Experience with Seismic Lithology (AVO) in Central Sumatra

Jeff Wright, Isdjulaedi Bakri, Budi Subiyanto

Indonesian Petroleum Association

... square fits to time slic amplitudes of the NMO corrected CMP gathers for every time slice. With the use of ray tracing and an input velocity model...

Observations of Azimuthal Anisotropy in Prestack Seismic Data, #41572 (2015).

David Gray

Search and Discovery.com

... the effect of applying the azimuthal velocity correction before stacking the data. The resulting stack shows a significant improvement in signal...

Abstract: Case Study of the Effect of Grid-Search Objective Function in Microseismic Source Location; #90255 (2017)

Luolan Li, Yuyang Tan, Chuan He, Pan Deng

Search and Discovery.com

... of the receiver arrays, the accuracy of the arrival picks and the velocity model. However, the choice of the objective function in grid-search algorithm...

Dip and Azimuth Determination in 3D CRS-Stack

A. Hendriyana, M. Jaya, R. Sule, A.D. Guntara

Indonesian Petroleum Association

... because of the Fresnel effect. Velocity is the only parameter required by conventional stacking. Stacking velocities represent long wavelength part...

Optimised 3D Land Geophysical Survey Design - A Case Study

P. van Baaren

Papua New Guinea (PNG) Petroleum Convention Proceedings

... of 3200m was determined. In Figure 4 the effect of different stretch mutes is shown for a given velocity function. Near offset data are least distorted...

Velocity and Velocity

M. Al-Chalabi

Petroleum Exploration Society of Australia (PESA)

... by using it to 'stretch' the PreSDM data vertically back to time. Optimum depthing can then be achieved by applying the best estimate of the true vertical...

Lateral Changes in Seismic Velocities and Their Effect on Depth Prediction

J. Pinchin, M. Bayly

Petroleum Exploration Society of Australia (PESA)

... that the reason for this is the effect of short wavelength lateral velocity changes upon the stacking velocity determinations. The conclusion is that although...

Seismic Inversion

Michel Kemper

Petroleum Exploration Society of Australia (PESA)

... Gain : 10.0 ... Fl Gain : 5 .0 o'FI Fig. I. Offset gather and angle 'field' obtained from a velocity profile (left) and resulting angle stacks...

Seismic Characterization of the Fiordland Gas-hydrate Province, New Zealand

Miko Fohrmann, Andrew R. Gorman, Ingo A. Pecher

AAPG Special Volumes

..., and S. Stein, 1994, Effect of recent revisions to the geomagnetic reversal time-scale on estimates of current plate motions: Geophysical Research Letters, v...

A Regional Velocity Cube for Depth Conversion on the Northwest Shelf

Maighréad Ní Dheasúna, Mark Ballesteros, James Leven

Petroleum Exploration Society of Australia (PESA)

... generated with lateral grid dimensions of Equation Use Average Velocity: ll Depth Conversion Stacking Velocity: L2 NMO Correction Table 7...

Fundamental 3-D Seismic Survey Design

Stuart Wright

Rocky Mountain Association of Geologists

... NMO within the same cell. This can make stacking the data very difficult. DMO can remove this azimuthally related effect, but in order to apply DMO...

True Amplitude Preserved Multi-Azimuth Pre-Stack Depth Migration for Structural and Reservoir Characterization (Sisi-Nubi Field, Indonesia)

M. Baturin, F. Bertini, J. Bonnafé, A. Riou, S. Birdus, Y. Yin

Indonesian Petroleum Association

... in the shallow interval; these velocity and imagery artifacts were not fully solved by the initial 2004-2005 Pre-Stack Time Migration processing (Fig. 5...

Seismic imaging of the Turtle Mountain structure, southwestern Alberta, Canada

J.H. Isaac, D.C. Lawton, C.W. Langenberg

CSPG Bulletin

... to develop in areas of complex geology. Figure 5. (a) Line A and (b) Line B, poststack time migrated to a datum of 2000 m above sea level. The velocity...

