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Non-seismic and non-conventional methods of exploration for oil and gas in Cuba: a review


Fluid Mechanics Research International Journal
Manuel E. Pardo Echarte, Osvaldo Rodríguez Morán

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Abstract

In oil and gas exploration, a decisive aspect is constituted by vertical microseepage of light hydrocarbons on gas-oil accumulations and the modifications that they produce in the surface environment (fundamentally, soils). Non-seismic and non-conventional exploration methods are responsible for detecting and mapping these modifications in the surface environment, thus complementing the complex of conventional methods with subsurface geological-structural mapping (~ 500m), the basis for a reduction of areas, with the consequent increase in the effectiveness of investigations and the reduction of risk in exploration. Unfortunately, the acceptance of these methods and their results is still going through a bad time, since the community of explorers and geoscientists who use seismic as their main investigative-exploratory tool still reject them or use them very limitedly. The aforementioned methods most used in Cuba are: Remote Sensing, Gravimetry, Aeromagnetometry, Unconventional Morphometry, Aerial Gamma Spectrometry and the Redox Complex. Also, Surface Geochemical Exploration is used with various direct methods. In relation to international literature, the processing and interpretation of geophysical-geochemical information in our country has innumerable theoretical-methodological inventions and innovations, totally Cuban. The work presented offers a current overview of the aforementioned methods in Cuba, based on a systematization-generalization of their information in almost a decade. The physical-chemical-geological premises that support the different methods, the main methodological characteristics have been addressed, and the most important geological tasks and their main results have been briefly examined on: the presence of biogenic methane; offshore exploration; support for geological mapping; the exploration of asphalt and bituminous rocks; exploration in land blocks; the exploration of sedimentary basins and; naphtha and gas exploration.

Keywords

gas-oil accumulation, micro seepage, non-seismic and non-conventional exploration methods, remote sensing, gravimetry, aeromagnetometry, unconventional morphometry, aerial gamma spectrometry, redox complex

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