Abstract

The Cantarell and Sihil fields are located in a complex system of compressive structures in the offshore Campeche Bay province in Mexico. The geometry of the Cantarell–Sihil structure varies along trend from a simple fault-related structure in the south to a duplex consisting of the Cantarell and Sihil structures in the central part to a more complex system consisting of compressive blocks separated by Tertiary normal faults in the north. The Cantarell–Sihil structures formed during three main episodes of deformation: (1) Jurassic to Early Cretaceous extension, resulting in the formation of normal faults that displace Tithonian, Kimmeridgian, and Lower Cretaceous units; (2) Miocene compression, during which the Cantarell–Sihil thrust system was formed; and (3) Pliocene to Holocene extension, during which several of the preexisting Jurassic normal faults were reactivated.

The Cantarell field produces out of three separate fault-bounded allochthonous blocks: the Akal, Nohoch, and Kutz blocks. The main field is located in the Akal structure. Secondary fields in the allochthonous block include Kutz, which formed on the crest of a downthrown fault block, and Nohoch, which formed above a west-vergent backthrust. The recently discovered Sihil field is located in a subthrust-compressive structure and consists of two structural lobes formed above the sub-Sihil fault. The Chac structure is formed at the updip edge of a tilted fault block in the autochthonous block. The detailed three-dimensional structural model is being used for future production of the remaining reserves in the Cantarell field as well as for the delineation of the Sihil field.

You do not currently have access to this article.