Royal Dutch Shell PLC says it has a way to spend less on tapping remote natural-gas fields. There’s just one catch: It will cost at least $10 billion, according to people who have worked on the project. Shipyard workers in South Korea are building a hull for the Anglo-Dutch company that stretches more than 1,600 feet from bow to stern. The boat will drop anchor in a natural-gas field, chill the gas into liquid and pump it into tankers. The vessel, christened Prelude, will produce enough natural gas to supply Hong Kong for a year, according to Shell. The company says the giant project will help Shell develop gas fields that are too small or far-flung to justify the pricey pipelines and onshore processing plants needed for offshore gas fields. Shell hasn’t announced a completion date for Prelude, now a bright red hull afloat in the shipyard, but it […]