There is a saying in oil and gas exploration — Big fields get bigger.

That maxim has held true for Alaska’s BP-operated giant Prudhoe Bay, where more than 40 years after first oil the UK supermajor and its partners continue to turn over new chapters at what remains the most productive US oilfield in history.

Those horizons include pioneering enhanced oil recovery techniques, consistent well work and an increasing focus on natural gas liquids, as well as potential gas sales through a proposed liquefied natural gas project.