All that wobbles isnt necessarily azimuthal anisotropy

Helen Debenham, Jennifer Badry, Mohamed Megebry

Petroleum Exploration Society of Australia (PESA)

... rather than the depth of present-day burial. Hence there can be large velocity contrasts across these faults. Figure 4 shows the two-way-time (TWT...

Relative inversion for extended elastic impedances

Peter Harris, Kathryn Young

International Meeting for Applied Geoscience and Energy (IMAGE)

... and wavelet stretch from near to far angles due to NMO stretch or differential attenuation, both of which make the gradient even less stable. The extended...

The Use of Modern 3D Seismic Data Processing Techniques, 5D Interpolation, and Anisotropic PSTM to Improve Existing 3D Data in South Louisiana Data—Pulling the Scales from our Eyes; New Truth from Existing Datasets

John Asma, John Stevens, Sukhdev Hyare, Dave Spaulding

GCAGS Transactions

... at shorter offsets tends to reflect the effect of horizontal velocity as expected. Migration was first performed on stacked data. NMO correction...

Water column corrections: Joint water velocity inversion for 4D marine surveys

Didier Lecerf, Mathieu Lange, Andrew Oates, Jyoti Kumar

International Meeting for Applied Geoscience and Energy (IMAGE)

... bottom picks is commonly used to estimate the water velocity for each sail line. The data correction can be performed using dynamic time-shift...

Noise Attenuation in Common Receiver Gather to Enhance S/N Ratio in Seismic Data

Dara Felisia A, Triswan Mardani Ade Surya, R.B.Fauzan Irshadibima, Firman Syaifuddin

Indonesian Petroleum Association

... analysis is performed to get velocity model as input to NMO process and continued with CMP stacking to get seismic stack. Figure 2 is flowchart seismic data...

Anisotropy

Search and Discovery.com

Velocity Anomalies and Out-of-Plane Reflections in Barnicarndy 1, Canning Basin

Y. Zhan

Australian Petroleum Production & Exploration Association (APPEA) Journal

... section has an average velocity of less than 1000 m/s, which is unrealistically slow and probably caused by a systematic time delay in the data...

Revealing the discontinuities by 3D prestack diffraction separation and imaging

Chuangjian Li, Suping Peng, Xiaoqin Cui, Peng Lin

International Meeting for Applied Geoscience and Energy (IMAGE)

.... Method and Theory The NMO velocity is related to the observed direction, which can be regarded as a function with respect to the observed direction β...

A Comparison of Depth-Conversion Methods in the Gulf of Mexico

Melvan D. Carter, Gary R. Hyatt

GCAGS Transactions

... velocity was slightly better than a full-blown seismic-velocity technique for the deepest horizon. Because the conversion of time into depth is done...

Developing a New Technique Through Partnering with Contractors: Reservoir Prediction Utilizing AVO Walkaway VSP Data to Calibrate Surface Seismic Gathers, a Case Study in Indonesia

Patricia L. C. Henderson, Dan Hampson, Scott Leaney, Nigel Smith, John Rice, Dave Boreham

Indonesian Petroleum Association

... × 125M GRID SORTING OF THE EIGHT GROUPS OF 30 FOLD GATHERS INTO 240 FOLD "SUPER GATHER" NMO CORRECTION USING 3D STACKING VELOCITY FIELD RADON...

Quality Data at a Reduced Price: Innovative Approaches in 3-D Acquisition and Processing

Mars E. Semaan, Michel F. Bee, Maryanto, Gerard Dufourd, Eddy A. Sentani

Indonesian Petroleum Association

... divergence correction using the time scaling to the power of 1.6, and a simple brute velocity Exponential gain of 4 dB/s Surface consistent spiking...

Land 3D Acquisition Techniques Related to S.E. Asian Situation

Walter Ritchie

Indonesian Petroleum Association

... the necessity for velocity differences of 2860m/s to 3420m/s for NMO within this CPD set to fully compensate for this effect. Figures 20 to 23...