Method for enhancing the compatibility of a zinc-brine completio

Details Method for enhancing the compatibility of a zinc-brine completio Method for enhancing the compatibility of a zinc-brine completio

1998-05-19

2000-10-31

Bagnell, David

Wells

Processes

With indicating, testing, measuring or locating

166308, 166271, E21B 4326

Patent

active

06138755&

ABSTRACT:
In a method for enhancing the compatibility of a zinc-brine completion fluid with a fracturing fluid, test samples of selected completion fluids are combined with test samples of selected fracturing fluids to form an admixture. The parameters of incompatibility between the completion fluid and the fracturing fluid are analyzed and identified. The parameters or indicia of incompatibility identified can be precipitation, emulsification and/or an increase in viscosity. The zinc brine completion fluid is then blended with additives to remove these parameters of incompatibility. The additives can be selected from a group comprising hydrochloric acid, hydrobromic acid, acetate salts, citrate salts, and surfactants. At the well site, the altered zinc brine completion fluid is pumped in to displace drilling fluids in the wellbore before pumping in fracturing fluid. Additional altered brine completion can follow the fracturing fluid into the wellbore. Commingling of the altered zinc brine completion fluid with fracturing fluid in the wellbore or the formation can occur without substantial damage to the formation.

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