Drilling fluids and additives therefor

Details Drilling fluids and additives therefor Drilling fluids and additives therefor

1999-03-31

2000-10-17

Warden, Jill

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

507211, 507212, 507213, 507110, 507111, E21B 3302, C09K 702

Patent

active

061332038

ABSTRACT:
A process and composition are provided for permeability reduction in a hydrocarbon-bearing formation to improve hydrocarbon recovery therefrom. A moderately epichlorohydrin cross-linked, non-hydroxylpropylated starch is derived from high amylopectin waxy maize starch for use in drilling, workover and completion fluids. The starch is combined with xanthan gum and used in solutions of fresh water, non-saturated brine or saturated brine containing sized salt particles, typically sodium chloride, of various sizes, or sized calcium carbonate, or a combination of sized salt and sized calcium carbonate.

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