Theory of Nuclear Transmission Densitometry Applied to Sedimentology and Geotechnology

Peter V. Meyers, Wesley J. Van Sciver, Adrian F. Richards

Journal of Sedimentary Research (SEPM)

.... The purpose of this paper is to demonstrate that the above corrective methods can be simplified, a linear equation relating the logarithm of the count...

Combining high resolution modelling and one-way wave field extrapolation migration to image beneath a complex overburden: A case study from Porcupine Basin, Ireland

Partha Pratim Mandal, Weidi Koh, Julien Bluteau, David Laws, Jennifer Greenhalgh

Petroleum Exploration Society of Australia (PESA)

... The success of any depth velocity model building (VMB) process depends upon the quality of the input dataset. TECH TALK Figure 1: Map showing location...

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user

Search and Discovery.com

... data sets. The veracity of the determined geologic interval velocity model is tested using prestack depth migration, and also by ng it as the initial...

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user

Search and Discovery.com

... data sets. The veracity of the determined geologic interval velocity model is tested using prestack depth migration, and also by ng it as the initial...

Hybrid Velocity Model Building: 3D Ocean Bottom Cable (OBC) Orthorhombic Full Waveform Inversion (FWI) Depth Imaging of a Complex Geological Structure, Western Berau - Papua, Indonesia

Purbo Santoso, Yayat Supriatna, Tepy Septyana, Leo Tjahjadi, Yonghe Guo

Indonesian Petroleum Association

... depth (well above the reservoir level), restricting where the Orthorhombic FWI can reliably update the velocity model. Ray-based tomography was therefore...

Graphical Techniques for the Analysis and Display of Logging Information: Chapter 2

John H. Doveton

AAPG Special Volumes

... gamma-ray gray-tone intensity images of the Permian-Cretaceous sequence of western Kansas [Abstract]: SEPM 1992 Theme Meeting, Fort Collins, CO, p. 19...

Abstract: To TTI or not to TTI? Semi-Automated 3D Tomographic Velocity Analysis in the Canadian Foothills: A Case History; #90211 (2015)

Sylvestre Charles, David Mitchell, Rob Holt, Jiwu Lin, and John Mathewson

Search and Discovery.com

... study, we evaluate how velocity model building strategy affects imaging in the Canadian Foothills Thrust Belt. Two depth imaging processing techniques...

Stratigraphic Velocity Interpretation: National Petroleum Reserve--Alaska: Chapter 12

E. W. Peikert

AAPG Special Volumes

... velocity data. Well data are used to determine interval velocity versus depth curves which reflect the normal compaction trends for various lithologies...

Combination of Seismic Velocity Gradient and Sonic Gradient Variation as a Hydrocarbon Indicator: A Case Study in Clastic Reservoirs in South Sumatra

Iswani Waryono, Wahyu Triyoso

Indonesian Petroleum Association

.... It is like transforming the CMP data from amplitude to velocity gather. The method is data driven, based on the normal move out equation and by measuring...

Abstract: Azimuthal Simultaneous Elastic Inversion; #90172 (2014)

Jon Downton, Benjamin Roure

Search and Discovery.com

...- and anglelimited seismic traces are modeled using the anisotropic Zoeppritz equation to generate equivalent reflectivity volumes which are then convolved...

Critical Porosity in Understanding Acoustic Porosity Anomalies. A Case Study in Complex Carbonate Reservoir in Indonesia

Aditya Arie Wijaya, Sunawar Kunaifi, Krishna Pratama Laya, Luqman, Dimmas Ramadhan

Indonesian Petroleum Association

... is that the relationship between velocity (1/slowness) and porosity is a linear relationship or fixed against varying rock quality. In the other hand, Prasad (2003...

Seismic Anisotropy Modeling from Well Log in Talang Akar Formation, South Sumatra, Indonesia; #41360 (2014)

Thariq Guntoro, Intan Andriani Putri1, and Dwa Desa Warnana

Search and Discovery.com

... clay volume was extracted from a gamma ray log. By using the AVO equation using anisotropic parameters, the anisotropic seismic model can be determined...

Application of Fullwaveform Tomography to VSP Walkaway Data

Eric Takam Takougang, Youcef Bouzidi

Petroleum Exploration Society of Australia (PESA)

... is necessary to ensure that they can be predicted by the acoustic wave-equation. Figure 1 shows a receiver gather at shallow depth; the presence of what...

