BP completed its Thunder Horse South expansion project, which is expected to boost production by a gross 50,000 BOE/D at the deepwater Thunder Horse field in the US Gulf of Mexico. A subsea production system was added two miles south of the Thunder Horse platform, and two 11,000-ft seabed flowlines were installed to tie the system into the platform. By using proven, standardized equipment and technology instead of building custom components, BP was able to bring in the project USD 150 million under budget and 11 months early, the company said. BP is the field operator with a 75% interest. ExxonMobil holds the remaining interest.