An Interpreter's Guide to Improvements in Depth Imaging through Model-Based Velocity Estimation and Refinement

Andy Furniss

Petroleum Exploration Society of Australia (PESA)

... traveltime curves, whereas stacking velocity inversion conelates the modelled raypath with a hyperbolic traveltime curve implied by the stacking velocity...

Effective Data Denoising and Imaging in the Sanga Sanga PSC Using CRS Approach

Michele Buia, Paolo Marchetti, Amalia Setoputri, Teguh Nugraha

Indonesian Petroleum Association

.... It presents several advantages when compared to conventional stacking methods such as NMO/DMO stack; firstly it uses a traveltime moveout formula...

Structural Features of the Crystalline Basement of the Volgograd Area on the Volga in Connection with Evaluation of the Oil-Gas Prospects of the Devonian Clastics

O. D. Kazantsev, V. N. Khlystova, L. M. Naydis

Petroleum Geology: A Digest of Russian Literature

... basement and constructed from linear traveltime curves: a-surface of the basement of Proterozoic age (provisional); b-surface of the basement of Archean...

Gaining Insight into Formation Anisotropy Using Full Azimuth Imaging and Analysis Tools

Duane Dopkin, Anat Canning, Philip Neri

Petroleum Exploration Society of Australia (PESA)

... Cl :it TravelTime [) C CieomMricals . . . D G PhaseJ\otatio . . . Cl of the dome may be illuminated from only some directions, whi le being...

Mozambique Upper Fan: Origin of Depositional Units

L. Droz, D. Mougenot

AAPG Bulletin

... down-stream region, with a north-south channel flanked by thick (1.5 sec two-way traveltime) asymmetric levees, and a migrating upstream region where...

Pre- and Post-Injection Vertical Seismic Profiling over the Southwest Regional Partnerships Phase II Fruitland Coal CO2 Pilot; #80104 (2010)

Tom Wilson, Les Nutt, Ric Smith, Jitendra Gulati, Marcia Coueslan, Dwight Peters, Art Wells, Craig Hartline, George Koperna, Bill Akwari

Search and Discovery.com

... is complex and reflection discontinuity common. An isopach of the Fruitland sequence (D) reveals considerable variation in traveltime through the Fruitland...

Interpretation of first-arrival times of borehole acoustic measurements acquired in high-angle wells using 3D eikonal numerical simulations

Feiyue Xia, Carlos Torres-Verdín

International Meeting for Applied Geoscience and Energy (IMAGE)

...-time interpretations. Instead, we resort to a ray-tracing technique to simulate the traveltime field of borehole acoustic waves in HA/HZ wells via...

Super-virtual interferometry for noise elimination on vertical seismic profiling (VSP)

Yicheng Zhou, Yang Cui, Sherif Hanafy

International Meeting for Applied Geoscience and Energy (IMAGE)

... it difficult to pick traveltime information, which is used as the input for traveltime tomography to build subsurface velocity models. For this reason...

Leakage Risks Associated with Coal Sequestration in Some Areas of the Central Appalachians: Subsurface, Seismic and Geomechanical Evaluations, by Tom Wilson, Hema Siriwardane, Xiaochao Tang, Brian Connolly, and Jamie Tallman, #80007 (2007).

Search and Discovery.com

Angle Gathers for Gaussian Beam Depth Migration, #41593 (2015).

Samuel Gray

Search and Discovery.com

... by opening angle can be a major challenge for Kirchhoff migration. In cases of moderate structural complexity, the traveltime tables used by Kirchhoff...

The Role of Fault Interaction and Linkage in Controlling Synrift Stratigraphic Sequences: Late Jurassic, Statfjord East Area, Northern North Sea

Nancye H. Dawers and John R. Underhill

AAPG Bulletin

... (color-contoured in two-way traveltime) of horizons offset by the Statfjord East fault. (A) Base Cretaceous horizon, (B) top of the Heather Formation...

