interpreting multicomponent seismic data€¦ · interpreting multicomponent seismic data robert...
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![Page 1: Interpreting Multicomponent Seismic Data€¦ · Interpreting Multicomponent Seismic Data Robert Stewart ... The South Kadi 3C seismic project. Logs, VSP, ... 1.0s 0.5s + 0.5s = 1.0s](https://reader031.vdocuments.mx/reader031/viewer/2022021522/5b91d8dc09d3f2f8508c7e7e/html5/thumbnails/1.jpg)
Interpreting MulticomponentSeismic Data
Robert StewartCREWES Project
University of Calgary
19th Annual CREWES Sponsors MeetingBanff Alberta Nov. 30th, 2007
![Page 2: Interpreting Multicomponent Seismic Data€¦ · Interpreting Multicomponent Seismic Data Robert Stewart ... The South Kadi 3C seismic project. Logs, VSP, ... 1.0s 0.5s + 0.5s = 1.0s](https://reader031.vdocuments.mx/reader031/viewer/2022021522/5b91d8dc09d3f2f8508c7e7e/html5/thumbnails/2.jpg)
The place of applied research
• “If we knew what we were doing, it wouldn’t be called research” Albert Einstein– Curiosity, patience, and nurturing
• Beyond inventing though, we want to innovate and apply – our full CREWES mandate– Focus, structure, results, and assessment
![Page 3: Interpreting Multicomponent Seismic Data€¦ · Interpreting Multicomponent Seismic Data Robert Stewart ... The South Kadi 3C seismic project. Logs, VSP, ... 1.0s 0.5s + 0.5s = 1.0s](https://reader031.vdocuments.mx/reader031/viewer/2022021522/5b91d8dc09d3f2f8508c7e7e/html5/thumbnails/3.jpg)
Interpreting PP and PS data
• Overview of general procedure• Multicomponent software including
Kingdom, Landmark, ProMAX, ProMC, Transform, VISTA/OMNI, WesternGeco, CREWES
• Examples (events & their arrival time)• Summary
![Page 4: Interpreting Multicomponent Seismic Data€¦ · Interpreting Multicomponent Seismic Data Robert Stewart ... The South Kadi 3C seismic project. Logs, VSP, ... 1.0s 0.5s + 0.5s = 1.0s](https://reader031.vdocuments.mx/reader031/viewer/2022021522/5b91d8dc09d3f2f8508c7e7e/html5/thumbnails/4.jpg)
Interpretation work flowP-wave interpretation
• Use logs, synthetics, VSP, sections, volumes to identify horizons & faults, extract amplitudes &
thicknesses, find anomalies
S-wave model• From geology, logs, VSP, empirical, processing, or
gross correlations determine Vs and Tpp to Tps
PS interpretation• Use logs, synthetics, VSP, sections, volumes to pick horizons & faults, amplitudes & thicknesses,
evaluate anisotropy, find anomalies
Joint analysis• Update registration & event matching to extract
Vp/Vs, evaluate differences, undertake joint inversions, highlight interests
Brown, 1998
![Page 5: Interpreting Multicomponent Seismic Data€¦ · Interpreting Multicomponent Seismic Data Robert Stewart ... The South Kadi 3C seismic project. Logs, VSP, ... 1.0s 0.5s + 0.5s = 1.0s](https://reader031.vdocuments.mx/reader031/viewer/2022021522/5b91d8dc09d3f2f8508c7e7e/html5/thumbnails/5.jpg)
Workflow (Dumitrescu, 2007)
1. Correlate P and PS data to wells
2. Pick corresponding horizons on both datasets
3. Registration: use horizon-based matching for PS data to PP time
4. Jointly invert PP and PS data; derive lamba-rho & mu-rho
![Page 6: Interpreting Multicomponent Seismic Data€¦ · Interpreting Multicomponent Seismic Data Robert Stewart ... The South Kadi 3C seismic project. Logs, VSP, ... 1.0s 0.5s + 0.5s = 1.0s](https://reader031.vdocuments.mx/reader031/viewer/2022021522/5b91d8dc09d3f2f8508c7e7e/html5/thumbnails/6.jpg)
Registration: PP and PS data
PP Migration
PS Migration (in PP time)
H 2
H 1
H 2
H 1
Well 1
Well 1
![Page 7: Interpreting Multicomponent Seismic Data€¦ · Interpreting Multicomponent Seismic Data Robert Stewart ... The South Kadi 3C seismic project. Logs, VSP, ... 1.0s 0.5s + 0.5s = 1.0s](https://reader031.vdocuments.mx/reader031/viewer/2022021522/5b91d8dc09d3f2f8508c7e7e/html5/thumbnails/7.jpg)
Registration Workflow (Roth, 2007)PP Seismic PS Seismic
PP Synthetic
PS Synthetic
Co-Visualization
Amplitude EnvelopeBandpass Filter
PP Seismic PS Seismic
Spectral EnhancementFilteringColoured InversionSimilarity
Initial Gamma
ConditionSeismic
Phase Matching
Refined Gamma
ConditionSeismic
