Horizontal wells being developed by EOG Resources in Chugwater, Wyo., have piqued the interest of oil companies and investors. Successful results from the prospects would expand the Niobrara Shale's geographic range from Colorado. "I've heard rumors about what some of the wells are doing. But at this point, they're strictly that -- they're rumors. Even though they're 80[%] to 90% correct," said Dan Barnes of Barnes Land & Energy.