Comprehensive Basin Analysis and Petroleum Potential Evaluation of Ayoluengo Oil Field, Basque-Cantabrian Basin, Spain
Odoh, B. I.
Department of Applied Geophysics, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.
Ahaneku, C. V.
*
Department of Geological Sciences, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria and Department of Geosciences, Marine Geology and Seafloor Surveying, University of Malta, Msida, Malta.
Nwafuluibeya, S. C.
Department of Geological Sciences, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.
Ijeh, E. C.
Department of Geological Sciences, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.
Ochili, M. C.
Department of Geological Sciences, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.
Okpara, A. O.
Department of Applied Geophysics, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.
Ozoemena, O. G.
Department of Geological Sciences, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.
Eze, I. E.
Department of Marine and Coastal Environmental Science, Texas A&M University at Galveston, USA.
Okeke, G. C.
Department of Applied Geophysics, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.
Udeh-Akpeh, T. O.
Department of Applied Geophysics, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.
*Author to whom correspondence should be addressed.
Abstract
This study presents a comprehensive basin analysis and petroleum potential evaluation of the Ayoluengo oil field in the Basque-Cantabrian Basin, Spain. Using an integrated approach combining geological, geophysical, and geochemical data, we analyzed the basin's evolution and petroleum system elements. The dataset included 2D and 3D seismic data, well logs, formation tops, and geophysical maps. Our analysis revealed a complex structural framework characterized by salt diapirism and halokinetic structures. Well log interpretation and sequence stratigraphic analysis identified two genetic sequences with associated systems tracts. Four reservoir units were mapped, with the main structural traps related to salt diapirs. Seismic facies analysis highlighted high-amplitude convergent (CBH) and high- and low-amplitude convergent (CBHL) facies as the most promising for reservoir quality. The study identified one play (Jurassic) and two prospects: Lias Limestone (80% geologic chance of success) and Carniolas Dolomite (85% geologic chance of success). Volumetric calculations estimate significant hydrocarbon potential, with STOIIP (Stock Tank Oil Initially In Place) ranging from 3.4 to 4.2 x 10^16 barrels for the Lias Limestone reservoir and 1.26 to 1.56 x 10^16 barrels for the Carniolas Dolomite reservoir.
Keywords: Basin analysis, Petroleum potential, Ayoluengo oil field, Basque-Cantabrian Basin, 2D/3D seismic data, Well logs, Formation tops, Salt diapirism, Halokinetic structures, Sequence stratigraphy, Genetic sequences, Systems tracts, Reservoir units, Salt diapirs, Seismic facies