SYNTHETIC HYDRATABLE POLYMERS FOR USE IN FRACTURING FLUIDS AND METHODS FOR MAKING AND USING SAME

摘要

Downhole fluid compositions including a base fluid and an effective amount of a synthetic hydratable polymer system including a hydrophobically modified, cross-linked polyacrylate polymer, a hydrophilic, anionic, high molecular weight, cross-linked polyacrylic acid polymer, or mixtures and combinations thereof, where the effective amount is sufficient to achieve a desired viscosity profile and a desired breaking profile in the present of a breaking system in the absence of natural hydratable polymers.

主权项

1. A synthetic polymer composition comprising:
a major amount of synthetic hydratable polymers, and a minor amount of natural hydratable polymers, where the synthetic hydratable polymers are selected from the group consisting of (a) high molecular weight homo- and/or copolymers of acrylic acid crosslinked with polyalkenyl polyethers, (b) high molecular weight hydrophobically modified, cross-linked polyacrylate polymers, (c) hydrophilic, anionic, high molecular weight, cross-linked polyacrylic acid polymers, and (d) mixtures or combinations thereof, where the natural hydratable polymers are selected from the group consisting of polysaccharides, polyacrylamides, polyacrylamide copolymers, and mixtures or combinations thereof, where the polymer composition builds viscosity after being combined with an aqueous base fluid, where the polymer composition breaks using one breaker or a plurality of breakers, where the major amount is between 80 wt. % up to 100 wt. % and where the minor amount is between 0 wt. % and 20 wt. %.