1. Key Laboratory of Unconventional Oil & Gas DevelopmentChina University of Petroleum (East China) Qingdao P.R. China
2. School of Petroleum EngineeringChina University of Petroleum (East China) Qingdao P.R. China
3. Research Institute of Drilling TechnologySinopec Shengli Petroleum Engineering Co., Ltd Dongying P.R. China
4. Department of Southwest BranchSinopec Shengli Petroleum Engineering Co., Ltd DeYang P.R. China
5. College of Petroleum Engineering & GeoscienceKing Fahd University of Petroleum & Minerals, K. F. U. P. M. Dhahran Saudi Arabia