Shale Gas Wells Drilled in 2012Tue, 01/22/2013 - 11:31
Having identified 200 potential opportunities in shale formations, Pemex intends to drill 175 wells by 2015. The NOC is focusing on five geological provinces with shale gas potential: Chihuahua, Sabinas-Burro-Picachos, Burgos Mesozoic, Tampico-Misantla, and Veracruz. Pemex plans to drill 20 wells in Burro-Picachos, 30 wells in Sabinas, and 25 in Burgos-Mesozoic, with 100 wells in other regions. In 2011, Pemex drilled its first shale gas well, Emergente-1. Located in the municipality of Hidalgo, Coahuila, the well has a depth of 2485m, with a lateral well of 1365m. The well is being fractured in 17 stages at a cost of between US$20 and US$25 million. Emergente-1 currently produces 3 mcf/d. In 2012, Pemex drilled several new shale wells.
Located in the Burgos basin, close to where the Emergente-1 and Habano-1 wells were drilled, Chucla-1 confirmed the existence of hydrocarbons during the first trimester of 2013. The Chucla-1 well has an initial production of 1.9 mcf/d of gas and 24 b/d of crude oil and condensates, which fuels the high shale expectations of the region.
Pemex began drilling Montañés-1 on August 8, 2011, in the municipality of Guerrero, Coahuila, located 60km northwest of where the first shale gas well, Emergente-1, was drilled. Drilling operations for the well were concluded on April 30, 2012, and the well was o·cially labeled as non-commercial. However, Pemex is using a field lab strategy to optimize productivity for the well.
Located in the municipality of Progreso, Coahuila, Percutor-1 is 150km southeast of previously drilled shale wells in the area surrounding Emergente-1. Drilling operations began on October 30, 2011 and were concluded on March 30, 2012, yielding the discovery of dry gas in the Upper Cretaceous Eagle Ford formation. This confirmed the continuation of the US Eagle Ford play reserves into the Sabinas region. Accumulated production figures for the field totaled 292 mcf of dry gas, at a rate of 2.2 mcf/d.
Part of the Burgos basin, Habano-1 is located in the municipality of Hidalgo, Coahuila. Drilling operations for the well began on December 6, 2011 and were concluded on April 15, 2012, confirming the presence of both dry gas and condensate. The presence of liquid hydrocarbons has raised hopes that this well will be commercially productive. Initial production figures for Habano-1 totaled 2.8 mcf/d of gas and 27 b/d of condensate.
Drilling operations for Arbolero-1 started on January 8, 2012, discovering dry gas in the Jurassic play. Though it had an initial production of 3.2 mcf/d, the well was deemed non-commercial due to the lack of liquid hydrocarbons necessary to make it a profitable project.
Located in the Burgos basin, inside Tampico-Misantla, Anhélido-1 was the first well drilled as part of Pemex’s shale exploration program to discover shale oil. In February 2013, the well was producing 288 b/d of shale oil. The production decline curve is still being observed to determine the profitability of the well and a field lab strategy has been planned by Pemex to test new technologies here.