"Opportunity in a World-class Hydrocarbon Basin: Trinidad and Tobago’s Eastern Offshore Marine Province"
By: Lesli J. Wood (1) and Carolyn Roberts (2)(1)Bureau of Economic Geology, University of Texas at Austin, Austin, Texas lesli.wood@beg.utexas.edu
(2)Ministry of Energy and Energy Industries, Trinidad & Tobago, Port-of-Spain, Trinidad croberts@energy.gov.tt
Published in the June, 2001 Bulletin, posted here, May 27, 2001.
Figure Three
NE-SW trending seismic line X-X' and line drawing modified from Wood (2000) showing down-to-the-northeast roller faults (D, G, H and H1), remnant shale buldges and characteristic bow-tie anticlines that are younger to the northeast. Note the abundance of roller faulting that climbes upsection to the northeast indicating growth and basinward miration of anticline crests
Figure Four
Chronostratigraphic chart of the Trinidad eastern offshore marine province (Colombus Basin of Loenard, 1982). Note the overall continuous progradational character of megasequences in the basin.
Figure Five
Schematic illustration of a bow-tie anticlical structure developing in the hanging wall of a roller fault. Sediments thicken in the landward directions along normal growth faults and in the basinward direction along counter-regional faults associated with large toe-of-slope shale diapirs. Significant secondary rollover faults forming from structural crest migration basinward will have a significant impact on hydrocarbon distribution as fluids fill-and-spill their way across the structure.
