EP 2788577 B1 20180228 - METHOD AND ACIDIZING TOOL FOR DEEP ACID STIMULATION USING ULTRASOUND
Title (en)
METHOD AND ACIDIZING TOOL FOR DEEP ACID STIMULATION USING ULTRASOUND
Title (de)
VERFAHREN UND ANSÄUERUNGSWERKZEUG FÜR TIEFE SÄURESTIMULATION MITTELS ULTRASCHALL
Title (fr)
PROCÉDÉ ET OUTIL D'ACIDIFICATION POUR STIMULATION PROFONDE À L'ACIDE UTILISANT DES ULTRASONS
Publication
Application
Priority
- US 201161568279 P 20111208
- US 2012068379 W 20121207
Abstract (en)
[origin: US2013146281A1] A method of deep acid stimulation for a zone to be treated in an underground formation using an acidizing tool, the method including the steps of introducing the acidizing tool into the well bore, introducing the acid formulation onto the well bore wall at the treatment zone and introducing ultrasound energy into the underground formation at the treatment zone. The subsequent acid penetration depth is deeper than the initial acid penetration depth. A method of stress fracturing a portion of an underground formation includes the steps of introducing the acidizing tool into a well bore and introducing the acid formulation and the ultrasound energy at the focused treatment point. The weakened acidized spots in combination with the stress on the underground formation causes oriented stress-induced fractures to form that are fluidly coupled with the well bore. An acidizing tool includes an acid delivery system and an ultrasonic transmitter.
IPC 8 full level
E21B 43/00 (2006.01); E21B 43/16 (2006.01); E21B 43/26 (2006.01)
CPC (source: EP US)
E21B 28/00 (2013.01 - EP US); E21B 43/003 (2013.01 - EP US); E21B 43/25 (2013.01 - EP US); E21B 43/27 (2020.05 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
US 2013146281 A1 20130613; CA 2858088 A1 20130613; CA 2858088 C 20191008; CN 104081000 A 20141001; CN 104081000 B 20170308; EP 2788577 A2 20141015; EP 2788577 B1 20180228; NO 2855231 T3 20180324; WO 2013086278 A2 20130613; WO 2013086278 A3 20140320
DOCDB simple family (application)
US 201213707781 A 20121207; CA 2858088 A 20121207; CN 201280060215 A 20121207; EP 12806782 A 20121207; NO 13725918 A 20130528; US 2012068379 W 20121207