First of all you need to look for images that or news that talk about oil.then collect all the pics and make a collage by sticking can put some pictures on a chart paper and also hang it in our classroom.But when you make the chart mke sure you write down some very crucial points,such as the importance of oil and oil resources,you can also put up a map showing the various oil reserves in our country.Write down some points regarding the exploitation also,but make sure you don't make your chart or collage too lengthty or even too boring.
All the bestt..hope tiz helps u..if it does plzz mark it besttttt..!