Dear Aspirant,

    I understand your concern and I am here to help you regarding your query !!

     I'm really sorry to say that, you have the fewer chances of getting admission here as the mark is low. And, based on previous years statistics, a student who secured 139 marks is able get seat in Petroleum branch as it has limited seats which are around 20 in number. So, this may get difficult if there are lots of students appearing in counselling and fo for it though.

Please refer this link below for more information and details,

http://dibru.ac.in/schools-of-studies/2014-12-25-08-59-12/dibrugarh-university-institute-of-engineering-and-technology

Hope this helps !!

All the very best wishes for your future endeavours!!