Abstract: A composition useful for subterranean water or gas shut off applications includes organosilane-modified colloidal silica and an accelerator. The accelerator includes one or more organic or inorganic salts. A method of using a composition, including an organosilane-modified colloidal silica and an accelerator, includes forming a fluid system that is flowed to a formation in a subterranean zone, such as through a wellbore, where the composition forms a gel to plug the formation and shut off water flow into the wellbore.

Abstract: A chemical packer composition having a polyurethane foam with nanoparticles or micron-sized particles for use as an annular chemical packer in openhole horizontal wells is provided. The chemical packer composition may be used in a horizontal well having a screen (for example, a gravel pack screen) and completed using an openhole completion. The chemical packer composition may include, for example, silica nanoparticles or sand micron-sized particles. The chemical packer composition may be placed in an annulus section defined by the wellbore and the screen that traverses one or more fluid producing zones. In some instances, a portion of the chemical packer composition may be selectively removed to open a fluid producing zone to the wellbore and form plugs blocking other fluid producing zones.

Abstract: A method of treating a treatment zone in a well is provided, the method including the steps of: (A) forming a treatment fluid comprising: (i) a degradable polymer particulate; (ii) a legume particulate; and (iii) a continuous liquid phase; and (B) introducing the treatment fluid into the treatment zone of the well. The invention can be used, for example, for leak-off control or fluid diversion purposes.

Abstract: A method of treating a treatment zone in a well is provided, the method including the steps of: (A) forming a treatment fluid comprising: (i) a degradable polymer particulate; (ii) a legume particulate; and (iii) a continuous liquid phase; and (B) introducing the treatment fluid into the treatment zone of the well. The invention can be used, for example, for leak-off control or fluid diversion purposes.