Xulum is one of the assets on offer in the shallow-water phase of Round Two. The field is part of Block 14 off the coast of Tabasco. Xulum was previously offered in Round One, but it received no bids. The field was formerly part of the Litoral de Tabasco business unit. The Xulum field structure is influenced by salt tectonics. Large offset reverse faults radiate from the main salt body. The exploratory well lies in the southeastern portion of an elongated anticline, with a five kilometre long axis, oriented in a northwest to southeast direction, approximately 3.8 kilometres wide.