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The AAPG/Datapages Combined Publications Database

Showing 31,478 Results. Searched 189,922 documents.

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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...


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...


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...


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...


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

...: gradient velocity model, 1D multi-layer blocky model, multi layers gradient velocity model, anisotropic layered model. Best results were obtained...


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...


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...


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...


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...


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...


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...


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...


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...


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...


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...


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...


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...


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...


Abstract: Full Waveform Inversion of Crosswell Seismic Data Using Automatic Differentiation; #90187 (2014)

Danping Cao and Wenyuan Liao

Search and

... in Geophysics. The efficiency and accuracy of FWI are determined by the three main components: numerical solution for forward problem, gradient...


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...


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...


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...


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...


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...


Enhancing PSDM via Well Data Derived from Gradient Boosted Trees Machine Learning

Marianne Rauch, Mike Perz, Sathiya Namasivayam, Ritesh Sharma

Unconventional Resources Technology Conference (URTEC)

...Enhancing PSDM via Well Data Derived from Gradient Boosted Trees Machine Learning Marianne Rauch, Mike Perz, Sathiya Namasivayam, Ritesh Sharma URTeC...


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