Abstract: Packing fluids that include (a) an aqueous solvent, and optionally one or more water-miscible organic liquids; and (b) one or more organic cationic and/or alkali metal tungstates, molybdates, and/or silicates dissolved in the solvent are disclosed. The fluid may be substantially free of salts and esters of formic acid. The disclosure further relates to methods of making and using the packing fluids.

Abstract: A method relating to perforation operations, which comprises introducing a wettability altering fluid into a wellbore extending into a subterranean formation such that the wettability altering fluid seeps into the subterranean formation. Subsequent to introducing the wettability altering fluid, a fluid loss pill is introduced into the wellbore such that seepage of fluid between the wellbore and the subterranean formation is inhibited.

Abstract: Fluids and methods of making and using the fluids that include, for example, well bore treatment fluids, kill fluids, packer fluids, thermal insulating fluids and the like that contain soluble weighting material. The fluids include: (a) an aqueous solvent such as water, and optionally one or more water-miscible organic liquids; and (b) one or more organic cationic tungstates, molybdates, and/or silicates dissolved in the solvent. In some cases, the fluids are substantially free of lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr) salts and/or ions. The fluid may also be an oil-based emulsion including the aqueous-based fluid. Methods of making and using both the aqueous fluids and oil-based emulsions are also disclosed.

Abstract: Methods including providing a treatment fluid comprising a base fluid, a wettability altering surfactant, and a chelating agent, wherein the treatment fluid has a pH of at least about 5; introducing the treatment fluid into a subterranean formation; altering a wettability of the subterranean formation from oil-wet to either mixed-wet or water-wet with the wettability altering surfactant; and complexing metal ions in the subterranean formation with the chelating agent.

Abstract: Gellable treatment fluids containing an acrylamide copolymer and a suitable surfactant can be used in various subterranean operations where it is necessary for the treatment fluid to remain in a gelled state for extended periods of time at high formation temperatures. The surfactants are chosen to increase the relative permeability of the hydrocarbons in the subterranean formation by wettability alteration.

Abstract: A variety of methods and compositions are disclosed, including, in one embodiment, a method of treating a subterranean formation comprising: providing coated particles, wherein the coated particles comprise solid particles coated with an expandable coating; and introducing the coated particles into a permeable zone of the subterranean formation such that the coated particles form a barrier to fluid flow in the permeable zone. In another embodiment, a method of drilling a well bore may be provided, the method comprising: including coated particles in a drilling fluid, the coated particles comprising solid particles coated with an expandable coating; using a drill bit to enlarge the well bore; and circulating the drilling fluid past the drill bit.

Abstract: A method of servicing a wellbore in a subterranean formation comprising placing a composition comprising an acid and/or an acid precursor, a surfactant, and an aqueous base fluid into contact with oil-wet solids in the wellbore; wherein the acid and/or acid precursor is selected from the group consisting of acetic acid; lactic acid; glycolic acid; oxalic acid; propionic acid; butyric acid; monochloroacetic acid; dichloroacetic acid; trichloroacetic acid; hydrochloric acid; nitric acid; sulphuric acid; sulphonic acid; sulphinic acid; phosphoric acid; phosphorous acid; phosphonic acid; phosphinic acid; sulphamic acid; aliphatic polyesters; glucono-delta-lactone; glucoheptonic lactone; poly(?-caprolactones); poly(hydroxybutyrates); poly(anhydrides); aliphatic polycarbonates; poly(amino acids); polyphosphazenes; poly(ortho esters); or combinations thereof.

Abstract: Additives used in treatment fluids include particulate weighting agents comprising removable coatings which can be used in methods such as drilling and cementing operations; a method includes providing a treatment fluid for use in a subterranean formation, the treatment fluid including a coated particulate weighting agent including a core weighting agent having a first specific gravity and a removable polymer coating having a second specific gravity, the first specific gravity and the second specific gravity are not the same, introducing the treatment fluid into the subterranean formation, and allowing a portion of the removable polymer coating to be removed to alter the specific gravity of the coated particulate weighting agent down hole.