Wave-Equation-Based Target-Oriented Inversion for Reservoir Characterisation, #41759 (2016).

Dries Gisolf, P.R. Haffinger, P. Doulgeris

Search and Discovery.com

... and primary reflections only, is linear modelling. • Wave-equation based modelling, with propagation in the full medium, transmission effects, multiple...

Abstract: Turning-Ray Tomography and Tomostatics; #90224 (2015)

Babatunde Arenrin, Gary Margrave, and John Bancroft

Search and Discovery.com

... (FWI), wave equation datuming and prestack depth migration. In this research, we apply turning-ray tomography to the statics problem of the Hussar 2D...

Prediction and Analysis of Geomechanical Properties of the Upper Bakken Shale Using Artificial Intelligence and Data Mining

George K. Parapuram, Mehdi Mokhtari, Jalel Ben Hmida

Unconventional Resources Technology Conference (URTEC)

... as the input and shear wave velocity as the output. Initially, the conventional well logs used were Depth, Gamma Ray (GR), and Bulk Density (RHOB...

A Comparison of the Various Methods of Dip Migration

H. Bruce Mayo

Oklahoma City Geological Society

... described by Mr. Stones in his paper. It incorporates the curved ray path theory and uses the linear increase with depth velocity function. When...

NMO Application in VTI Media: Effective and Intrinsic Eta (Geophysics Paper 6)

Joel Starr, Maz Farouki

Geological Society of Malaysia (GSM)

... and velocity in a CMP gather. NMO equations approximate the time shift which would be computed by tracing a ray through a horizontally layered Earth. A few...

Abstract: Evaluation of the Potential of Wave Equation Depth Imaging Technologies on Land, by Morgan P.Brown and Joseph H. Higginbotham; #90076 (2008)

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Recent Applications of Turning

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Wave scattering by the formation velocity perturbation surrounding a fluid-filled borehole

Zhou-Tuo Wei

International Meeting for Applied Geoscience and Energy (IMAGE)

.... Figure 1: Geometry of scattered ray caused from acoustic velocity disturbance in a near-borehole formation. (a) The actual borehole source-receiver...

Wave-equation based amplitude versus offset inversion in long time windows, with time-variant wavelets

Dries Gisolf, Peter R. Haffinger

International Meeting for Applied Geoscience and Energy (IMAGE)

..., or horizontal slowness, by ray-tracing through a stratified overburden velocity model. Once the horizontal slownesses are known, the migrated image...

Seismic Foldout: The Most Advanced Datasets Offshore Barbados and T&T

Jeniffer Masi, Jeroen Hoogeveen, Nick Tanushev, John Walker, Alexander Mihai Popovici, Geoex MCG, Z-Terra

GEO ExPro Magazine

... using the velocity to obtain a velocity correction along the ray trajectory. This correction is the residual for the tomographic equation...

Volume-constrain first arrival tomography based near surface modeling and its application

Naijian Wang, Zhihui Yan, Qingpo Ma, Wei Wu, Yunfei Zu, Yonggui Hu

International Meeting for Applied Geoscience and Energy (IMAGE)

... processing in time domain, the static corrections calculated with depth-velocity curve or refraction method could usually achieve good results. By converting...

Integrated Full Waveform Inversion and Dip Constrained Tomography for Complex Carbonate Imaging - Case Study from Indonesia

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

Indonesian Petroleum Association

... resolution depth velocity model. Kirchhoff PSDM is a ray-based migration and has difficulty in handling sharp velocity boundaries. Multi-arrivals...

Slide Rule Seismic Computations

Robert H. Mansfield

Oklahoma City Geological Society

... a wide range of possible velocity functions. The circular ray path obtained by using a linear increase of velocity with depth provides a rather accurate...

Abstract: Seismic Imaging of Imbricate Structures in Mountainous Area: Case Studies; #90211 (2015)

Nanxun Dai, Oz Yilmaz, Weizhong Wang, and Jie Zhang

Search and Discovery.com

... and the substratum model is estimated by half-space velocity analysis. (4) The subsurface image is obtained by wave equation based prestack depth...

Measuring Behind Casing Water Flow

T. M. Williams

Indonesian Petroleum Association

... to measure vertical water flow in or behind multiple casings. This logging system can measure: • the direction of flow • the linear flow velocity...

Combined Diving Wave Refraction Tomography and Reflection Tomography for PSDM Velocity Model Building (Bekapai Field, Indonesia)

Andi Kusuma, Florent Bertini, Jacques Bonnafe, Artem Sazykin, Swee Leng Ng

Indonesian Petroleum Association

... of arrival times from shot to receivers via ray tracing, to build linear equations 4. Solving a linear system of equations for velocity update from...

Sonic velocity, submarine canyons, and burial diagenesis in Oligocene-Holocene cool-water carbonates, Gippsland Basin, southeast Australia

Malcolm W. Wallace, Guy R. Holdgate, Jim Daniels, Stephen J. Gallagher, Andrew Smith

AAPG Bulletin

...), sonic velocity increases in a linear fashion with depth (Figure 5). Figure 5. Gamma-ray, carbonate content, and sonic velocity for the Kingfish 5...

Broadband Least-Squares Wave-Equation Migration

Shaoping Lu, Andrew Long, Alejandro Valenciano, Nizar Chemingui

Petroleum Exploration Society of Australia (PESA)

...), and the earth properties at the reflector depth and the overburden (velocity, attenuation). Some of these conditions can be mitigated during acquisition...

High-precision seismic imaging for complex deep structures in the hydrocarbon exploration using a coherent-stacking-based least-squares migration

Jidong Yang, Jianping Huang, Tengfei Lin, Zhenchun Li, and Liang Chen

AAPG Bulletin

... of seismic waves at great depth, the constraint for deep and ultradeep velocity is not good in traditional ray-based tomography. Two strategies can...

Abstract: Velocity Model Building with Weighted Linearized Inversion … A VSP Data Case Study; #90187 (2014)

Mingyu Zhang, Richard Kuzmiski, and Zhengsheng Yao

Search and Discovery.com

... and velocity model is not linear while equation (1) is a linearized inversion. The initial model is a 1D velocity model that is inverted by near offset...

Fast and efficient structure-oriented preconditioning with on-the-fly dip estimation

Rodrigo Felicio Fuck, Lorenzo Casasanta

International Meeting for Applied Geoscience and Energy (IMAGE)

... for the guided filter linear operator, Lg. Indeed, starting from line 8 of Algorithm 1, one may write We further simplify equation 4 by realizing...

The SDP Dip Plotter

W. S. Hawes

Oklahoma City Geological Society

... of velocity with depth is present. Figure 2 shows the form for the classical case of linear increase of velocity with depth. This, of course, is the type...

Time-Lapse Refraction Seismic I: A Complementary Monitoring Method?

Martin Landrø, Lasse Amundsen

GEO ExPro Magazine

... diving waves in a medium where the velocity increases linearly with depth. energy is sent back to the surface at the critical V0 = 2,000 m/s and two...

A depth uncertainty estimation method using interval-domain anisotropic VTI velocity and travel time detectability criterion

Andrey H. Shabelansky, Cory J. Hoelting, Min Yang, Sizhuang Deng, Jinsong Chen

International Meeting for Applied Geoscience and Energy (IMAGE)

... ) and zlow (x, y, zref ) are obtained respectively from equations 8b and 8c by linear conversion from time to the reference depth. Equation 9 is one...

Abstract: A Universal Equation to Calculate Shale Volume for Shaly-Sands and Carbonate Reservoirs; #90255 (2017)

David Soto, Rodolfo Soto, Oliver Pasquel, Duarry Arteaga, Johathan Soto

Search and Discovery.com

.... All non-linear relationships are more optimistic in that they produce a shale volume value lower than that from the linear equation. On the other hand...