Evaluation and Economics of Shale Gas Reserves in the Flysch-Eocene Formation of the Jaca Basin

The new international outlook for the gas sector suggests evaluating exploitable reserves in previously unconsidered areas including hydraulic fracturing technology. In order to estimate amount of Jaca Flysch formation, analysis geological and geophysical logs volumetric method have been used. It has taking into account part formation likely contain gas, porosity (2.65%) calculated from sonic with Wyllie’s equation, water saturation (35.3%) Archie’s formula, initial volume factor (Bgi), estimated MHA-P3 software reservoir pressure/temperature data 3600 psi/90 °C. economic each well carried out based on three options, without stimulation, 50% 100% stimulation by fracking, five possible construction costs (7.5–15 MM€). impact use fracking technology production is about 48%. rate that its exploitation would domestic demand natural analyzed, resulting a significant contribution national energy mix between 10–20% consumption several years.