Abstract: The Role of Regional Play Based Exploration in Recent Exploration Success in the Dinarides

This presentation uses a regional prospectivity assessment of the Greater Adriatic region to illustrate how the forensic review, re-assessment and re-interpretation of a suite of historical geoscience databases can lead to the identification of new play elements and petroleum systems in an established hydrocarbon province.

This presentation uses a regional prospectivity assessment of the Greater Adriatic region to illustrate how the forensic review, re-assessment and re-interpretation of a suite of historical geoscience databases can lead to the identification of new play elements and petroleum systems in an established hydrocarbon province.

The area of interest is located on the European Plate and has undergone a complex tectonic evolution which commenced with regional Mesozoic Tethyan extension and culminated in compression associated with the collision of Africa and Eurasia which led to the Tertiary Alpine orogeny. This region, which extends from eastern Italy to the Balkans, is a proven hydrocarbon province of historical importance that contains some of the largest onshore oil fields in Europe, such as the Val D’Agri field in the southern Apennines and the Patos-Marinza field in Albania.

Re-mapping of the basin architecture provided new insights into the nature and timing of the structural evolution and sedimentary fill of the region. A re-interpretation of the available hydrocarbon occurrence and geochemical database led to the division of the region into a suite of play domains. Thrust geometries and the position of the basal decollement were shown to exert a first order control on charge access. Reservoirs consist mainly of Triassic to Paleogene platformal to basinal carbonates and Oligocene to Pleistocene siliciclastics. Within the fold and thrust belt significant effective porosity is associated with the presence of pervasive fracture networks. The region shows a wide range of trapping geometries including both structural and stratigraphic trapping configurations. Regionally mappable first order unconformities control in large part the distribution of sealing sequences. By using a play based, multi-disciplinary approach these new analyses were convolved to identify additional potential in both new and established plays in the region.

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Visiting Geoscientist

Keith

Keith Gerdes

Professor

Shell International Ltd., London, UK

Europe

Abstracts

  • 22390 The carbonate sequences that were deposited in the now exhumed Tethyan Ocean influence many aspects of our lives today, either by supplying the energy that warms our homes and the fuel that powers our cars or providing the stunning landscapes for both winter and summer vacations. They also represent some of the most intensely studied rock formations in the world and have provided geoscientists with a fascinating insight into the turbulent nature of 250 Million years of Earth’s history. By combining studies from the full range of geoscience disciplines this presentation will trace the development of these carbonate sequences from their initial formation on the margins of large ancient continental masses to their present day locations in and around the Greater Mediterranean and Near East region. The first order control on growth patterns and carbonate platform development by the regional plate-tectonic setting, underlying basin architecture and fluctuations in sea level will be illustrated. The organisms that contribute to sequence development will be revealed to be treasure troves of forensic information. Finally, these rock sequences will be shown to contain all the ingredients necessary to form and retain hydrocarbons and the manner in which major post-depositional tectonic events led to the formation of some of the largest hydrocarbon accumulations in the world will be demonstrated. Tethyan Carbonates - Linking Tropical Seas and Crashing Plates to Some of the Largest Oil and Gas Fields in the World https://www.aapg.org/career/training/in-person/visiting-geoscientist/abstract/Articleid/22390/tethyan-carbonates-linking-tropical-seas-and-crashing-plates-to-some-of-the-largest-oil-and-gas-fields-in-the-world
    Tethyan Carbonates - Linking Tropical Seas and Crashing Plates to Some of the Largest Oil and Gas Fields in the World
  • 53093 Our geoscience projects often identify new play concepts or highlight additional potential in existing plays that were previously overlooked. But where do we go from there? How do we earn the right to test these ideas with the drill bit? What leads companies to decide to spend tens, and sometimes hundreds, of millions of dollars to test a geological idea or play concept? Turning a Play Evaluation into an Exploration Opportunity https://www.aapg.org/career/training/in-person/visiting-geoscientist/abstract/Articleid/53093/turning-a-play-evaluation-into-an-exploration-opportunity
    Turning a Play Evaluation into an Exploration Opportunity

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