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The AAPG/Datapages Combined Publications Database
Showing 34,455 Results. Searched 200,293 documents.
Multi-survey full-waveform inversion gradient balancing with illumination probing method
James Xu, David F. Halliday, Federico G. Andreasi, Xikai Zhao, James Rickett
International Meeting for Applied Geoscience and Energy (IMAGE)
.../weak gradient amplitudes are due to illumination effect or model errors. In addition, gradient balancing problem do not only exist in multi-survey...
2024
The Geophysical Aspects of Abnormal Fluid Pressures
Edward B. Reynolds, John E. May, Alf Klaveness
Houston Geological Society
... of reflection geometry for a velocity analysis. 34 Figure 1c. Examples of velocity analyses from two offshore Louisiana areas. 35 Figure 2. Effect...
1971
Gas Hydrates in Ocean Bottom Sediments
M. K. MacLeod
AAPG Bulletin
... in a localized region. The variables discussed are ocean bottom temperature, geothermal gradient, t ermal conductivity, heat flow, hydrate velocity, gas...
1982
Effect of near offset seismic data in shallow subsurface modeling using full-waveform inversion
Md Iftekhar Alam, Salman Abbasi
International Meeting for Applied Geoscience and Energy (IMAGE)
... demonstrates the effect on the velocity gradient in shallow subsurface modeling using FWI. The overarching goal of these experiments was to understand...
2024
Abstract: Velocity Problems not Related with Thrusting or Salt Tectonics, by O. Ferraris, A. Salinas, M. Koremblit, and D. Soubies; #90933 (1998).
Search and Discovery.com
1998
Horizontal well: The key factor to improve oil recovery in Bohai Bay
Xiaoming Chen, Yingxian Liu, Hui Cai, Meinan Wang, Junting Zhang
International Meeting for Applied Geoscience and Energy (IMAGE)
... pressure gradient has no obvious effect. Reservoir numerical simulation shows that at high water cut stage horizontal wells may increase the magnitude...
2022
Seismic Anisotropy VTI Modeling and Mechanical Properties of Kerogen in Gas Shale, #42486 (2020).
Anggoro S. Dradjat, Agus Djamil, M. Firwan Aprizal
Search and Discovery.com
... in both directions called mechanical anisotropy; measuring mechanical response on horizontal stratification is by using seismic P wave velocity...
2020
Geoscience Applications to Economic Development of a Relatively Shallow, Low Gravity, Structurally Complex Eagle Ford Oil Development, Atascosa County, Texas
Lee Billingsley, Bill, Layton, Luke, Finger
Unconventional Resources Technology Conference (URTEC)
... and geosteering of nine, widely spaced horizontal wells indicates that velocity is faster near the downthrown side of growth faults. Improved...
2015
Structure Beneath Continental Shelf, Northeastern Gulf of Mexico
John W. Antoine , James L. Harding
AAPG Bulletin
... are complicated by very high velocity material near the surface, with a positive velocity gradient commencing approximately 85 meters (279 feet) from...
1965
A Phase Diagram for Turbulent, Transitional, and Laminar Clay Suspension Flows
Jaco H. Baas, James L. Best, Jeffrey Peakall, Mi Wang
Journal of Sedimentary Research (SEPM)
.... In lower transitional plug flows, the basal internal shear layer separates a lower region of high vertical gradient in horizontal velocity...
2009
Meramec Velocity Systematics
Jing Fu, Carl Sondergeld, Chandra Rai
Unconventional Resources Technology Conference (URTEC)
... horizontal and vertical samples from the same depth. Fig. 6 Velocity measured from different orientations. Vp_horiozntal, Vs_fast, and Vs_slow can...
2020
Abstract: Tomography of a Velocity Modeland Location of Microseismic Events with P, Sv and Sh Waves; #90224 (2015)
Malgorzata Chmiel and Thomas Bardainne
Search and Discovery.com
...: gradient velocity model, 1D multi-layer blocky model, multi layers gradient velocity model, anisotropic layered model. Best results were obtained...
