Chennai, Tamil NaduOnce oil and gas are discovered petroleum engineers work with geoscientists and other specialists to understand the geologic formation of the rock containing the reservoir They then determine the drilling methods design the drilling equipment implement the drilling plan and monitor operations Petroleum engineers help find oil and gas for the country s energy needs Petroleum engineers design and develop methods for extracting oil and gas from deposits below the Earth s surface Petroleum engineers also find new ways to extract oil and gas from older wells