1. China University of Petroleum (East China), Huangdao District, Qingdao City, 266580 Shandong Province, China
2. Department of Petroleum Engineering, NED University of Engineering and Technology, Karachi 75270, Pakistan
3. State Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, China
4. MOL Pakistan Oil and Gas Company Ltd. B.V. Islamabad 75400, Pakistan