2015
Sediment Movement in Relation to Current Velocity
Henry W. Menard
Journal of Sedimentary Research (SEPM)
... horizontal current velocity was more than ten cm/sec. The velocities plotted represent deposition of material transported as bed-load. The deposition...
1950
Abnormal Formation Pressures: Recognition, Distribution, and Implications for Geophysical Prospecting, Brazoria County, Texas
Edward T. Flanigan
GCAGS Transactions
... = Interval travel time from seismic data (seconds) hi = Interval thickness from an adjacent well (feet) In effect, Va is the velocity applied...
1981
Abstract: A Case History of Velocity Problems in the Shadow of a Large Growth Fault in the Frio Formation, Texas Gulf Coast
James L. Allen and J. M. Bruso, Jr.
Houston Geological Society Bulletin
..., demonstrated a severe average velocity gradient across the prospect at the level of the objective geologic formation. Assuming first one...
1989
Limitations of Reflection Seismograph
L. E. Nugent, Jr.
AAPG Bulletin
... the shot. Since the shot is fired in a high-velocity zone, the effect of the low-velocity zone is removed from a detector at the shot point if the uphole...
1953
Optimizing Proppant Placement in Rough-Walled Rock Fractures
Min Zhang, Maša Prodanović
Unconventional Resources Technology Conference (URTEC)
... uniformly over the horizontal fracture without considering gravity effect, while for the vertical fracture an obvious proppant settling bank is observed...
2019
The Effect of High Pressure and Temperature Variations on the Hydraulic of Dual Gradient Drilling Operations Using Lifting Method
Bonar Tua Halomoan Marbun, Hafiz Adi Kurnia
Indonesian Petroleum Association
...The Effect of High Pressure and Temperature Variations on the Hydraulic of Dual Gradient Drilling Operations Using Lifting Method Bonar Tua Halomoan...
2012
Geological Factors Influencing Porosity Estimates From Velocity Logs
Roberto Sarmiento
AAPG Bulletin
.... This velocity gradient must be an effect of tectonism, and is probably due to differences in compaction of the sediments. From the practical point of view...
1961
Seismic Anisotropic Fracture Characterization using Azimuthal Amplitude versus Angle (AVAZ) Combined with Azimuthal Frequency versus Angle (FVAZ)
Salah El Din R Mahmoud, Hassan Al-Marzooqi, Maryam Alqaydi, Amna Alharthi, Muhammad Z. Baig, Abdulla A. Al-Hashmi
Unconventional Resources Technology Conference (URTEC)
...) are due to higher azimuth-45o values. This is because gradient increase with gas effect is more represented on the 45o azimuth (Figure 4), with higher...
2022
A Comparison of the Various Methods of Dip Migration
H. Bruce Mayo
Oklahoma City Geological Society
... some of the effects observed. Horizontal Displacement The hunter type plotter will produce the maximum horizontal displacement, with the average velocity...
1958
Evaluation of possible gas microseepage mechanisms
Alton Brown
AAPG Bulletin
... affect on continuous gas-phase flow. The major effect is a decrease in pressure gradient by the sine of the dip angle. This results in a minor velocity...
2000
Extended Abstract: A Steady-State Approach for Surge and Swab Pressures Calculation of Herschel-Buckley Fluids in Directional/Horizontal Wells
Wenlong Jiang, Honghai Fan, Rongyi Ji, Deqiang Tian, Wen Zixiang, Yuan Gao, Rui Dai, Fuxin Han, Sun Yizhen
Africa Energy and Technology Conference, 2016
... a new model for computing surge/swab pressures of Herschel-Buckley (HB) fluid in horizontal/directional wells which involves the effect of eccentric...
2016
The Application of Velocities and Models to Seismic Interpretation
G. Jarrota
Indonesian Petroleum Association
... time, on this example it runs from .1 to 3.4 seconds. The horizontal scale corresponds to seismic velocity, it starts from 1.5 km/sec up to 6 km/sec...
1977
Identifying Fracture Zones in the Austin Chalk
D. J. Bafia, T. W. Spencer
Bulletin of South Texas Geological Society
... the impedance contrast, the anomaly must result in a greater velocity. A clean chalk will account for this variation and produce the desired effect...
1999