Exxon Plans Longest 20,000-Ft Wells on Pioneer’s Midland Asset / Latest / By mark Exxon Mobil has already drilled some of the longest wells in the New Mexico Delaware Basin. Now, the Texas-based supermajor looks to go longer on Pioneer’s Midland Basin asset. Share this: Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X Related