07-31
US7187620B2	2007-03-06
US6382332B1	2002-05-07
US20070047867A1	2007-03-01

Other References: