Seismic Imaging in Anisotropic Media. or... "A Better Way to Moveout and Migrate Long Offset Data"

Rolf Klotz, Martin Bayly, Sue Downie, Swee Leng

Indonesian Petroleum Association

.... A ray passing through a typical sequence of layers that increase in velocity with depth covers more horizontal distance in the deeper layers than...

High-fidelity full-waveform imaging via impedance inversion

Feng Chen, Yu Zhang, Lian Duan, Weishan Han, Yilong Qin, Qianggong Song

International Meeting for Applied Geoscience and Energy (IMAGE)

... designed a simple experiment. We have a linear increasing velocity over the depth to provide us with the turning waves. We also have a density model...

Abstract: Multiple Reflections and Head Waves in Gulf of Suez, by S. N. Domenico; #90963 (1978).

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Abstract: Derivation of Seismic Depth Sections

H. Buchholtz, W. Houba

Geological Society of Malaysia (GSM)

... applying a horizon by horizon migration based on a ray tracing method. The resulting velocity distribution is then used in the wave equation...

The Application of Velocities and Models to Seismic Interpretation

G. Jarrota

Indonesian Petroleum Association

... the velocity within a group of common depth point ray paths assumes that all the ray paths of the group cross the same layers. This assumption fails for some...

Developing a Versatile Method for Rock Physics Modeling in a Carbonate Reservoir by Integrating Rock Mechanic Laboratory Results, Petrophysical Analysis and Computational Rock Physics: A Case Study from The Kais Formation in the Salawati Basin

Al Hafeez, Ananto Wibisono, Rochmad, Khairil Iqbal, Agus Guntoro, Gianita Octavia

Indonesian Petroleum Association

... diagenesis. METHODS By assuming a linear (non linear for limestone) relationship between P- wave velocity (or S-wave) and porosity (as displayed...

ABSTRACT: Seismic Modeling with One-Way Wave Equation, by Jiao, Jianwu; Saleh, Saleh M.; Verschuur, Eric; #90141 (2012)

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Star: Shallow Time Anomaly Replacement

Michael O. Marcoux, Lee Lu

Southeast Asia Petroleum Exploration Society (SEAPEX)

... using wave equation modelling. The results of the ray tracing experiment follow. Model and Synthetic Data The velocity-depth model selected...

Well Log Prediction Using Machine Learning

Sundeep Sharma

Oklahoma City Geological Society

... equation, Vp = 357ρ4 Where Vp is the compressional velocity in ft/s and ρ is the bulk density in g/cc. We can substitute Vp for 106/DT(μs/ft...

ABSTRACT: An Alternative Interpretation of Linear Dipping Events on 2-D Seismic Data from the Wichita Mountains Frontal Zone; #90020 (2003)

Jan M. Dodson, Roger A. Young, Kevin J. Smart

Search and Discovery.com

... combine with large velocity contrasts between Permian sediments and Precambrian basement to give rise to complex seismic ray paths. High-amplitude linear...

Cross-Well Seismology: A New Production Tool

B. N. P. Paulsson, R. T. Langan

Indonesian Petroleum Association

... the depth of sources and receivers in both surveys. In laboratory studies Tosaya et al. (1984) have examined the change in compressional velocity...

Abstract: Subsalt Migration Velocity Analysis with the Common Image Cube Approach, by K. Mansoor, O. Hermant, H. Baudon, S. Warzocha, and M. Van De Rijzen, #90188 (2014)

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Rock Physics Diagnostics as a Prerequisite for Optimal Petrophysics

Akash Mathur, Hilfan Khairy

Indonesian Petroleum Association

... porosity from velocity for majority of the depth intervals here. We observed that even though Wyllietime-average equation could be matched to true density...

Prestack Depth Imaging Within the Makassar Straits, Eastern Kalimantan, Indonesia

Chris Willacy, Suryadi Oemar, A. Edy Hermantoro, Paul Gilleran

Indonesian Petroleum Association

... traveltimes which are used to generate an initial interval velocity via the Dix equation. CRP ray tracing of the velocity model produces synthetic...

