Abstract

The island of Trinidad, situated at the easternmost extremity of the Eastern Venezuela Basin, is a known producer of conventional hydrocarbons, oil in previous years and natural gas at present. However, not much work has been done to identify, and more importantly, quantify the unconventional natural gas hydrate resource present in the Trinidad area. This paper presents a methodology for the identification of natural gas hydrate in Trinidad and the initial findings of this methodology using primarily three-dimensional (3D) seismic data from eastern offshore. The dataset covered an area of approximately 1788.6 km2 of transition zone between the continental shelf and slope in the Columbus Basin.

Analysis of the data shows the presence of several positive indicators which suggest that natural gas hydrate is present in the oceanic sediments. Bottom simulating reflectors (BSRs) were observed on the seismic data and the areal extent of these BSRs was determined to be 516.8 km2 or approximately 29% of the area of the mapped seafloor. Several mud volcanoes were also observed on the seismic volume.

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