Polymer-based additives for shale stabilizations, wellbore fluid compositions comprising said additives, and methods of producing said compositions and improving shale stabilizations using said compositions
AssigneeSchlumberger Technology Corporation
InventorsDimitri Khramov, Balakrishnan Panamarathupalayam
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Abstract
Polymer-based additives improve shale stabilizations by being incorporated into wellbore fluid compositions for one or more wellbore operations or applications. Methods of producing said compositions and using said compositions to stabilize shale associated with wellbores disposed within subterranean formations are also provided. Wellbore fluid compositions comprising aqueous base fluids and the polymer-based additives and methods of introducing or circulating said compositions into the wellbores for stabilizing shales associated with the wellbores are further provided.
Claims16
A wellbore fluid composition, comprising:
- an aqueous base fluid;
- one or more polymer-based additives comprising at least one polymer-based shale stabilizer;
- and
- an amine-based shale inhibitor comprising hexamethylenediamine, bishexamethylenediamine, or a combination thereof;
- wherein a concentration of the one or more polymer-based additives is between about 0.1 wt. % and about 20.0 wt. %, calculated to a total weight of the wellbore fluid composition;
- wherein the one or more polymer-based additives comprise at least one polyvinylpyrrolidone as the at least one polymer-based shale stabilizer, wherein the at least one polyvinylpyrrolidone has a molecular weight between about 500,00 dalton and about 1,300,000 dalton;
- and
- wherein the at least one polyvinylpyrrolidone exhibits compatibility with the amine-based shale inhibitor with respect to a viscosity of the wellbore fluid composition.
Dependencies are inferred from the claim text.