The Ramos gas field is located in the northwest of Argentina, in a NNE-SSW anticlinal trend in the southernmost part of the Subandean Thrust Belt. The field produces from naturally fractured Devonian reservoirs from the upper thrust sheet, which was formed<br>during the Andean Orogeny. There have been many efforts to improve the knowledge of the structure; most were focused on development optimization relegating the exploratory activities. As a consequence of the poor quality of the seismic data, due to the structural complexity, the use of the seismic method for geological model delineation has been discouraged down through the years. As a result all the models were mainly generated using surface geology and well information. The actual need for reserves encouraged a new attempt to obtain valuable information from seismic data. The activities consisted in the acquisition of a test line and the reprocessing of existing 2D seismic lines, both in time and depth. The improvement in data quality, achieved by reprocessing the seismic with new techniques and the new line acquired, allowed the seismic method to be used as an exploratory tool for the Ramos anticline. New and more robust models were generated with the new data and this resulted in the proposal of an exploratory well with targets deeper than the actual producing zones.


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