Hi yash, Considering your rank you there is a fair chance that you can get into some lower branches in both upes and PDPU. You can wait for last round to upgrade your branches as high possibilities are there. So don't missout the registration process. Do participate in the counselling. UPES also take its entrance exam it has major portion of intake so i will suggest you to give that exam too if you are here in UPES for petroleum engineering :)

hope it will help you. FOR MORE QUERY COMMENT BELOW AND UPVOTE :)