Bulletin Article


In reservoir engineering, hydrodynamic properties can be estimated from downhole electrical data using heuristic models (e.g., Archie and Kozeny-Carman's equations) relating electrical conductivity to porosity and permeability. Although proven to be predictive for many sandstone reservoirs, the models mostly fail when applied to carbonate reservoirs that generally display extremely complex pore network structures.

In this article, we investigate the control of the three-dimensional (3-D) geometry and morphology of the pore network on the electrical and flow properties, comparing core-scale laboratory measurements and 3-D x-ray microtomography image analysis of samples from a Miocene reefal carbonate platform located in Mallorca (Spain).

The results show that micrometer- to centimeter-scale heterogeneities strongly influence the measured macroscopic physical parameters that are then used to evaluate the hydrodynamic properties of the rock, and therefore, existing models might not provide accurate descriptions because these heterogeneities occur at scales smaller than those of the integration volume of the borehole geophysical methods. However, associated with specific data processing, 3-D imagery techniques are a useful and probably unique mean to characterize the rock heterogeneity and, thus, the properties variability.

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Explorer Article

This year's AAPG-SEG International Conference and Exhibition (ICE), held for the first time ever in Melbourne, Australia, was by all accounts a technical and networking success.
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Ireland has been a valuable research site for David Pyles – and his research there has been valuable for geoscientists everywhere.

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AAPG member Claudio Bartolini, a senior geologist with Repsol YPF in Houston, was visiting northern Spain in June when he visited San Juan de Gaztelugatxe islet, a tiny island on the coast of Biscay belonging to the municipality of Bermeo, in Spain’s Basque Country.
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Alternative Resources, Coal, Gas Hydrates, Geothermal, Renewable Energy, Bioenergy, Hydroelectric Energy, Hydrogen Energy, Solar Energy, Wind Energy, Uranium (Nuclear), Business and Economics, Economics, Reserve Estimation, Resource Estimates, Risk Analysis, Development and Operations, Engineering, Conventional Drilling, Coring, Directional Drilling, Infill Drilling, Drive Mechanisms, Production, Depletion Drive, Water Drive, Hydraulic Fracturing, Primary Recovery, Secondary Recovery, Gas Injection, Water Flooding, Tertiary Recovery, Chemical Flooding Processes, Microbial Recovery, Miscible Recovery, Thermal Recovery Processes, Reservoir Characterization, Environmental, Ground Water, Hydrology, Monitoring, Natural Resources, Pollution, Reclamation, Remediation, Remote Sensing, Water Resources, Geochemistry and Basin Modeling, Basin Modeling, Maturation, Migration, Oil and Gas Analysis, Oil Seeps, Petroleum Systems, Source Rock, Thermal History, Geophysics, Direct Hydrocarbon Indicators, Gravity, Magnetic, Seismic, Petrophysics and Well Logs, Carbonates, Sedimentology and Stratigraphy, (Carbonate) Shelf Sand Deposits, Carbonate Platforms, Carbonate Reefs, Dolostones, Clastics, Conventional Sandstones, Deep Sea / Deepwater, Deepwater Turbidites, Eolian Sandstones, Estuarine Deposits, Fluvial Deltaic Systems, High Stand Deposits, Incised Valley Deposits, Lacustrine Deposits, Low Stand Deposits, Marine, Regressive Deposits, Sheet Sand Deposits, Shelf Sand Deposits, Slope, Transgressive Deposits, Evaporites, Lacustrine Deposits, Salt, Sebkha, Sequence Stratigraphy, Structure, Compressional Systems, Extensional Systems, Fold and Thrust Belts, Geomechanics and Fracture Analysis, Salt Tectonics, Structural Analysis (Other), Tectonics (General), Coalbed Methane, Deep Basin Gas, Diagenetic Traps, Fractured Carbonate Reservoirs, Oil Sands, Oil Shale, Shale Gas, Stratigraphic Traps, Structural Traps, Subsalt Traps, Tight Gas Sands
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Explorer Emphasis

Kitty L. Milliken wins not one, but two major AAPG awards for her groundbreaking research— the Robert R. Berg Outstanding Research Award and the Wallace E. Pratt Memorial Award.
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A strong, integrated and active group of explorationists is still recognized as the most effective way to add value to a company by what is called "organic growth," which is very much a long-term activity.

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Explorer Regions and Sections


The Ayoluengo field, commonly cited as Spain’s only onshore oil field, was discovered in June 1964. Today, 50 years later, the field is still active, with an average production of some 100 barrels oil per day and a total cumulated oil production of nearly 17 million barrels of oil.

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Learn! Blog


Participants will examine illustrative outcrops of thrusts, fault-related folds, stratal architectures and facies of depositional systems affected by growing structures, which are good analogues for hydrocarbon reservoirs. Objectives include interpreting complex thrust structures, identifying and understanding strain and fracture systems in fold-thrust belts, and analyzing patterns of growth strata in areas with synsedimentary folding.

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