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The AAPG/Datapages Combined Publications Database

Showing 41,303 Results. Searched 191,995 documents.

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Sandstone Sheets and Related Intrusions from Coffee Bay, Transkei, South Africa

J. F. Truswell

Journal of Sedimentary Research (SEPM)

... the sheets may result from compression in an adjacent source area, with, in contrast, the more discordant features reflecting differing conditions...


Model Diapirs, Plasticity, and Tension

W. F. Tanner , G. K. Williams

AAPG Special Volumes

... as the structural development of the Caribbean area (left lateral along the northern margin, right lateral along the southern margin) is best interpreted locally...


Abstract: Robust Surface-Consistent residual Statics and Phase Correction…Part 1; #90224 (2015)

Nirupama Nagarajappa and Peter Cary

Search and

... objective function to be an ellipse whose local maxima exist along a sloped line as shown in Figure 2 (right panel). To reduce computation, we use...


Using Microseismicity to Understand Subsurface Fracture Systems and Increase the Effectiveness of Completions: Eagle Ford Shale, Texas; #41186 (2013)

John P. Detring and Sherilyn Williams-Stroud

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... et al., 2010; Wessels et al., 2011; Williams-Stroud et al., 2011). The SHmax observed on the World Stress Map near the study area is ~N25E, about 20...


The Nature and Classification of Organic-Associated Pores (OAP) Through Comparative Study on Marine, Transitional, and Continental Shales in Typical Areas, China; #41936 (2016)

Chao Yang, Jinchuan Zhang

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... Marine Tarim Basin ∈1 Niutitang a Ordos North Bohai Bay basin China Basin Basin b Qiang-tang Basin area areas Sichuan Basin Paleozoic marine...


Analysis of global navigation satellite system data along the Southern Gas Corridor and estimate of the expected displacements

Giuliana Rossi, Riccardo Caputo, David Zuliani, Paolo Fabris, Massimiliano Maggini, and Panagiotis Karvelis

Environmental Geosciences (DEG)

... (colored arrows) relative to a fixed Eurasia frame (simplified from Pérouse et al., 2012) in the broader area crossed by the investigated sector...


Distinguishing Depositional Setting For Sandy Deposits In Coastal Landscapes Using Grain Shape

Jordan Blair Reglin Eamer,, Dan Hirsh Shugar,,† Ian James Walker,,‡ Olav B. Lian, Christina M. Neudorf

Journal of Sedimentary Research (SEPM)

... in that a value of one would represent a circle. Roundness, however, measures area relative to a fitted ellipse, so it ignores irregular borders...


The Three Elements of Structural Geology, #41849 (2017).

Terry Engelder

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... clastic flux rests on carbonates (vertical white arrows) accumulated during periods of relative quiescence on a passive margin. The three tectonic...


An Alternative BEM Modeling of Transient Pressure Response of Fractured Reservoir by Use of a Semi-Analytical Approach

Junlei Wang, Ailin Jia, Yunsheng Wei, Yadong Qi

Unconventional Resources Technology Conference (URTEC)

... the fracture as a degenerate ellipse. Although they provided the analytical solution, the solution was expressed in forms of a series of Mathieu functions...


The effect of leaf orientation to sunlight on stomatal parameters of Quercus rubra around the Belgrade Lakes, central Maine

Rachel G. Daly, Robert A. Gastaldo


... tests the hypothesis that SD and SI are not influenced by a leaf’s physical orientation relative to the sun during the growing season. Sun leaves...


Laboratory Evaluation of a Real-Time Coaxial Cable Casing Imager for Wellbore Integrity Monitoring

Yurong Li, Runar Nygaard, Baokai Cheng, Wenge Zhu, Hai Xiao

Unconventional Resources Technology Conference (URTEC)

...) In differential form, the relative frequency shift is then, ∆𝑓 𝑁 𝑓𝑁 =− ∆𝑑 𝑑 − 1 ∆𝜀 𝑟 2 𝜀𝑟 (4) The equation above indicates that when...


Brent Oil Field

S. E. Livera

AAPG Special Volumes

... quantities was first discovered here in September 1965, in West Sole, and was followed by a spa e of further discoveries that proved the area...


