Depth Prediction Ahead of the Bit: A Case Study from the Singa-1 Discovery Well, South Sumatra

Mark Crawley, David Ginger

Indonesian Petroleum Association

... that a considerable error bar of over 3,000 ft existed on this depth estimate. Figure 3. Pre-drill depth prognosis and stacking velocity profile indicating...

Calculating Sandstone-Shale Ratios from Growth Normal Fault Dips on Seismic Profiles

R. E. Bischke , J. Suppe

GCAGS Transactions

... possible utilizing our methods. Therefore we have utilized stacking velocities in our depth conversion calculations, which typically contain errors of 10...

Seismic simulations of experimental strata

Lincoln Pratson, Wences Gouveia

AAPG Bulletin

...) deconvolving the data, (4) correcting the data for dip-dependent normal moveout, (5) conducting velocity analysis, and (6) stacking the data. Figure...

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

... shallow depth of the Peusangan-XL reef. The stacking problem was solved and the far offset amplitudes exploited. The additional information...

Velocity Analyses of Near Seafloor Strata Based on Multichannel Seismic Data from the Tonga Platform

Jeffrey E. Cole, Dennis M. Mann

Circum Pacific Council Publications

... for the correct stacking of common-depth-point (CDP) data and the production of true-depth sections. The seismic reflection data from the Tonga platform suggested...

Acquisition and Ananlysis of Wide-Angle Reflection and Refraction Seismic Data

Paul L. Stoffa

Circum Pacific Council Publications

... to dip, although this is usually a minor effect when using Common Midpoint data (Diebold and Stoffa, 1981). Another difficulty occurs when velocity...

Seismic velocity detrending and well calibration workflow

Gastón Bejarano Gerke

International Meeting for Applied Geoscience and Energy (IMAGE)

... to borehole data in the process of building velocity models for depth conversion purposes is presented and discussed. Introduction Building velocity...

Investigation of DMO Algorithms during Test-Line Processing: Some Recommendations

Ng Tong San, Mohd. Hashim Abas, Leong Lap Sau

Geological Society of Malaysia (GSM)

... constrained velocity trend is evident in the velocity spectrum after DMO. Figures 2(g) and 2(h) illustrate this effect and reinforces the stacking...

Application of Seismography to Geological Problems

Eugene McDermott

AAPG Bulletin

... alluvial sediments the velocity increases with depth as a result of overburdening. Such a gradual change of velocity has no practical value...

Analytical Approach for Multivariate Exploration Planning via Secondary Migration Modelling

Amin Shokrollahi, Sara Borazjani, Syeda Sara Mobasher, Ulrike Schacht, Khalid Amrouch, Pavel Bedrikovetsky

Australian Petroleum Production & Exploration Association (APPEA) Journal

... presents the effect of water velocity below the migrating hydrocarbon column on the initial and rear fronts’ trajectories. Initial front velocity...

Application of poststack image enhancement with dip-guided selective stacking in southern Gulf of Mexico

Janet Ravelo-Cervantes, Ricardo Francisco Castrejon-Martinez, Julio Cesar Hernandez-Villalobos, Raul Ysaccis, Said Hernandez-Jaramillo, Doan Saavedra-Castaneda

International Meeting for Applied Geoscience and Energy (IMAGE)

...Application of poststack image enhancement with dip-guided selective stacking in southern Gulf of Mexico Janet Ravelo-Cervantes, Ricardo Francisco...

Influence of Lithology and Neogene Uplift on Seismic Velocities in Denmark: Implications for Depth Conversion of Maps

Peter Japsen

AAPG Bulletin

...-depth function for a formation. The variation of the velocity anomaly of the lowermost Jurassic claystones in northern Denmark is interpreted...

Applications of Pre-Stack Migration; Richard Postma; Search and Discovery Article #40029 (2001)

Search and Discovery.com

Reservoir Description by Interferometric Imaging of VSP Data in Transition Zones

Thomas Radford, Martin Karrenbach, Ferry Yustiana, Willi Brianno, Dhea Wachju

Indonesian Petroleum Association

... aspects, we focused on the value of information obtained by using advanced processing flows, such as a 3D depth-tied velocity model construction using...

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

... the effect of carbonate content at shallow depth. Virtually all wells with shallow sonic velocity data show a marked change in gradient at around 300-500 m...

Dipmeter Validity in Deviated Bore Holes: ABSTRACT

Don D. Fitzgerald, J. C. Theriot, P. L. York

AAPG Bulletin

... in the final dipmeter results such that the formation dip magnitude will be erroneous and even the dip direction can be wrong. Errors in relative...

Depth Conversion in the Llanos Basin: Workflow to Reduce Fault Shadow Effect.

Andrew Chermak, Gabriel Veloza Fajardo, Juan Carlos Ramón

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... velocity (Vavg) with depth is to introduce a kink in an otherwise smoothly varying curve as shown in Fig. 3. The effect of this anomalous zone on the seismic...

The Seismic and Geological Definition of a Reef

R. A. Maxwell, W. Thomsen, F. Wilson

Oklahoma City Geological Society

... VELOCITY CURVES FROM DYNAMIC PLOTS Figure 7. INTERVAL VELOCITY COMPARISON End_Page 270------------------------ Figure 8. DEPTH SECTION Figure 9...

Refraction Statics, A Comparison Among Processing Contractors

Bambang Sudewo

Indonesian Petroleum Association

... that sometimes the structural relief at depth cannot be easily separated from the near surface effect. Refraction statics on the other hand, utilizes...

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

... considered to be important for the model (Fig. 7). The initial depth velocity model was built from a Vrms field available from previous time processing...

A Practical Review of Migration Issues and Solutions; #40723 (2011)

Ian F. Jones

Search and Discovery.com

..., the method of velocity model building must be tailored to the type of depth migration algorithm we intend to use. We nowadays commonly have available...

Lithology Prediction by Extrapolating Well Data

Brian Barley, Dean Chergotis, Mai Wilson, Susan Young

Indonesian Petroleum Association

.... For sandstone, limestone, shale and coal, zonal average's of velocity, density and acoustic impedance in ten wells were crossplotted against maximum burial depth...

Current Trends in Geophysics

H. E. Stommel, J. M. Graul

Indonesian Petroleum Association

... data are first separately migrated and then followed by a conventional stack. The effect is elimination of dip dependent velocity prior to stacking...

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...

Dipmeters: Part 4. Wireline Methods

Joseph F. Goetz

AAPG Special Volumes

... somewhat with the computation technique employed. The fact is, at any one depth, more than one true dip exists; which dip is reported is a matter...