AAPG/GSTT HEDBERG CONFERENCE
“Mobile Shale Basins – Genesis, Evolution and Hydrocarbon Systems”
Exploration and Development Unlimited,
Exploration and Development Unlimited, La Romaine, Trinidad,
Trinidad Exploration and
Development (TED) drilled the Habanero #1 well along the crest of the Southern
Range anticline in the Southwest Peninsula area of
The primary objective was to test
deepwater deposits of the Lower Cruse/Lengua formations in a structurally
advantageous position based on 170 square kilometers of 3D seismic
data from the
The well drilled from the surface through 3200 feet of interbedded mudflow material as confirmed by palynology, paleontology, velocity, density, pressure, temperature and salinity information. From depths of 3200 to 8000 feet the well drilled interbedded sandstones, siltstones and shales of the Cruse formation and encountered numerous gas shows with minor oil shows. At a depth of 8000 feet drilling reached rig limitations before the Lower Cruse objective was penetrated. Perforations from two intervals produced water with a minor show of oil, and one interval yielded no flow.
Pressures were very high while drilling, with mud weights exceeding 17 pounds per gallon. The well encountered several pressure reversals which made drilling the well challenging. High pressures associated with drilling along the crest of the Southern Range anticline in the vicinity of a mud volcano likely caused seals to periodically breach, allowing hydrocarbons to leak from potential reservoir units.
AAPG Search and Discovery Article #90057©2006 AAPG/GSTT Hedberg Conference, Port of Spain, Trinidad & Tobago