Onshore drilling in the region has gone up over the last 20 years. It involves driving a drilling rig deep into the earth to reach fossil fuels while an offshore drilling rig drills underneath the seabed. Other than the application of equipment, different things make the two processes stand apart from each other An offshore rig is a large structure on or in water with facilities to drill wells, to extract and process oil and natural gas, and to temporarily store product until it can be brought to shore for refining and marketing. In many cases, the platform contains facilities to house the workforce as well.