Recent Advances in the Characterization of Unconventional Reservoirs with Wide-Azimuth Seismic Data

Ran Bachrach, Colin M. Sayers, Sagnik Dasgupta, Josimar Silva, Stefano Volterrani

Unconventional Resources Technology Conference (URTEC)

... and inverted to generate orthotropic kinematic (traveltime) and dynamic (amplitude) inversion attributes. The wide-azimuth 3D seismic survey targeted the Bakken...

A cross-shape deep Boltzmann machine for petrophysical seismic inversion

Son Dang Phan and Mrinal K. Sen

AAPG Bulletin

... = two-way traveltime. Figure 7. The comparison between reconstructed (black) and real total porosity values that were used to train the network. Notice...

Synthetic Seismic-Reflection Profiles of Rift-Related Structures

Martha O. Withjack , D. J. Drickman Pollock

AAPG Bulletin

... velocities increase with depth, each second of two-way traveltime in the basic seismic section represents a greater distance than the preceding second...

Estimate near-surface velocity with reversals using deep learning and full-waveform inversion

Yong Ma, Xu Ji, Weiguang He, Tong Fei

International Meeting for Applied Geoscience and Energy (IMAGE)

... breaks. Figure 9: Traveltime alignment between field data and synthetic data simulated in the DL+FWI velocity. Figure 7: Training and validation...

Estimation of anisotropic parameters from semblance picking using dynamic programming

Hong Liang, Houzhu (James) Zhang, Dongliang Zhang, Hongwei Liu, Xu Ji

International Meeting for Applied Geoscience and Energy (IMAGE)

... the feasibility. The two-way traveltime in an isotropic medium is given by the following normal moveout equation: Introduction Anisotropy has become...

Beam Migration for Imaging of Complex Structures

Karl Schleicher, John Sherwood, Lynn Comeaux, Mazin Farouki

Indonesian Petroleum Association

... coherent wavelet and this bypasses the multipath traveltime problem encountered with Kirchhoff migration. Also note that BPSDM does not suffer from...

Multi-information intelligent decision process for first-break picking

Fei Luo, Lanlan Yan

International Meeting for Applied Geoscience and Energy (IMAGE)

...-to-noise ratio within a shot gather. The recognition and traveltime detection of the first-arrival wave play a crucial role in estimating velocity...

A Method for Lithogenetic Subdivision of Pannonian (s. l.) Sedimentary Rocks: Chapter 8

A. Szalay, K. Szentgyorgyi

AAPG Special Volumes

... traveltime is also shown. (See location of the borehole in Figure 5.) Fig. 4. Lithologic trend diagram of the Derecske-I borehole and its subdivision...

Chapter Thirteen: 4-D Reservoir Monitoring

Alistair R. Brown

AAPG Special Volumes

... will be a great benefit. Seismic traveltime is less affected by variations in positioning, acquisition or processing than seismic amplitude. So, if the reservoir...

Shelf-Fed Turbidite System Model and its Application to the Oligocene Deposits of the Campos Basin, Brazil

Wagner Elias Peres

AAPG Bulletin

... systems is markedly different. The ES-64 systems appear on the seismic lines as one thick interval (up to 400 ms in two-way traveltime) of reflections...

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...

Abstract: AVAZ Inversion for Anisotropy Parameters of a Fractured Medium; #90174 (2014)

Faranak Mahmoudian, Gary F. Margrave, and Joe Wong

Search and Discovery.com

... in the inversion process. The results for all three anisotropy parameters from AVAZ inversion compared very favourably to those obtained previously by a traveltime...

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

Tianfei Zhu, Yan Yan, and Jon Downton

Search and Discovery.com

.... Each of these refraction branches is described by a linear traveltime segment, and only slopes and intercepts of these traveltime segments are used...

Attributes Assisted Seismic Interpretation in Pre-Stack Time versus Depth Migration Data; #41637 (2015)

Tengfei Lin, Hang Deng, Zhifa Zhan, Zhonghong Wan, Kurt Marfurt

Search and Discovery.com

... with depth. Methodology For the Kirchhoff prestack time migration (PSTM), the total traveltime t is the sum of source to scatter point time...