Subterranean formations
AssigneeIndependence Oilfield Chemicals LLC
InventorsKimberley Macewen, Kurt Hoeman, Jeffrey C. Dawson
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Abstract
A method of treating a subterranean formation, for example a subterranean formation susceptible to formation of a undesirable gel-like goo. The method includes contacting the formation with a fluid (A) having a polymer (PP) which includes a pendent group which includes a moiety: wherein the sulphur atom of the moiety is covalently bonded, optionally via a linking atom or group, to the backbone of the polymer.
Claims60
A method of fracturing a subterranean formation susceptible to formation of an undesirable gel-like goo, the method comprising:
- contacting the formation with a fluid comprising a friction reducer polymer that includes a pendent group which includes a moiety:
- and has a molecular weight ranging from 1,000,000 to 50,000,000 Daltons, and
- minimizing undesirable gel-like goo within the subterranean formation;
- wherein the sulphur atom of the moiety is directly covalently bonded or covalently bonded by, a linking atom or linking group to the backbone of the polymer;
- and
- wherein formation water within the subterranean formation includes Total Dissolved Solids (TDS) of at least 5000 ppm;
- and
- wherein formation rock within the subterranean formation includes rock having an Fe(II)S2-containing mineral at a level of greater than 0.1 wt % and less than 25 wt %.
A method of fracturing a subterranean formation susceptible to formation of an undesirable gel-like goo, the method comprising:
- contacting the formation with a fluid comprising a friction reducer polymer (PP) that includes a pendent group which includes a moiety:
- and has a molecular weight ranging from 1,000,000 to 50,000,000 Daltons, and
- reducing undesirable gel-like goo within the subterranean formation;
- wherein the sulphur atom of the moiety is directly covalently bonded or covalently bonded by a linking atom or linking group to the backbone of the polymer;
- and
- wherein formation water within the subterranean formation includes Total Dissolved Solids (TDS) of at least 5000 ppm;
- and
- wherein formation rock within the subterranean formation includes rock having an Fe(II)S2-containing mineral at a level of greater than 0.1wt % and less than 25 wt %.
Dependencies are inferred from the claim text.