Global Oilfield Production Chemicals Market By Type (Demulsifiers, Corrosion Inhibitors, Paraffin Inhibitors, Biocides, Hydrate Inhibitors, H2S Scavengers, Scale Inhibitors, Others), By Application (Oil and Gas, Shale Gas), By Region and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2019–2028