AAPG Memoir 76, Chapter 18: Velocity Estimation for Pore-Pressure Prediction

David W. Bell

AAPG Special Volumes

...) indicates a reduction in interval velocity. A decrease in slope (toward the horizontal) indicates an increase in interval velocity. A sharp slope...

Petroleum Geologist and Exploration Geophysicist: Co-Ordination and Seismic Velocity

John D. Hale

CSPG Bulletin

... some effect on the velocity gradient. Examples are volcanic basalt flows and chert zones. 6. The presence of an extremely porous layer within...

Production Modeling for Velocity String Applications in Unconventional Wells

Suat Bagci, Tina Chang

Unconventional Resources Technology Conference (URTEC)

.... The effect of velocity string size and length on the performances of ESP and gas lift installed wells were studied. Gas slugging behavior was reduced...

A Steady-State Approach for Surge and Swab Pressures Calculation of Herschel-Buckley in Directional/Horizontal Wells

Search and Discovery.com

Abstract: Migration Velocity Analysis of Incomplete Data Using LSPSM CIGs; #90174 (2014)

Abdolnaser Yousefzadeh, John C. Bancroft, and Gary F. Margrave

Search and Discovery.com

...ion. Same improvement achieved with using common offset CIGs (Yousefzadeh et. al., 2011). To see the effect of the velocity accuracy on LSPSM, consider a ...

Azimuthal Variations in Reflection Seismic Data: Measurements Governed by the In-Situ Horizontal Stress Field and/or Vertical Aligned Fractures

Heloise B. Lynn, Walter S. Lynn

West Texas Geological Society

... on their relative azimuths. The effect of the fractures and / or unequal horizontal stresses on the seismic signal depends on the relative scale length...

A Comparison of Depth-Conversion Methods in the Gulf of Mexico

Melvan D. Carter, Gary R. Hyatt

GCAGS Transactions

... the simplest constant-function approach to the "layer-cake" method to an average-velocity technique based upon seismic velocities, each method has...

AAPG Memoir 76, Chapter 19: The Future of Pressure Prediction Using Geophysical Methods

Alan R. Huffman

AAPG Special Volumes

... by the slow decrease in the velocity gradient with depth. The other class of abnormal pressure mechanisms is not associated with the compaction process...

Pressure Analysis for Volume Fracturing Well in Tight Reservoirs Considering Dynamic Threshold Pressure Gradient and Stress Sensitivity

Zhongwei Wu, Chuanzhi Cui, Xiangzhi Cheng, Zhen Wang, Yingfei Sui, Xiaoyan Zhao

Unconventional Resources Technology Conference (URTEC)

.... In this paper, the dynamic threshold pressure gradient and permeability modulus are respectively utilized to characterize the low-velocity non-Darcy flow...

Combined Geophysical Methods for Investigating the Border Area of the Kamsko-Kinel Depression

Yu. A. Byakov, S. A. Shikhov

Petroleum Geology: A Digest of Russian Literature

... horizontal gradient with graphs of effective velocity for a reflecting horizon located below the clastic unit. On six profiles for which data...

A new double-difference earthquake relocation algorithm for models with complex velocity structure

Xinding Fang, Siwei Li, Zhixiang Zhang, Tianrun Chen, Yingcai Zheng

International Meeting for Applied Geoscience and Energy (IMAGE)

... relocation method that does not require the calculation of traveltime gradient and thus is applicable to models with complex velocity structure. Our results...

Section 2: Improvement of Seismic Images of Complex Tectonic Structure in Deep Water with Research-Level Processing Sequences

John Miller and Roland von Huene

AAPG Special Volumes

... a time- and space-varying velocity model along the line. 4. NMO--removes the effect of the source-receiver separation by using the NMO equation...

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

GCAGS Transactions

.... Velocity values based on the drilling and geosteering of nine, widely spaced horizontal wells indicates that velocity is faster near the downthrown...

Delineation of Jonah field Using Seismic and Sonic Velocity Interpretations

Ronald C. Surdam, John Robinson, Zun Sheng Jiao, Nicholas K. Boyd III

Rocky Mountain Association of Geologists

... detail the horizontal and vertical distribution of velocity anomalies associated with Jonah Field. Interpretation of these velocity anomalies...

Mapping with Two-Dimensional Seismic Data: Part 7. Geophysical Methods

I. R. Gordon

AAPG Special Volumes

... that you deem appropriate. OTHER TYPES OF MAPS Velocity Gradient Maps A velocity gradient map is constructed at an intermediate step between...

Abstract: Multiattributes and Seismic Interpretation of Offshore Exploratory Block in Bahrain … A Case Study; #90254 (2016)

Suresh Thampi, Aqeel Ahmed, Yahya Al-Ansari, Ali Shehab, Ahmed Fateh, Anindya Ghosh, and Ghada Almoulani

Search and Discovery.com

... logs show an oil-water contact in the Jurassic Arab zone, which was confirmed by an oil gradient from reservoir pressure points. A quick post drilling...

Seismic Velocity Variations in San Joaquin Valley, California

Walter S. Olson

AAPG Bulletin

... of the horizontal or geographic gradient of velocity. Knowledge of the possible effect has of course been common for a long time. Westby (FOOTNOTE 3...

Seismic Depth Interpretation in Thrustbelts, by Nancy House, #40131 (2004).

Search and Discovery.com

The Preparation of Seismic Depth Maps in Oil Exploration

A. E. Pallister

CSPG Bulletin

... of three components: 1, the velocity gradient across the area; 2, differential erosion on the Paleozoic surface; and 3, actual structure of the reflecting...

Advances in Depth Imaging Technology: Rock Physics Guided Migration of Seismic Data in 3D

Nader C. Dutta, Sherman Yang, Jianchun Dai

Indonesian Petroleum Association

...  Vnmo 1  2 (4) Here, Vh is the horizontal velocity, V0 is the vertical velocity and Vnmo is the surface seismic normal moveout velocity. Further...

ABSTRACT: Deepwater Depositional Phase Diagram: A Strategy for Predicting the Architecture of Deepwater Reservoirs Considering Slope Gradient and Clay Percentage; #90061 (2006)

Tim R. McHargue

Search and Discovery.com

... and then to erosional bypass; this is predicted by a leftward, horizontal path through the diagram. Conversely, the effect of decreasing gradient produces...

The identification and cause analysis of abnormal velocity in the western part of Shaleitian Bulge

Zongyu Zhen, Gang Peng, Xuefeng Zhou, Bo Xi

International Meeting for Applied Geoscience and Energy (IMAGE)

... of removing compaction effect in the western segment of Shaleitian Bulge. Then we find that the velocity anomaly has a certain correlation...

Experimental Evaluation of a Generalized Suspended-Sediment Transport Theory

Guy Gelfenbaum, J. Dungan Smith

CSPG Special Publications

... horizontal velocity and thus zero horizontal momentum. Eventually, the particle accelerates until it has the same horizontal velocity as the surrounding...

Chapter Ten-part 2: Depth Conversion

Leslie R. Denham, Dave K. Agarwal

AAPG Special Volumes

... velocity gradient, when all isovelocity surfaces are horizontal. This was first published by Peter Hubral (1977). In other cases, the true position...

Envelope full-waveform inversion of marine seismic data

Kai Xiong, David Lumley, Wei Zhou

International Meeting for Applied Geoscience and Energy (IMAGE)

... Argentina data, such as multi-scale envelope, trace-normalization, and the Rytov-style gradient. In this work, we mainly consider the first and third...