Jim Cramer explains why more mergers in the energy and oil space could be in the works. : CNBC's Jim Cramer on Wednesday said investors could expect to see more mergers and acquisitions in the energy and oil space in 2019. "Anadarko was the first big oil deal this year, but I bet it won't be the last," the "Mad Money" host said. "That's why I like Apache, I like Concho, Parsley, and especially Pioneer Nat, because this industry still needs much more consolidation."