MD + AVO Inversion

MD + AVO Inversion Jianhua Yu, University of Utah Jianxing Hu GXT

Outline Motivation Methodology Numerical Tests Conclusions

Seismic Trace G S IncorrectContribution Migration Ellipse Layer 1 Layer 2 Actual reflection point Amplitude Preserved Prestack Migration + AVO Inversion

Migration noise How to deal with above problems? Footprints due to the coarse acquisition geometry Influences on CRG Image

Motivation MD: • Increase CRG spatial resolution • Reduce prestack migration noise and artifacts • Improve AVO attribute inversion

T m’ = Ld L m d = L m but Data Migrated Section Migration Image m’= True Reflectivity Modelm Prestack Migration

T -1 m = (L L ) m’ Migrated Imaage or CRG Reflectivity Deblurring operator Migration Deconvolution

Velocity analysis and velocity estimate for migration in time domain Prestack migration to generate the migrated common offset (CO) sections Processing Steps: Preprocessing : Filtering, amplitude balancing, and demultiple

Apply MD to common offset sections Normal AVO parameter Inversion Apply MD to AVO section Processing Steps:

Outline Motivation Methodology Numerical Tests Synthetic data Field marine data Conclusions

0 0 Mig MD 2.5 2.5 CO (45-55) Section X(km) X(km) 1 5 1 5 CDP 150 Time (s)

0.5 0.5 Mig MD 2.5 2.5 Closeup of COG (45-55) Section X(km) X(km) 1 2 1 2 CDP 150 Time (s)

0.6 0.6 1.8 1.8 Mig MD Closeup of One CDP Gather X(km) X(km) 1 1.8 1 1.8 Time (s)

Spectrums of Mig and MD Images 0.0 0.0 Mig MD 60 60 Trace No. Trace No. 100 110 100 110 CDP 150 Frequency (Hz)

Outline Motivation Methodology Numerical Tests Synthetic data Field data I Conclusions

1.0 1.0 3.0 3.0 Offset (km) Velocity (km/s) 0.26 2.0 1.5 3.5 CDP 150 CDP 150 Time (s)

RMS Amplitudes Shot Number 200 800 -6.0 Offset (km) Raw data -3.5 -6.0 -3.5 After preprocessed

Offset (km) Offset (km) Offset (km) 0.26 0.26 0.26 2.0 2.0 2.0 0.0 3.0 Raw data Demultiple Multiples Time (s)

0.0 0.0 raw data Demultiple 3.0 3.0 Offset (km) Offset (km) 0.26 2.0 0.26 2.0 Time (s)

0.0 0.0 raw data Demultiple AVO ? 3.0 3.0 Offset (km) Offset (km) 0.26 2.0 0.26 2.0 Time (s)

Well Vrms Well Vint Estimated Vrms Comparison of Estimated RMS Velocity and Well Sonic Data Time (s) 0 3 5 Velocity (km/s) 1

Before MD Zone of interest Mig Mig+MD - +2.3 Zone of interest After MD - -3.6 MD Result in Time Domain 13.6 12.1 X (km) 20 7 0 Time (s) 3.5

Crossplot of A and B before MD 0.4 Near Well A B Time interval: 1900-2900 ms -0.4 -0.4 0.4 A

Crossplot of A and B after MD 0.4 Near Well A B Time interval: 1900-2900 ms -0.4 -0.4 0.4 A

Crossplot of A and B Based on Well log from Well 1(from C.-S. Yin, M.L. Batzle, and C. C. Mosher) 0.4 B Depth: 1900-3100 m -0.4 -0.4 0.4 A

After MD Before MD Well Data 0.4 B -0.4 -0.4 0.4 -0.4 A 0.4 -0.4 A 0.4 A

Outline Motivation Methodology Numerical Tests Synthetic data Field data II Conclusions

Amplitude within Geometry Map Shot Number 1 800 177 0.03 Receiver Number 0.005 1

Velocity Scanning of CMP Gathers 0 Time (s) CDP 4600 8 CDP 4750 CDP 4850 CDP 5000 CDP 5500 CDP 6000

Before MD After MD Multiple Multiple CRG before and After MD Offset (km) 0.5 Before MD Time (s) After MD 1.3

AVO Parameter: A*B X (km) 0 15 0 Time (s) 2.0 Before MD

AVO Parameter: A*B X (km) 0 15 0 Time (s) 2.0 After MD

Improves stratigraphyic resolution Attenuate migration noise and artifacts Help to identify lithology anomaly in AVO attribute sections Conclusions

Amplitude fidelity is still explored when designing MD operator Conclusions

Acknowledgments • Thank Alan Leeds for his constructive comments and suggestions. • Thank ChevronTxacoandWesternGeco for providing the data sets • Thank UTAM sponsors for their financial support

MD + AVO Inversion

MD + AVO Inversion

Presentation Transcript

G S Brar MD Dilraj Grewal MD Rajeev Jain, MD SPS Grewal MD

Daniele Tognetto MD, Pia Leon MD, Paolo Cecchini MD, Silvia Rinaldi MD, Giuseppe Ravalico MD

