1 Welcome and overview of AASPI accomplishments and software development Kurt J. Marfurt Attribute-Assisted Seismic Processing and Interpretation AASPI

2 AASPI 2010 Sponsors

3 Ha Mai– (Ph.D. – Geophysics) – to PetroVietnam Ha Mai– (Ph.D. – Geophysics) – to PetroVietnam Xavier Refunjol (M.S. Geophysics) – to Swift Energy Xavier Refunjol (M.S. Geophysics) – to Swift Energy Victor Pena (M.S. Geophysics) – to BP Victor Pena (M.S. Geophysics) – to BP Rachel Barber (M.S. Geophysics) – to Devon Rachel Barber (M.S. Geophysics) – to Devon Jeremy Fisk (M.S. Geophysics) – now a cowboyJeremy Fisk (M.S. Geophysics) – now a cowboy Marcilio Matos (Visiting scholar) - back home to Rio de Janeiro Marcilio Matos (Visiting scholar) - back home to Rio de Janeiro AASPI 2010 Personnel Changes Araceli Romero (M.S. Geophysics) Araceli Romero (M.S. Geophysics) Nabanita Gupta (Ph.D. Geology) Nabanita Gupta (Ph.D. Geology) Yoryenys del Moro (M.S. Geophysics) Yoryenys del Moro (M.S. Geophysics) Toan Dao (M.S. Geophysics) Toan Dao (M.S. Geophysics) S. “Mike” Gao (M.S. Geophysics) S. “Mike” Gao (M.S. Geophysics) out in Brad Wallet – (Ph.D. – Geophysics) – to Schlumberger Brad Wallet – (Ph.D. – Geophysics) – to Schlumberger Kui Zhang – (Ph.D. Geophysics) – to BGP Kui Zhang – (Ph.D. Geophysics) – to BGP Yanxia Guo – (M.S. Geophysics) – to BGP? Yanxia Guo – (M.S. Geophysics) – to BGP? Amanda Thompson (M.S. Geophysics) – to Devon Amanda Thompson (M.S. Geophysics) – to Devon Oz Elis (M.S. Geophysics - to TPAO Oz Elis (M.S. Geophysics - to TPAO Ana Martins (M.S. Geophysics) – ??? Ana Martins (M.S. Geophysics) – ??? Oz Elis - to TPAO Oz Elis - to TPAO Alejandro Cabrales (M.S. Geophysics) – to PEMEX Alejandro Cabrales (M.S. Geophysics) – to PEMEX going

4 Developed and released the following new attributes Developed and released the following new attributes Reflector convergence Reflector convergence Reflector rotation Reflector rotation Strike of most-positive and negative principal curvatures Strike of most-positive and negative principal curvatures Azimuthal intensity Azimuthal intensity Euler (apparent) curvature Euler (apparent) curvature Principal component analysis of multiple attributes (input to SOM) Prototyped the following new algorithms Prototyped the following new algorithms Azimuthal anisotropy intensity, strike, and confidence Azimuthal anisotropy intensity, strike, and confidence Prestack structure-oriented filtering on migrated gathersPrestack structure-oriented filtering on migrated gathers Constrained least-squares prestack time migration (2D, 3D?)Constrained least-squares prestack time migration (2D, 3D?) Prestack data padding of migrated gathers Prestack data padding of migrated gathers Phase residue mapping of unconformities Phase residue mapping of unconformities Self-organizing maps (most in Fortran90, some still in Matlab) Self-organizing maps (most in Fortran90, some still in Matlab) Improved the following existing algorithms Improved the following existing algorithms Spectral decomposition (improved performance) Spectral decomposition (improved performance) Structure-oriented filtering with spectral bands Structure-oriented filtering with spectral bands Rose diagrams (now reads in principal curvatures and strikes) Rose diagrams (now reads in principal curvatures and strikes) AASPI 2010 Software Development

5 Use of acoustic impedance in AVAz analysis (Kui Zhang) Use of acoustic impedance in AVAz analysis (Kui Zhang) 2 nd derivatives (“curvature”) of acoustic impedance for fracture identification (Yanxia Guo) 2 nd derivatives (“curvature”) of acoustic impedance for fracture identification (Yanxia Guo) Calibration of curvature anomalies with outcrop analogues and image logs (Evan Staples) Calibration of curvature anomalies with outcrop analogues and image logs (Evan Staples) Correlation of production with fracture lineaments (Kui Zhang and Yanxia Guo) Correlation of production with fracture lineaments (Kui Zhang and Yanxia Guo) Correlation of P-wave anisotropy with induced fractures (Amanda Thompson and Kui Zhang) Correlation of P-wave anisotropy with induced fractures (Amanda Thompson and Kui Zhang) Correlation of attributes with sequence stratigraphy (Supratik Sarkar) Correlation of attributes with sequence stratigraphy (Supratik Sarkar) Correlation of microseismic with impedance (Xavier Refunjol) Correlation of microseismic with impedance (Xavier Refunjol) AASPI 2010 Workflow Development