![Page 8: Interpreting Multicomponent Seismic Data€¦ · Interpreting Multicomponent Seismic Data Robert Stewart ... The South Kadi 3C seismic project. Logs, VSP, ... 1.0s 0.5s + 0.5s = 1.0s](https://reader031.vdocuments.mx/reader031/viewer/2022021522/5b91d8dc09d3f2f8508c7e7e/html5/thumbnails/8.jpg)
Average Vp/Vs used to stretch PS volume to PP time1.85
2400ms
Courtesy of Sinopec and ION
![Page 9: Interpreting Multicomponent Seismic Data€¦ · Interpreting Multicomponent Seismic Data Robert Stewart ... The South Kadi 3C seismic project. Logs, VSP, ... 1.0s 0.5s + 0.5s = 1.0s](https://reader031.vdocuments.mx/reader031/viewer/2022021522/5b91d8dc09d3f2f8508c7e7e/html5/thumbnails/9.jpg)
Full Wave Shear Impedance Co-rendered with Similarity
Xu2 | Xu3 boundaryF (gas) Sand
T8 horizon with minimum curvature overlay
Xu2 WellsWaterGas F SandGas I Sand
Coals
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4C Interpretation Workflow(Gaiser, 2007 – WesternGeco; GX Technology)
Model expected 4C
signature
Create subsurface model based on
existing data
Design P-wave,S-wave surveys
Provide geologic input into processing
Interpret P-wave,S-wave surveys
Revise, updatevelocity models
Invert datasetsInterpret fluid,
Lithology changes
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CGG-V-HR ProMC
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Two exploration areas of India (with Geofizyka Torun, ONGC
and Oil India)
Assam
(From Niko, 2006)
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The South Kadi 3C seismic project
![Page 14: Interpreting Multicomponent Seismic Data€¦ · Interpreting Multicomponent Seismic Data Robert Stewart ... The South Kadi 3C seismic project. Logs, VSP, ... 1.0s 0.5s + 0.5s = 1.0s](https://reader031.vdocuments.mx/reader031/viewer/2022021522/5b91d8dc09d3f2f8508c7e7e/html5/thumbnails/14.jpg)
Logs, VSP, and section – S. Kadi, India
Vp Density Synth VSP P Section
![Page 15: Interpreting Multicomponent Seismic Data€¦ · Interpreting Multicomponent Seismic Data Robert Stewart ... The South Kadi 3C seismic project. Logs, VSP, ... 1.0s 0.5s + 0.5s = 1.0s](https://reader031.vdocuments.mx/reader031/viewer/2022021522/5b91d8dc09d3f2f8508c7e7e/html5/thumbnails/15.jpg)
P-wave section with Vp/Vs overlain
PS synthetics & correlation
![Page 16: Interpreting Multicomponent Seismic Data€¦ · Interpreting Multicomponent Seismic Data Robert Stewart ... The South Kadi 3C seismic project. Logs, VSP, ... 1.0s 0.5s + 0.5s = 1.0s](https://reader031.vdocuments.mx/reader031/viewer/2022021522/5b91d8dc09d3f2f8508c7e7e/html5/thumbnails/16.jpg)
Sand indicator: Vp/Vs over the OCS-E sand interval
Interpreted sand fairway (yellow) from low Vp/Vs
![Page 17: Interpreting Multicomponent Seismic Data€¦ · Interpreting Multicomponent Seismic Data Robert Stewart ... The South Kadi 3C seismic project. Logs, VSP, ... 1.0s 0.5s + 0.5s = 1.0s](https://reader031.vdocuments.mx/reader031/viewer/2022021522/5b91d8dc09d3f2f8508c7e7e/html5/thumbnails/17.jpg)
Villa Hermosa
Cd del CarmenCantarell
Located 80 kilometers northwest of Ciudad del Carmen, Campeche, Mexico, the Sihil field is the latest discovery (1999) of the five blocks bounded by faults, which make up the super giant Cantarell complex.
Cantarell-Sihil Complex Location
CANTARELL BLOCKS
OILGAS
WATER
KUTZ
AKAL
CHACNOHOCH
0 1 2 KM
N
SIHIL
(Chernikoff, Stewart, & Xu, 2007)
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Cantarell, Mexico Line N-S
0 2.5 5
km
S N
Top Cretaceous
Top Jurassic
Sihil fault
Sub-Sihil fault
TopCretaceous
Top Jurassic
0 2.5 5
km
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PP and PS sections in raw times
2.0s
PS
PP
1.0s 0.5s + 0.5s = 1.0s
0.5s + 1.5s↑= 2.0s
![Page 20: Interpreting Multicomponent Seismic Data€¦ · Interpreting Multicomponent Seismic Data Robert Stewart ... The South Kadi 3C seismic project. Logs, VSP, ... 1.0s 0.5s + 0.5s = 1.0s](https://reader031.vdocuments.mx/reader031/viewer/2022021522/5b91d8dc09d3f2f8508c7e7e/html5/thumbnails/20.jpg)
Summary – Multicomponentseismic interpretation
• Four step process (PP, Vs, PS, happyishcouple)
• Numerous useful applications of PP and PS analysis and interpretation
• Thank you for your attention and support of our research and development work!