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1. (WO2003056131) METHOD AND APPARATUS FOR PLACEMENT OF MULTIPLE FRACTURES IN OPEN HOLE WELLS

Pub. No.:    WO/2003/056131    International Application No.:    PCT/EP2002/014743
Publication Date: Fri Jul 11 01:59:59 CEST 2003 International Filing Date: Tue Dec 24 00:59:59 CET 2002
IPC: E21B 43/26
Applicants: SOFITECH N.V.
SCHLUMBERGER CANADA LIMITED
SERVICES PETROLIERS SCHLUMBERGER
SCHLUMBERGER TECHNOLOGY B.V.
SCHLUMBERGER HOLDINGS LIMITED
Inventors: WENG, Xiaowei
BROWN, J., Ernest
BONEY, Curtis, L.
Title: METHOD AND APPARATUS FOR PLACEMENT OF MULTIPLE FRACTURES IN OPEN HOLE WELLS
Abstract:
A method and apparatus is provided for created multiple fractures (26) in a subterranean formation with a single, continuous treatment operation. A plurality of burst disk assemblies (20) are included, each having an independent burts pressure and corresponding to a specific interval to be treated, whereby the assemblies are arranged on a work or completion string (28) such that the assembly with the lowest burst pressure is positioned at the toe, or lowest position, and subsequent assemblies have increasing burst pressures toward the heel of the string. As fluid is pumped down the string, pressure builds up to exceed the burst pressure of the first disk, allowing treatment fluid to contact the formation. Once a first interval treated or fractured, it may be isolated thereby allowing pressure to again build up in the string and burst subsequent disks.