High-Resolution Anisotropic Earth Model Building on Conventional Seismic Data Using Full-Waveform Inversion: an Offshore Australia Case Study

Bee Jik Lim, Denes Vigh, Stephen Alwon, Saeeda Hydal, Martin Bayly, Chris Manuel, Dimitri Chagalov, Gary Hampson, Dimitri Bevc

Indonesian Petroleum Association

..., the initial starting model was derived from a smooth version of a reflection traveltime tomography velocity field derived from a depth migration workflow...

Abstract: Regular Grids Travel Time Calculation … A Practical Huygens Wavefront Expansion Approach; #90187 (2014)

Zhengsheng Yao, Mike Galbraith, and Randy Kolesar

Search and Discovery.com

... solution to the eikonal equation formulated in a ray coordinate system. Because it shares the information between rays, unlike ray tracing where...

Abstracts: Near-surface Velocity Model Building and Statics in Permafrost Regions; #90173 (2015)

Tianfei Zhu, Yan Yan, and Jon Downton

Search and Discovery.com

... in the tomography to determine the velocity of the nodes traversed by the ray path of this arrival. As a result, layers with a negative velocity gradient within...

Seismic Anisotropy Modelling and Fluid Substitution for Carbon Dioxide (Co2) Well Storage Project In Carbonate Reservoir

Pebrian Tunggal Prakosa, Thariq Guntoro, Ahmat Dafit Hasim, Okok Wijaya, Yulia Putri Wulandari

Indonesian Petroleum Association

... between P-wave and S-wave velocity, which can be written: (eq.4) This empirical relationship became known as the mud rock equation or the “ARCO mud...

Abstracts: Application of CSP Gather Modeling for Determination of Velocity Smoothing Operator for Prestack Kirchhoff Depth Migration; #90173 (2015)

Hassan Khaniani and John C. Bancroft

Search and Discovery.com

... for the ray based depth migrations. However, for our analysis, we selected a scatter point located at (5500, 2450) m coordination of the Marmousi velocity...

The Suitable Method in Generating True Depth Structure Maps to Eliminate Wonocolo Push-Down Effect on Seismic Data and Its Impact on Prospect Evaluation, North Madura Platform, East Java Basin

Haryono Haryanto, Rizki Krishna Pratama, Riaz Alai, M. Afiq B. Mokhtar, Pongga Wardaya, Yonghe Guo, Jun Wang

Indonesian Petroleum Association

... function method resulted depth structure maps with unsolved push-down effect artifact, as it is not respecting lateral variation of velocity. 3D paleo...

Abstract: Full Waveform Inversion with Phase Encoded Deconvolution Imaging Condition; #90224 (2015)

Wenyong Pan, Kris Innanen, and Gary Margrave

Search and Discovery.com

... of 30Hz. The ray parameter range used for linear phase encoding method is [-0.3s/km, 0.3s/km] with a step of 0.1s/km are tested for comparison. The lowest...

Impact of Pre-Stack Depth Migration on the Anama Prospect, Papuan Foreland Basin

K. Bradey

Papua New Guinea (PNG) Petroleum Convention Proceedings

... which uses ray tracing to avoid the lim itations of the Dix equation. However, stacking velocity analyses were performed at one-kilometre intervals...

Orthorhombic Imaging for Orthogonal Wide Azimuth Surveys in Mississippi Canyon, Gulf of Mexico; #30391 (2014)

Yang He, Adam Gersztenkorn, Sherry Yang, Bin Wang

Search and Discovery.com

... as a linear equation system to minimize the residual moveout of gathers for all azimuths. Checkshots’ travel times can be used by ray tracing...

A Time Migration Before Stack

Richard Cooper, Malcolm Hobson

Geological Society of Malaysia (GSM)

... a more accurate velocity field for migration and depth conversion. The robust nature of the method allows its application to routine data processing...

Structure Interpretation Problems of a Lower Miocene Reef Associated with a Shallow Low Velocity Anomaly, North Sumatra

Peter Walker, Masrizal Maas, Michael D. Burnaman

Indonesian Petroleum Association

..., at the base reef level. These two phenomena, although unconnected are due to the ray path distortion caused by the presence of high velocity reef...