the khurais field is the largest such project ever, and the challenges involved were staggering. >> khuraisnted a technological challenge. the field has very little natural pressure, which is necessary to bring the oil to the surface. so to force the oil up, they're injecting seawater down deep underground. >> we will inject about 84 million of gallon per day of seawater. >> so where is the seawater coming from? 'cause we're here in the middle of a desert. how far away is the sea? >> it is about 150 miles from here. >> so in addition to all of this for the oil, you're also building a pipeline from the-- >> a pipeline to get the additional water all the way to here. >> the complexity and vastness of the project are staggering with 26 contractors, 106 subcontractors, and 22,000 workers from around the world who have laid thousands of miles of pipeline and cables. how much steel are you using here? 'cause i'm looking. it's just steel as far as i can see. >> see, we have enough structured steel here that will build two bridges equal in size of the golden gate bridges in california. >> two? >> t