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1. WO1996004349 - WATER-BASED DRILLING FLUID

Publication Number WO/1996/004349
Publication Date 15.02.1996
International Application No. PCT/US1995/009465
International Filing Date 25.07.1995
Chapter 2 Demand Filed 05.02.1996
IPC
C09K 8/04 2006.01
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
02Well-drilling compositions
04Aqueous well-drilling compositions
C09K 8/60 2006.01
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
60Compositions for stimulating production by acting on the underground formation
C09K 8/84 2006.01
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
60Compositions for stimulating production by acting on the underground formation
84Compositions based on water or polar solvents
CPC
C09K 8/04
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
02Well-drilling compositions
04Aqueous well-drilling compositions
C09K 8/607
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
60Compositions for stimulating production by acting on the underground formation
607specially adapted for clay formations
C09K 8/845
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
60Compositions for stimulating production by acting on the underground formation
84Compositions based on water or polar solvents
845containing inorganic compounds
Applicants
  • BAROID TECHNOLOGY, INC. [US/US]; 3000 N. Sam Houston Parkway East Houston, TX 77032, US
Inventors
  • MODY, Fersheed, K.; US
  • FISK, James, V., Jr.; US
Agents
  • JOHNSON, William, E., Jr.; Browning, Bushman, Anderson & Brookhart Suite 1800 5718 Westheimer Houston, TX 77057, US
Priority Data
08/286,04204.08.1994US
08/490,78217.07.1995US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) WATER-BASED DRILLING FLUID
(FR) FLUIDE DE FORAGE A BASE D'EAU
Abstract
(EN)
A water-based drilling fluid for use in shale formations having a given average pore size has solutes dissolved therein sized so as to allow the pores of the shale formations to at least partially restrict the solutes. For purposes of enhancing the restriction of the solutes by the shale pores, the dissolved solutes may have different radii. Additional solutes, preferably lower molecular weight salts, are dissolved in the drilling fluid to lower the activity of the water in the water-based drilling fluid. The same combination of additives, a first additive of dissolved molecular solutes sized to at least partially block a shale pore space and a second additive of dissolved molecular solutes selected to lower the water activity, are combined in a water-based carrier fluid and used in earth boreholes surrounded by shale formations as either a spotting fluid, or as a lubricant, or as a shale formation strengthener or as a completion fluid.
(FR)
Fluide de forage à base d'eau destiné à être utilisé dans des formations d'argile litée ayant une taille moyenne donnée des pores, qui comporte des solutés d'une taille telle qu'ils permettent aux pores de l'argile litée de retenir au moins partiellement lesdits solutés. Afin d'améliorer la rétention des solutés par les pores de l'argile litée, lesdits solutés peuvent avoir différents rayons. Des solutés supplémentaires, de préférence des sels à poids moléculaire faible, sont dissous dans le fluide de forage pour affaiblir l'activité de l'eau contenue dans le fluide de forage à base d'eau. Les mêmes additifs, un premier additif de solutés moléculaires d'une taille destinée à bloquer au moins partiellement l'espace occupé par un pore d'argile litée et un second additif de solutés moléculaires sélectionnés pour affaiblir l'activité de l'eau, sont combinés dans un liquide porteur à base d'eau et utilisés dans des trous de forage entourés par des formations d'argile litée soit comme fluide de spotting, soit comme lubrifiant, soit comme renforçateur d'argile litée, soit encore comme fluide de complétion.
Also published as
Latest bibliographic data on file with the International Bureau