1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum-Beijing, Beijing 102249, China
2. Modeling and Imaging Laboratory, Earth and Planetary Sciences, University of California, Santa Cruz, CA 95064, USA
3. National Center for Computational Sciences, Oak Ridge National Laboratory, One Bethel Valley Road, Oak Ridge, TN 37831-6008, USA. E-mail: chenyk2016@gmail.com