HOUSTON, TX — (Marketwire) — 06/05/12 — SEACOR Energy Inc. ("SEI"), a subsidiary of SEACOR Holdings Inc., today announced that effective immediately, the company will begin moving shale oils through its position at Gateway Terminals LLC ("Gateway"), an affiliate of SEI.Gateway is located on the Mississippi River across from downtown St. Louis, Missouri, and offers truck, rail (including unit trains), and barge in and out capability. With its convenient location on the Al