Use of bacteria to break gels used in well treatment fluids

Details Use of bacteria to break gels used in well treatment fluids Use of bacteria to break gels used in well treatment fluids

1996-03-22

1999-02-09

Sayala, Chhaya D.

Chemistry: molecular biology and microbiology

Process of utilizing an enzyme or micro-organism to destroy...

Petroleum oil or shale oil treating

435266, 435277, 166246, 507201, C10G 3200

Patent

active

058693254

ABSTRACT:
A method for carrying out a well treatment in a well (e.g. fracturing, sand control, etc.) wherein a high-viscosity treatment fluid containing a gel (e.g. a polymeric gelling agent) is flowed down the well along with a bacteria selected from the generic classes of Enterococcus and Corynebacterium or a mixture of the two, which is capable of digesting and/or cleaving the gel to reduce the viscosity of the gel at the conclusion of the well treatment.

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"Breaker Concentrations Required to Improve Permeability . . . "; H.D. Brannon et al; SPE Prod. Engr.; Nov. 1992; pp. 338-42.
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"Control and Modeling of Fluid Leakoff during Hydraulic Fracturing"; G.S. Penny et al; Journal of Petr. Tech; Jun. 85; pp. 1071-81.

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