Under the deal with Chevron Corp., the U.S.'s second-largest oil firm, Hyundai Heavy will deliver the modules by October 2013, the company said in a regulatory filing.
Shares of Hyundai Heavy were trading at 191,500 won on the Seoul bourse as of 2:30 p.m., up 0.26 percent.
The deal came amid concerns that a dry spell for the shipbuilding industry could last longer than expected. New shipbuilding orders have fallen sharply, in line with the global economic downturn triggered by the financial crisis in October last year.
The LNG-processing facility will be built in seas around Barrow Island, off the coast of western Australia, it said.
Chevron and its business partner Exxon Mobil Corp. are seeking to launch the Gorgon LNG project in seas off Australia's northwest coast. Chevron is operator and owns 50 percent of the project.
The project is expected to cost $37 billion in the first phase of development, with first gas planned for 2014, Hyundai Heavy said.

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