Though I tend to doubt this, I guess anything's possible. According to this post from the Aztlan website, American oil company giants Chevron, Shell, and British Petroleum, are engaged in a project to siphon oil from under Mexican territorial waters by way of a floating oil rig platform on American waters near the border. The diagram below tells the story.
Hey, isn't this what the Kuwaitis were supposedly doing to Saddam's Iraq that led to the first Gulf War? Or so Saddam claimed, at least. Like I said, I guess anything's possible. Curious.