Blue Dolphin Energy Company operates as an independent refiner and marketer of petroleum products. The company engages in refining crude oil into marketable finished and refined products, such as non-road, locomotive, and marine diesel fuel, as well as naphtha, distillates, and atmospheric gas oil; and conducts petroleum storage and terminaling operations under third party lease agreements at the Nixon facility. It also provides pipeline transportation services comprising gathering and transporting oil and natural gas for producers/shippers operating offshore in the U.S. Gulf of Mexico. In addition, Blue Dolphin Energy Company engages in the oil and gas exploration and production activities. It holds leasehold interests in the High Island Block 115 located to the southeast of Bolivar Peninsula, Galveston Area Block 321 located to the southeast of Galveston, and High Island Block 37 located to the south of Sabine Pass in the U.S. Gulf of Mexico. The company is headquartered in Houston, Texas. Blue Dolphin Energy Company is a subsidiary of Lazarus Energy Services, LLC.