Oilfield Chemicals Market, By Type (Inhibitors, Demulsifiers, Rheology Modifiers, Friction Reducers, Biocides, Surfactants, Foamers, and Other Products), By Application (Drilling, Production, Cementing, and Workover & Completion), By Location (Onshore and Offshore), By Geography (North America, Latin America, Europe, Asia Pacific, Middle East & Africa)