Pore space evolution and elastic properties of platform carbonates (Urgonian limestone, Barremian–Aptian, SE France)

The equivalent pore aspect ratio as a tool for pore type prediction in carbonate reservoirs

“…The pre-salt database includes cores, side-wall plugs, thin-sections and well-logs from two wells located offshore Brazil. Results from the Provence and Gargano case studies are based on the laboratory acoustic database published respectively by Fournier et al (2014) and Hairabian et al (2014) and on a revision of the pore typing for the corresponding samples.…”

“…The measurement protocol for these samples is detailed in Fournier et al (2014) for the Urgonian limestones from Provence and in Hairabian et al (2014) for the Gargano samples. The ultrasonic velocities integrated in the present paper were measured at 40 MPa.…”

“…Urgonian limestones from Provence are dominantly microporous (Fournier et al, 2011), but moldic and intergranular porosity may also represent a significant proportion of the pore volume in such reservoirs (Borgomano et al, 2013;Fournier et al, 2014). A scenario of the pore space evolution in the Urgonian limestones from Provence (SE France) has been proposed by Leonide et al (2014): 1) microporous limestones have been interpreted to develop by micrite neomorphism processes in a meteoric shallow-burial setting probably during a regional subaerial exposure event (Albian-lower Cenomanian); 2) tight limestones resulted from an early marine and/or meteoric cementation of the intergranular macropores and intercrystalline micropores and 3) dissolution of aragonitic shells occurred during early (syn-Urgonian) phases of subaerial exposure whereas a later phase of leaching of possible telogenetic origin led to microporosity enhancement and moldic/vuggy porosity development.…”

“…Scenarios of diagenetic and pore network evolution of the Urgonian limestones from Provence have been proposed by Léonide et al (2014) and Fournier et al (2014). According to these interpretations, highly microporous limestones are considered to have developed as a result of micrite leaching and neomorphism in a meteoric shallow-burial setting probably during a.…”

Variations in petrophysical properties along a mixed siliciclastic carbonate ramp (Upper Jurassic, Ricla, NE Spain)

“…The variations of these properties in carbonate rocks are predominantly debated due the geometrical complexity of the pore and rock network and their susceptibility to chemical and mechanical processes at multiple scales (Anselmetti and Eberli, 1993;Eberli et al, 2003;Baechle et al, 2008;Xu and Payne, 2009;Fournier et al, 2014;Soete et al, 2015). Siliciclastic systems, on the other hand, are more homogeneous and less affected by chemical and mechanical processes.…”