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Fold and Thrust Belts

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Volumetric restoration can provide crucial insights into the structural evolution of three-dimensional (3-D) petroleum systems. A major limitation to its widespread application is the need to include complex architectures and realistic mechanics such as flexural slip. We apply an implicit approach that allows for, including unconformities, thin and/or pinched-out layers in the models but that cannot explicitly localize slip along horizons. To take advantage of this approach while accounting for flexural slip in 3-D restoration, we investigate new geomechanical properties. We consider flexural slip folding as a result of stacked rigid and thin weak layers, which can be modeled using transversely isotropic properties. We compare restorations of an anticline using transversely isotropic properties, isotropic properties, and a stack of rigid isotropic layers with nonfrictional slip between the layers. Our results show that transversely isotropic properties reasonably approximate flexural slip folding. We use these new tools to model the evolution of a complex system located in the Niger Delta toe. The system includes a detachment fold, a fault-bend fold, and a structural wedge formed in series. Growth stratigraphy and erosional surfaces delimit the kinematics of deformation. Regional erosive surfaces, 3-D gradients of fault slip, and vertical variations in mechanical strength motivated the use of our new restoration techniques. Restoring two growth units results not only in reinforcing the interpretation that the area is behaving as a deforming thrust sheet at critical taper, but also in highlighting coeval activity on both the hinterland structures and the toe of the thrust belt.
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In the rough terrain of overthrust settings, 2-D seismic data continues to be a standard tool for subsurface mapping – and not only because of economic reasons. Two-D and 3-D seismic surveys are complementary in land environments, because each data type has its own strength and weakness.

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Italy will be in the AAPG spotlight in October as it becomes, for the first time ever, the host country for the AAPG International Conference and Exhibition.

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AAPG’s prestigious Distinguished Lecturer program, which offers audiences a chance to hear the latest in geoscience research, understanding and practical applications, kicks-off its new season with three speaking tours planned for September.

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A $3.5 million proprietary 3-D seismic survey was recorded in central Pennsylvania region to determine the effectiveness of modern 3-D/3C seismic data in extracting certain rock properties of the Marcellus Shale.

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A popular part of the AAPG education department's many offerings is the compelling and often exotic field seminar program – and right now AAPG is looking for new leaders and fresh ideas for areas to visit and study.

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It is a little over 25 years since the Iagifu 2-X well drilled by Niugini Gulf Oil discovered Papua New Guinea’s first commercial oil field – the Kutubu field, which was put into production in 1992 by Chevron Niugini Pty Ltd. after they acquired the assets of Gulf Oil.

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Doug Strickland dreamed big when his work led to discovery of the Covenant oil field in central Utah.

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In-Person Training
Naples Italy 01 October, 2016 07 October, 2016 36 Mobile /Portals/0/PackFlashItemImages/WebReady/fs-carb-complex-carbonate-reservoirs-sedimentation.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Sedimentology and Stratigraphy, Carbonates, Structure, Fold and Thrust Belts, Engineering, Reservoir Characterization, Carbonate Platforms
 
Naples, Italy
1-7 October 2016

The main part of the field seminar will focus on the description of the fractured carbonates and the extrapolation from the outcrop observations to the subsurface for building geologically plausible reservoir models.

Online Training
14 February, 3000 14 February, 3000 7817 Mobile /Portals/0/PackFlashItemImages/WebReady/oc-es-generic-hero.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
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