3D Seismic Pore Pressure Analysis in Offshore Arenque Field, Mexico

摘要

The Arenque marine field is located 30 km offshore in the East part of Tampico city. It is part of Tampico-Misantla basin and it produces 30°API oil. The producer reservoirs are Jurassic San Andres made up by grainstone and lower Cretaceous Tamaulipas composite by naturally fractured fine-grained limestone.rnIn 2004 PEMEX started a 3D seismic gathering, concluding in 2009 with a new reinterpreted geologic static model of San Andres and lower Tamaulipas reservoirs. The objective of 3D seismic was both, to explore new opportunities, and to accelerate the recovery of remaining reserves of the Arenque field. As a result of the reinterpretation, new paths of horizontal wells were defined, and a drilling program was worked out from 2010 to 2018 to drill both developed and infill wells as well as reentries.rnAt the beginning of the present century, PEMEX drilled several horizontal wells in the Arenque field with drilling times above 150 days. These drilling times had non-productive times originated by pore pressure and well instability problems. In this paper we presented a pore pressure analysis using 3D seismic compiled in the Arenque field. The aims of the analysis were both to visualize and quantify the behavior of geopressures in the field to redefine drilling designs of horizontal wells and to avoid non-productive times that duplicated programmed drilling times in the past. Within the analysis was defined the normal compaction trends for interval velocity, and also the pore pressure models were fixed to geological conditions of the marine portion of the Tampico-Misantla basin.