Oil and gas services: Let SGS fuel the success of your business. Whether you are involved in exploring, extracting, refining, transporting or marketing oil, gas, oil sands or other hydrocarbons, SGS offers a comprehensive range of services to support and optimize your business. United Energy Group Limited (UEG) is a leading independent exploration and production (E&P) company listed on the Hong Kong Stock Exchange. The company’s headquarter is located in Hong Kong and it has subsidiaries in China, Dubai, Egypt, Iraq and Pakistan.