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The AAPG/Datapages Combined Publications Database
Showing 34,457 Results. Searched 200,357 documents.
Basic Seismic Processing: Part 7. Geophysical Methods
Peter M. Duncan
AAPG Special Volumes
... that datum is measured for each source and receiver. The difficulty is in knowing what velocity to use to convert this elevation difference to a time...
1992
Application of Traveltime Tomography and Kirchhoff Migration Methods to Improve the Seismic Cross-Section Resolution on 2D Land Seismic Data
Harmita Lestari, Nur Ayu Anas, Muh. Resky Ariansyah, Sabrianto Aswad, Heri Winarto
Indonesian Petroleum Association
... This process involves automatically NMO and stacking shot gather from floating datum using a constant speed. In this process the scanning velocity...
2019
Abstract: Velocity Updating for Converted-Wave Prestack Time Migration; #90211 (2015)
Xiaogui Miao
Search and Discovery.com
...Abstract: Velocity Updating for Converted-Wave Prestack Time Migration; #90211 (2015) Xiaogui Miao Datapages/Search and Discovery Article #90211 CSPG...
2015
Critical Analysis of Stack Seismic Systems: DISCUSSION
Richard H. Hopkins
AAPG Bulletin
... to parallel the bedding, a fact which would minimize the effect of velocity changes. The effect of changes of interval velocity which cause diversion...
1967
Shallow Seismic Reflection Survey by Using Accelerated Weight Drop as Seismic Source
Alfian Alfian, Rachmat Sule, Awali Priyono, Masami Hato, Takao Aizawa, Alphius Dwi Guntara
Indonesian Petroleum Association
... mid-point) sort Velocity Analysis NMO (normal move-out stretch mute 20%) Bottom mute CMP Stack Display Line-2 Data Loading Geometry DC removal...
2016
AAPG Memoir 76, Chapter 19: The Future of Pressure Prediction Using Geophysical Methods
Alan R. Huffman
AAPG Special Volumes
... approach involves careful smoothing of the stacking-velocity picks before the interval-velocity calculation is performed. Poststack Inversion Poststack...
2001
Chapter Ten-part 2: Depth Conversion
Leslie R. Denham, Dave K. Agarwal
AAPG Special Volumes
... fit” hyperbola is called the “stacking velocity,” because it has the dimensions of velocity (distance divided by time) even though...
2011
Abstract: Converted Wave Receiver Statics from First Break Mode Conversions; #90171 (2013)
Kristof De Meersman and Marcelo Roizman
Search and Discovery.com
... converts to an S-wave at the base of the weathered layer both phases are recorded at surface. The arrival time difference between the two can be used...
2013
Abstract: Converted Wave Receiver Statics from First Break Mode Conversions; #90171 (2013)
Kristof De Meersman and Marcelo Roizman
Search and Discovery.com
... converts to an S-wave at the base of the weathered layer both phases are recorded at surface. The arrival time difference between the two can be used...
2013
Imaging Subsurface Structures Under Gas Clounds by Multi-Component Technology
Xiaogui Miao, Loh Fong Cheen, Libo Zi, Jing Du, Magali Beele, Jacques Bonnafe, Natalia Anggriani, Gilles Vallon, Claudio Strobbia
Indonesian Petroleum Association
.... Large azimuthal variations of time and amplitude are observed, probably due to the sharp lateral velocity variation. VRMS stacking velocity with layer...
2014
Abstract: Structurally-Consistent Interval Velocity Variation with Azimuth; #90187 (2014)
Darren Schmidt, Alicia Veronesi, Chris Davison, and Jeff Durand
Search and Discovery.com
... be corrected (Figure 1b) using the azimuthal NMO equation (Contreras et al., 1999): t 0 zero offset time (sec) 2 t 2 t0 cos 2 sin 2...
2014
Marine Multicomponent Seismic – The New Issues in the Developing Revolution
Jason Robinson
Indonesian Petroleum Association
... are affected. During the stacking process the PS data grouped at a CCP must be split up in time because the CCP location is space and time variant...
