Correction to: Scientific Reports https://doi.org/10.1038/s41598-017-01996-7, published online 12 May 2017

In the original version of this Article, Affiliations 1 and 2 were not listed in the correct order. The correct affiliations are listed below:

Affiliation 1

State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum-Beijing, 102249, China

Affiliation 2

College of Geosciences, China University of Petroleum-Beijing, 102249, China

This error has now been corrected in the PDF and HTML versions of the Article, and in the accompanying Supplementary Table file.