A new horizon is emerging in the red-hot Delaware sub-basin of the Permian play in the US, as tight-oil explorers test an intriguing sand formation in the Upper Wolfcamp.
Companies such as Matador Resources and WPX Energy are starting to talk about the Wolfcamp X/Y, a little-understood section wedged between what is known as the Wolfcamp A and the 3rd Bone Spring.
Recent