6 AASPI Software

7

8 Representative flow chart

9 5/11/2010curvature3d_new significant rewrite of the earlier curvature3d. All derivatives are now computed using a full 3D rather than 2D operator (for curvature) and 1D operator (for angular unconformities). To achieve efficient implementation, these operators are applied as multiplications in the vertical (time or depth) domain, as as convolutions in the space (x, y) domain. Files containing these operators for QC are also generated. Because of the greater number of samples involved, the results are smoother, such that the previous curvature3d value of alpha=0.25 now corresponds in curvature3d_new to a value of alpha= /11/2010curvature3d_new azimuth of minimum curvature now computed along the dipping plane, and then projected onto the x-y plane as defined in the SEG abstract by Rich 2009 Jamie Rich, Devon Energy 5/11/2010curvature3d_new azimuth of maximum curvature also computed along the dipping plane, and then projected onto the x-y plane as defined in the SEG abstract by Rich Previously, this attribute was not computed, since it was not independent (always perpendicular) to the previously naive computation of the azimuth of minimum curvature. The azimuth of maximum curvature remains perpendicular to the azimuth of minimum curvature in the dipping plane of the analysis point, but its projection on the x-y plane, will no longer be perpendicular except for flat dips. Jamie Rich, Devon Energy 5/11/2010curvature3d_new rotation of reflector rotation now done in a 3D sense about the normal to the average dip within the analysis window. 5/11/2010curvature3d_new the earlier (crude) 1D estimate of angular unconformities have been replaced by a more robust computation using the new 3D operators. The new attributes are inline_convergence, crossline_convergence, convergence_mag, and convergence_azim. These latter two attributes can be effectively plotted using program hlplot. 5/11/2010euler_curvature a new application allowing generation of 'apparent' curvature at any user-defined azimuths. Currently, multiple output volumes are generated. 5/11/2010apparent_cmpt a new application allowing generation of 'apparent' dip or apparent amplitude gradient at user- defined azimuths. Currently, multiple output volumes are generated. 5/11/2010sof3d_new a new implementation of structure-oriented filtering that allows the user to define a suite of overlapping spectral pass-bands. Each pass-band undergoes structure-oriented filtering before reconstructing the filtered output. Optionally, the windowed rms amplitude of the output passbands can be balanced to approximate those of the input passbands using a traditional prewhitening value. This workflow mimicks that described by Helmore (2009) in his SEG expanded abstract paper. 5/11/2010image_filt3dnow runs under MPI 5/11/2010image_filt3d now applies the same kind of filters to the input confidence file, providing an updated estimate of the confidence in the dip estimates. 6/1/2010aaspi_utilallow user-preference on pdf viewer of help files (was hard-coded to be gnupdf)Kevin Woller, Pioneer 7/1/2010curvature3d (old version) fixed an error in the computation of k_mean. There was a term reading a*(0.0+e**2) that should have read a*(1.0+e**2). This fat thumb error appears to have been there for quite some time. It was not in the curvature3d_new release. Kevin has a very good eye!Kevin Deal, Chevron Bug reporting, fixes and updates

Coherence Principal curvatures Strike of Principal curvatures yes Attributes based on volumetric dip and azimuth 10 Seismic amplitude Inline dipCrossline dip Shape components Lineament volumes Quadratic surface?

N N E S W N E S W N E S W Most-negative principal curvature, k 2 Strike, ψ k strong weak 11

N k2k2 ψ k2 5 km Time (s) Strike modulated by most-negative principal curvature 12 (Seismic data courtesy of Devon Energy)

N Coh Amp Positive Negative 0 Strike vs. k 2 Opacity k2k2 ψ k2 5 km Time (s) Strike modulated by most-negative principal curvature, co-rendered with coherence 13 (Seismic data courtesy of Devon Energy)

Coherence Principal curvatures Strike of Principal curvatures yes Attributes based on volumetric dip and azimuth 14 Seismic amplitude Inline dipCrossline dip Shape componentsLineament volumes Quadratic surface? no Reflector convergence

t=1.1 s Reflector convergence co-rendered with coherence N S EW Coh Amp Positive Negative Time (s) AA’

Reflector convergence co-rendered with coherence t=1.1 s N S EW Coh Amp Positive Negative Time (s) BB’

Reflector convergence co-rendered with coherence N S EW Coh Amp Positive Negative 0 t=1.1 s Time (s) CC’

18 TimePresenter 8:00-9:00CONTINENTAL BREAKFAST 9:00-10:00POSTERS 10:00-11:45Presentations 12:10-13:00LUNCH 13:00-14:15Presentations 14:15-15:45POSTER BREAK 15:45-17:00Presentations 17:00-19:00WINE, BEER, CHEESE AND FEEDBACK Agenda