2002
Abstracts: True-Amplitude PS Prestack Time Migration via 5D Interpolation; #90173 (2015)
Peter W. Cary, Albert Zhang
Search and Discovery.com
.... Kirchhoff prestack time migration is an ideal tool in converted wave imaging for areas with gentle lateral velocity variation. In areas where...
2015
Application of Offset Seismic Profiles in the Jatibarang Volcanic Reservoir
W. L. Nutt, Jujur Sirait
Indonesian Petroleum Association
... using the velocity function derived from a subsurface model. This NMO correction has the effect of replacing the oblique reflector travel times from...
1985
Mitigation of the 3D Cross-Line Acquisition Footprint Using Separated Wavefield Imaging of Dual-Sensor Streamer Seismic Data A First Example from Malaysia
Mazin Farouki, Andrew Long, Richard Jones, Yee Ah Chim, Magdalene Tang, Hui LeGleut, Shaoping Lu, Dan Whitmore, Adam Betteridge
Indonesian Petroleum Association
... this ‘NMO stretch’. The useful recorded data for a shallow target is therefore limited to smaller offsets (1B) and a narrow cone of penetration...
2013
Pre-Stack Imaging: Time or Depth? (Paper 25)
Carl Notfors, Peter Whiting, Geoff Mansfield
Geological Society of Malaysia (GSM)
... they handle lateral velocity variations. The depth algorithm comprehends any lateral velocity variation whereas the time algorithm assumes local...
2000
Stratigraphic Correlation of Well Logs by Computer Techniques
Albert J. Rudman , Robert W. Lankston
AAPG Bulletin
... as to the effectiveness of the stretch. In effect we must answer the question, "Have we stretched Log 1 the best amount to match Log 2?" In this study...
1973
The Geophysicist Communicating with Seismic Processing
R. E. Sheriff
Southeast Asia Petroleum Exploration Society (SEAPEX)
... indicate the semblance for various stacking velocity values as a function of arrival time. The graphs at the top show the output amplitude...
1980
A Case Study of Seismic Exploration in the Offshore Bonaparte Basin
J. Durrant, A. Young
Petroleum Exploration Society of Australia (PESA)
... to the far group, were recorded. Analogue mixing of far-offset groups had the effect of partially attenuating the low-velocity multiples which exhibit...
1988
Azimuthal Anisotropy A New Interactive Approach Leads to More Accurate Imaging
Graeme Eastwood
Petroleum Exploration Society of Australia (PESA)
... simply picks time and space variant parameters in the same way as picking velocities. Th is is illustrated in Figures 4 and 5. (a) (b) (c) Fig. 4...
2012
A Comparison of Depth Conversion Methods in Buntal Gas Field, Block B, Natuna Sea, Indonesia
Irfan Yuliandri Syukri, John Hughes, Medi Medianesterian
Indonesian Petroleum Association
... methodologies: a linear average velocity-time function, a second order polynomial time-depth function, a V0+KZ approach, and Dix corrected stacking velocities...
2014
Derivation of Seismic Depth Sections
H. Buchholtz, W. Houba
Geological Society of Malaysia (GSM)
... be better identified. One important attribute of the time-migration is its minor sensibility against failure of velocity models. Therefore the stacking...
1987
Relating Seismic Time to Geological Datum: ABSTRACT
James L. Porter
AAPG Bulletin
... the average velocity to the reflecting horizon. When above the datum, the same travel time is calculated at a much lower velocity. The effect is that all...
1960
Refraction Statics, A Comparison Among Processing Contractors
Bambang Sudewo
Indonesian Petroleum Association
... are talking about time shift, the weathered layer velocity and its variation as well as subweathering velocity have to be known. For convenience, we can...
1985
Application of Zero Offset 2D CRS-Stack Method for Low Fold Data: Synthetic and Real Data Examples
R. Sule, A. Hendriyana, P. D. Anggraini, Fatkhan, Alfian, Sardjito, Waluyo, Adriansyah
Indonesian Petroleum Association
... imaging method, which was developed for the first time by WIT-Consortium. Basically, this method is substitution of velocity analysis, NMO/DMO...
2009