Hii Praveen,

I personally don't recommend to pursue Petroleum engineering as your Bachelor's degree. Always pursue your bachelor's degree in core sector, so that you can have strong back up.

It is better to chose such courses at Master's level.If you pursue your degree in mechanical, chemical, civil or any other core branch, the basic fundamentals will remain same. As petroleum engineering is applied branch, fundamentals from your bachelor will be useful. Anyone can enter in Petroleum engineering but vice versa may not be possible.

ALL THE BEST!!