Frequency-Domain Waveform Tomography in the Foothills: Velocity Model Estimation with Synthetic Long-Offset Data

Search and Discovery.com

.... Depth imaging is often necessary, and an accurate estimation of the macro-velocity model is essential. Waveform Tomography (i.e., traveltime...

Joint inversion of first-break and early-arrival wave for near surface imaging

Yiming Pan, Kai Zhang, Yipeng Xu, Hailin Wang, Ping Jiang

International Meeting for Applied Geoscience and Energy (IMAGE)

... the velocity stress equation of first-order time is as follows  2 d  x, t , xs  2  t 2 v3 s t   dt  x, t , xs   1    d w  x, t , xs...

Pore Pressure and Elastic Moduli Estimation Considerations for a Simplified Geomechanical Model for Unconventional Plays. A case study in the Vaca Muerta Formation

Sergio Cuervo, Ezequiel Lombardo

Unconventional Resources Technology Conference (URTEC)

... and V0 is the velocity at zero effective stress, in the Bower’s initial equation assumed as 5000 ft/s. A, B are fitting constants. For the velocity...

Abstract: Anisotropic Moment Tensor Inversion and Visualization Applied to a Dual Well Monitoring Survey; #90224 (2015)

Scott Leaney, Xin Yu, Chris Chapman, Les Bennett, Shawn Maxwell, Jim Rutledge, and John Duhault

Search and Discovery.com

...re used for VTI model calibration. One such event is shown in Figure 2 along with the “VMI” (Velocity Model Inversion) interface. Notice the depth- and hence...

Reflection or Refraction?

Aleksandr Nikitin, Nikolay Amelin, Sergei Pokrovskii, Andrey Lekomtsev

GEO ExPro Magazine

... such as ray bending, scattering, diffractions, interference by adjacent reflections in high velocity formations are typical for reflected wave CDP surveys...

Characterization of a Shallow Steamed Oil Reservoir Using Crosswell Seismology

Bjorn N. P. Paulsson, John W. Fairborn

Indonesian Petroleum Association

... velocity Miocene sediments is at a depth of about 1000 feet (Figure 8). It is clear that these crosswell data contain a great deal more information than...

Value of conventional PS-wave velocity analyses for PSDM of deep-water OBS data

James Gaiser, James Simmons, Moacyr de Souza Bezerra

International Meeting for Applied Geoscience and Energy (IMAGE)

... provides a valuable initial S-wave model of the shallow overburden for PS-wave PSDM. used to establish a depth velocity model to perform normal moveout...

Utilizing the Two-Way Wave Equation: Reverse Time Pre-Stack Depth Migration

Matthew H. Karazincir, Clive M. Gerrard, Andrew Long, Lynn B. Comeaux

Indonesian Petroleum Association

...Utilizing the Two-Way Wave Equation: Reverse Time Pre-Stack Depth Migration Matthew H. Karazincir, Clive M. Gerrard, Andrew Long, Lynn B. Comeaux...

The Wave Equation Applied to Migration

D. Loewenthal, L. Lu, R. Roberson, J. Sherwood

Southeast Asia Petroleum Exploration Society (SEAPEX)

... of the relative inaccuracy of our velocity information, we will content ourselves with deriving a function B(x, τ), where the depth variable z has been replaced...

Subsurface seismic imaging using drill bit noise

Mehdi Asgharzadeh, Ashley Grant, Andrej Bona, Milovan Urosevic

Petroleum Exploration Society of Australia (PESA)

... events dipping in the opposite directions at either side of the well. In Figure 4 (b), ground rolls can be identified as linear events with velocity...

Pressure prediction using converted shear waves from OBN data: A rock physics approach

Prajnajyoti Mazumdar, Kevin Searles, Bjorn Olofsson, James Gaiser, Terence Krishnasami

International Meeting for Applied Geoscience and Energy (IMAGE)

..., and composition (vcl) affect seismic velocity and hence a need for estimation of vcl and C44 (or Vs) as a function of depth at seismic scale. Our method...

Abstract: Deterministic Marine Deghosting: Tutorial and Recent Advances; #90224 (2015)

Mike J. Perz and Hassan Masoomzadeh

Search and Discovery.com

... propagating at an angle  from the vertical is given by 2𝑑 cos 𝜃 𝑡𝑑 = , 𝑣 where d is water depth and v is water velocity. Such angle-dependence...