1. SLB Beijing Geoscience Center, Beijing, P.R. China
2. PetroChina Chongqing Shale Gas Exploration and Development Co., Ltd., Chongqing, P.R. China
3. SLB China Services, Chengdu, Sichuan, P.R. China
4. CNPC, Oman Exploration and Development Department, Muscat, Oman