hello aspirant,

you can refer to the article where you will know many things about petroleum engineering , the exams through which you can go to australia for the studies and the companies that may recruit you there-

https://www.careers360.com/courses/petroleum-engineering-course

for any more help, you can get back to us with a new query.

also, keep surfing the net, keep collecting information from different sources and then only take a decision.

hope that helps