A Kheirkhah MD, A Izadi MD, R Nazari MD H Hashemi MD, M Jabbarvand MD, H Hashemian MD

Dr. S.Chakravarty MBBS, MD MD

Jeffrey Beal, MD Jennifer Janelle, MD Robert Lawrence, MD

Megan Miller MD, Nancy Schindler MD, John Seal MD, Mark Russo MD

Ghasem Fakhraie*, MD, Mahmoud Jabbarvand , MD, Yadollah Eslami , MD,

Ahmet ALANAY, MD Cagatay OZTURK, MD Meric ENERCAN, MD Ibrahim ORNEK, MD Mehmet TEZER, MD

Anil Verma, MD, Jalal Ghali, MD, Alessandra Meris, MD,

Selim Doganay, MD ¹ ; Cem Cankaya, MD ¹ ; Alpay Alkan, MD ²

Hiroo Matsuse, MD; Naoto Shiba, MD; Yoshio Takano, MD;

Azmi HAMZAOGLU, MD Cagatay OZTURK, MD Ahmet ALANAY, MD Mehmet TEZER, MD Selhan KARADERELER, MD

Burcu Oktay MD , Sadık Ardıç MD, Hikmet Firat MD, Erdem Akbal MD, Ramazan Akdemir MD

Giovanni Filocamo MD*, Carmela Zotta MD, Massimo Bisconcin MD

HELVACIOGLU Firat , MD, SENCAN Sadik , MD, OGUZHAN Hasan, MD, YETER Celal, MD

Akiko Masai, MD, Tomoichiro Ogawa, MD Takuya Shiba, MD, Hiroshi Tsuneoka, MD

Osman Akdag, MD Mustafa Sutcu, MD Mustafa Keskin, MD

Daisuke Aizawa,MD Kazutaka Kamiya,MD Tetsuya Ikeda,MD Kimiya Shimizu,MD

Katherine Yulo, MD Ruchi Gupta, MD Renu Gandhe, MD

Don Davis, MD, Peter Ness, MD, Surekha Maddula, MD, Liliana Werner, MD, PhD, Nick Mamalis, MD

Hiroo Matsuse, MD; Naoto Shiba, MD; Yoshio Takano, MD;

Mustafa Serinken MD, Cenker Eken MD, Kamil Tunay MD, Yalcin Golcuk MD

MD + AVO Inversion

MD + AVO Inversion

Presentation Transcript

G S Brar MD Dilraj Grewal MD Rajeev Jain, MD SPS Grewal MD

Daniele Tognetto MD, Pia Leon MD, Paolo Cecchini MD, Silvia Rinaldi MD, Giuseppe Ravalico MD

A Kheirkhah MD, A Izadi MD, R Nazari MD H Hashemi MD, M Jabbarvand MD, H Hashemian MD

Dr. S.Chakravarty MBBS, MD MD

Jeffrey Beal, MD Jennifer Janelle, MD Robert Lawrence, MD

Megan Miller MD, Nancy Schindler MD, John Seal MD, Mark Russo MD

Ghasem Fakhraie*, MD, Mahmoud Jabbarvand , MD, Yadollah Eslami , MD,

Ahmet ALANAY, MD Cagatay OZTURK, MD Meric ENERCAN, MD Ibrahim ORNEK, MD Mehmet TEZER, MD

Anil Verma, MD, Jalal Ghali, MD, Alessandra Meris, MD,

Selim Doganay, MD ¹ ; Cem Cankaya, MD ¹ ; Alpay Alkan, MD ²

Hiroo Matsuse, MD; Naoto Shiba, MD; Yoshio Takano, MD;

Azmi HAMZAOGLU, MD Cagatay OZTURK, MD Ahmet ALANAY, MD Mehmet TEZER, MD Selhan KARADERELER, MD

Burcu Oktay MD , Sadık Ardıç MD, Hikmet Firat MD, Erdem Akbal MD, Ramazan Akdemir MD

Giovanni Filocamo MD*, Carmela Zotta MD**, Massimo Bisconcin MD**

HELVACIOGLU Firat , MD, SENCAN Sadik , MD, OGUZHAN Hasan, MD, YETER Celal, MD

Akiko Masai, MD, Tomoichiro Ogawa, MD Takuya Shiba, MD, Hiroshi Tsuneoka, MD

Osman Akdag, MD Mustafa Sutcu, MD Mustafa Keskin, MD

Daisuke Aizawa,MD Kazutaka Kamiya,MD Tetsuya Ikeda,MD Kimiya Shimizu,MD

Katherine Yulo, MD Ruchi Gupta, MD Renu Gandhe, MD

Don Davis, MD, Peter Ness, MD, Surekha Maddula, MD, Liliana Werner, MD, PhD, Nick Mamalis, MD

Hiroo Matsuse, MD; Naoto Shiba, MD; Yoshio Takano, MD;

Mustafa Serinken MD, Cenker Eken MD, Kamil Tunay MD, Yalcin Golcuk MD

Giovanni Filocamo MD*, Carmela Zotta MD, Massimo Bisconcin MD