Derivation of the Original Isotopic Composition of Permian Marine Cements

R. Kevin Given, Kyger C. Lohmann

Journal of Sedimentary Research (SEPM)

... to date these samples definitively; however, corr lation with shelf units does place constraints on their relative ages. This approach indicates...


Tectonic Motion in Western USA From Satellite Laser Ranging: Chapter 23: Part IV. Satellite Geodesy

D. C. Christodoulidis , D. E. Smith, S. M. Klosko , J. W. Robbins , P. J. Dunn , M. H. Torrence

AAPG Special Volumes

.... 9249-9263. Clark, T. A., D. Gordon, W. E. Himwich, C. Ma, A. Mallama, and J. W. Ryan, 1987, Determination of relative site motions in the western United...


Determining the Coal Bed Methane Distribution Based on Amplitude Variation With Offset (AVO) Analysis and Seismic Inversion: Case Study of Sumatra Basin

Padmadi Heru Wibawa, Abd. Haris, Suprajitno M.

Indonesian Petroleum Association

... with water, with methane is held in the coal by water pressure. Therefore, the existence of CBM is geologically found in the coal mining area. Currently...


Spatial Variations in Magnetic Properties and Paleomagnetic Directions in the Duperow Formation, Williston Basin

Maria Cioppa

Saskatchewan Geological Society

... of the Williston Basin, relative to the Appalachian and Rocky Mountains permits the effect of orogenesis to be examined. In this study, preliminary...


Advanced Imaging and Inversion for Oil Production Estimates in Unconventional Resource Plays

Greg M. Johnson, Paul Miller, David Phillips

Unconventional Resources Technology Conference (URTEC)

... economics of the program. For very little relative additional cost, 3D seismic technology can be effectively utilized to reduce the risk of drilling cost...


Geologic Implications of Artifact Distribution on Early Man Sites on Pleistocene Shorelines Near Sevier Lake, Utah, and Massacre Lake, Nevada

Byron J. Sharp

Utah Geological Association

... of Bonneville Level overlooking Sevier Lake showing cleared-out area (35 & 25–ft ellipse) which does not match the random distribution of conglomerate debris...


Learnings from the Gawler Craton airborne survey quality control

Matthew Hutchens

Petroleum Exploration Society of Australia (PESA)

... of the Gawler Craton. In total, 1.66 million line km were planned over an area of 295,000 km2, covering approximately 30% of the state of South Australia...


Measures of Particle Roundness: A NOTE

Bernard Swan

Journal of Sedimentary Research (SEPM)

... a corner as "every such part of the outline of an area ... which has a radius of curvature equal to or less than the radius of curvature...


Sieve Analysis as Tomography

William Menke

Journal of Sedimentary Research (SEPM)

... the size of quartz and mica grains (order of crystallization in the original rock, relative importance of chemical and mechanical weathering, and so...


Investigating the Controls of Salt Movement Using Finite Element Modelling; #42185 (2018)

James Hamilton-Wright, Stephen Dee, Christina Von Nicolai, Howard Johnson

Search and

...-most zone defined by the famous Sigsbee Escarpment. • Traditional views suggest that the shape of the base depends on the relative rates...


Possible Relationships Between Lineament Tectonics and the Dynamics of the Milky Way Galaxy

Peter J. Haman

Utah Geological Association

...’s position relative to the galactic centre with the rythmic expansions and contractions of the Earth. Steiner’s model predicts the change from...


A Test of New Global Tectonics: Comparisons of Northeast Pacific and California Structures

Mason L. Hill

AAPG Bulletin

.... 1959-1982. Nason, R. D., and T. H. Rogers, 1968, Active faulting in the Hollister area, in W. R. Dickinson and A. Grantz, eds., Proceedings of conference...


Ultrafast Hydraulic Fracturing Model for Optimizing Cube Development

Egor Dontsov, Andrew Bunger, Bradley Abell, Roberto Suarez-Rivera

Unconventional Resources Technology Conference (URTEC)

... with proppant to induce fractures that create a large surface area in contact with the reservoir (Economides and Nolte, 2000). At its inception, the technology...


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