Clay control additive for wellbore fluids

Details Clay control additive for wellbore fluids Clay control additive for wellbore fluids

2006-06-23

2010-06-22

Bates, Zakiya W (Department: 3676)

Wells

Processes

Placing fluid into the formation

C166S300000

Reexamination Certificate

active

07740071

ABSTRACT:
A clay stabilizer which is capable of inhibiting swelling in a wide variety of clay types and is also capable of restoring permeability in formations which have previously been damaged by clay swelling. Amine salts of differing molecular weights configurations and ionic strength are combined to provide transport into micropores, mesopores and macropores in the formation and to effect cationic change therein. A poly quaternary amine having a high to very high charge density is added along with lower molecular weight amine salts to substantially permanently exchange cations with the clay in the formation.

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patent: WO 0118147 (2001-03-01), None
Schlemmer et al.;“Progression of water-based fluids based on amine chemistry—Can the road lead to true oil mud replacements?”, 2003 American Association of Drilling Engineers Technical Conference Paper AADE-03-NTCE-36.

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