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1. (WO2005035941) METHODS OF FRACTURING A SUBTERRANEAN FORMATION USING A PH DEPENDENT FOAMED FRACTURING FLUID
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2005/035941 International Application No.: PCT/GB2004/004319
Publication Date: 21.04.2005 International Filing Date: 11.10.2004
IPC:
C09K 8/70 (2006.01)
C CHEMISTRY; METALLURGY
09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
K
MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
8
Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
60
Compositions for stimulating production by acting on the underground formation
62
Compositions for forming crevices or fractures
70
characterised by their form or by the form of their components, e.g. foams
Applicants: CHATTERJI, Jiten[US/US]; US (UsOnly)
KING, Karen, L.[US/US]; US (UsOnly)
KING, Bobby, L.[US/US]; US (UsOnly)
SLABAUGH, Billy, F.[US/US]; US (UsOnly)
HALLIBURTON ENERGY SERVICES, INC.[US/US]; PO Box 1431 Duncan, OK 73533, US (AllExceptUS)
WAIN, Christopher, Paul[GB/GB]; GB (MW)
Inventors: CHATTERJI, Jiten; US
KING, Karen, L.; US
KING, Bobby, L.; US
SLABAUGH, Billy, F.; US
Agent: WAIN, Christopher, Paul ; AA Thornton & Co 235 High Holbon London WC1V 7LE, GB
Priority Data:
10/683,64410.10.2003US
Title (EN) METHODS OF FRACTURING A SUBTERRANEAN FORMATION USING A PH DEPENDENT FOAMED FRACTURING FLUID
(FR) PROCEDES DE FRACTURATION D'UNE FORMATION SOUTERRAINE A L'AIDE D'UN FLUIDE DE FRACTURATION MOUSSANT EN FONCTION DU PH
Abstract:
(EN) Methods of fi-acturing a subterranean formation include providing a ftacturing fluid having a first pH. The fracturing fluid may be made by combining a gelling agent, a surfactant, and a proppant. The surfactant is capable of facilitating foaming of the fracturing fluid at the first pH and defoarning of the fi-acturing fluid when its pH is changed to a second pH. The methods of fracturing the subterranean formation further include foaming the fracturing fluid having the first pH and subsequently purnping it to the subterranean formation to fracture the formation. The pH of the fracturing fluid changes to a second pH, for example via in situ contact with an acidic material, causing the level of foam in the fracturing fluid to be reduced. As a result of the reduction of the foam, the fracturing fluid deposits the proppant into the fractures formed in the subterranean formation.
(FR) Procédé de fracturation d'une formation souterraine qui consiste à utiliser un fluide de fracturation ayant un premier pH. Le fluide de fracturation peut être obtenu par combinaison d'un agent gélifiant, d'un tensioactif et d'un agent de soutènement. Le tensioactif est capable de faciliter le moussage du fluide de fracturation au premier pH et le démoussage du fluide de fracturation lorsque le pH est modifié à une seconde valeur. Le procédé selon la présente invention consiste en outre à faire mousser le fluide fracturation ayant le premier pH, puis à pomper ledit fluide dans la formation souterraine pour fracturer ladite formation. Le pH du fluide de fracturation se modifie à un second pH, par exemple via le contact en situ avec un matériau acide, ce qui entraîne une réduction du niveau de mousse dans le fluide de fracturation. En conséquence de la réduction de la mousse, le fluide de fracturation dépose l'agent de soutènement dans les fractures formées dans la formation souterraine.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LU, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)