1. Institute of Sedimentary GeologyChengdu University of Technology Chengdu 610059 China
2. Exploration & Development Research Institute of PetroChina Changqing Oilfield Company Xi'an 710018 China
3. National Engineering Laboratory for Exploration and Development of Low Permeability Oil & Gas Fields Xi'an 710018 China
4. Key Laboratory of Nuclear Resource and Environment (Ministry of Education)East China University of Technology Nanchang 330013 China
5. Production Logging CenterChina Petroleum Logging Co. Xi'an 710200 China