Drilling & Completion; How deep can the industry go? But for oil and gas well drilling, operators have concerns other than water depth. To ensure that wells actually reach their intended targets requires formation evaluation, and therein lies a challenge. Aker BP drilling again on North Sea Liatårnet discovery. Drilling wells is one of the most important activities in the process of finding hydrocarbon reservoirs and producing oil and gas from these reservoirs to me. Scientific Deep Sea Drilling and Currently, drilling for oil and gas is routine in all offshore environments, with major deep-water (>200 m) production in areas such as the Arctic, northern North Atlantic Ocean (UK and Norwegian waters), East and West Africa, Gulf of Mexico, South America, India, Southeast Asia, and Australia (Figure 1). Ultra-deep-water (>1000 m) production is still in its early stages and is likely to increase in the coming years, with the most active development in the Gulf of Mexico, where major