1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China
2. Qiangtang Basin Research Institute, Southwest Petroleum University, Chengdu 610500, China
3. Exploration and Development Research Institute, PetroChina Southwest Oil & Gasfield Company, Chengdu 610051, China
4. Department of Geological Sciences, 316 Clippinger Laboratories, Ohio University, Athens, OH 45701, USA
5. Research Institute, CNPC Bureau of Geophysical Prospecting, Zhuozhou 052750, China