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The AAPG/Datapages Combined Publications Database
Showing 33,055 Results. Searched 195,364 documents.
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
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
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
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
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
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
Abstract: Full Waveform Inversion of Crosswell Seismic Data Using Automatic Differentiation; #90187 (2014)
Danping Cao and Wenyuan Liao
Search and Discovery.com
... in Geophysics. The efficiency and accuracy of FWI are determined by the three main components: numerical solution for forward problem, gradient...
2014
Stress-Dependent Permeability and Dynamic Elastic Moduli of Reservoir and Seal Shale
Daisuke Katsuki, Anton Padin Deben, Olawale Adekunle, Andrew J. Rixon, Azra N. Tutuncu
Unconventional Resources Technology Conference (URTEC)
... bits in the horizontal direction (parallel to the bedding). Dry air was used as coolant while plugging to avoid unnecessary chemical disturbance...
2016
Turbulence Modulation in Clay-Rich Sediment-Laden Flows and Some Implications for Sediment Deposition
Jaco H. Baas, James L. Best
Journal of Sedimentary Research (SEPM)
... velocity gradient (Fig. 2 B) and (2) an upper zone (z/h > 0.25) where the velocity is nearly invariant with depth, i.e., a region of "plug flow" above...
2002
Identification and calculation of transfer overpressure in the northern Qaidam Basin, northwest China
Changyu Fan, Zhenliang Wang, Aiguo Wang, Suotang Fu, Liqun Wang, Yongshu Zhang, Hongxi Kong, and Xiao Zhang
AAPG Bulletin
... 6. With the pore-pressure gradient increasing, responses of different overpressure generation mechanisms on a sonic velocity–density crossplot...
2016
Hydraulic Factors Controlling the Shape of Laminae in Laboratory Deltas
Alan V. Jopling
Journal of Sedimentary Research (SEPM)
... type, flow discharge, rate of sediment transport, velocity, stream depth, basin depth, slope of the energy gradient, bed tractive stress, water...
1965
Physical Processes in the Ocean: Part 2: Relation of Oceanography to Sedimentation: PART 1
R. H. Fleming, Roger Revelle
AAPG Special Volumes
... °C. per kilometer. End_Page 53------------------------- That is, the vertical gradient is about 6000 times as great as the horizontal gradient...
1939
Determining a Good Hole Cleaning by Judging the Cutting Transport Parameter in 81/2" Horizontal Hole Section Leads to Operational Success During Underbalanced Drilling Operation
Raden Hanggara Tri Poetra, Kitos G. Akbar, Hasnan Rifani, Robani Sadiya
Indonesian Petroleum Association
... ½ inch horizontal UBD operation. We investigated the influence or the effect the variety of hole size, Bottom Hole assembly (BHA) tool size, cutting size...
2009