In the first year, most of the colleges offer the same courses so you can expect subjects which are fundamental to all departments. Now to be specific about Petroleum engineering This is the subjects:

Geology for Petroleum Engineering,  drilling fluids and cement, Drilling technologies, Surveying, Petroleum production And many subjects with specialization in this. On a short note, You can think of studying subjects related to Geology, Chemistry, Physics. With a very specific part in this Big domains.