IMAGE SOURCE: GETTY IMAGES.As oil prices continue to hover around $50 per barrel, it seems that all the news these days revolves around acquisitions and divestments of oil assets. Sometimes, though, it simply makes more sense to try to extend the life of the assets you already own. Marathon Oil (NYSE: MRO), which has been heavily involved over the past year in divestments and acquisitions, opted to invest in its already-owned Equatorial Guinea Alba Field by installing a compression platform.