7. The appearance of folds and flexures on seismic data

7. The appearance of folds and flexures on seismic data -...

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
7-1 GPHY 3423 Petroleum Geology and Geophysics Expression of Folds and Faults on Seismic Data Kurt J. Marfurt (University of Oklahoma)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
7-2 Learner Objectives After this section you should be able to: Recognize faults and folds as they appear on vertical and horizontal slices through the seismic amplitude volume Use coherence (variance) to accelerate the interpretation of faults on 3D volumes, Identify the appearance and structural style of salt and shale diapirs on seismic data and attributes, Use curvature to define axial planes, and Use coherence and curvature as an aid to predicting fractures.
Background image of page 2
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
7-5 8-5 Reflector offset – seen on 3D seismic data No reflector offset – probably not seen on 3D seismic data We infer fractures from knowledge of lithology and a structural deformation model Faults and fractures on seismic data
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
7-6 Seismic Amplitude (Data courtesy: OILEXCO, Calgary) Low High Neg Pos 0 (Chopra and Marfurt, 2008) Polygonal faulting (North Sea) Coherence Time slice at 1.240 s Vertical slice
Background image of page 6
7-7 Identification of faults (Gulf of Mexico, USA) Salt Salt
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
7-8 Salt diapir Salt diapir Salt diapir Salt diapir Salt diapir Salt diapir S a l t d i p r Salt diapir u m n g f (Data courtesy of PGS) Coh 1.00 0.75 1 0 Opacity Salt tectonics. Northern Gulf of Mexico Shelf
Background image of page 8
7-9 t=1.3 s Seismic amplitude – Gulf of Mexico shelf Salt diapir Salt diapir Salt diapir Salt diapir Salt diapir S a l t d i p r Salt diapir f u n c e I j o ? (Data courtesy of PGS)
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
7-10 t=1.3 s Seismic amplitude and coherence (Data courtesy of PGS) Salt diapir Salt diapir Salt diapir Salt diapir Salt diapir S a l t d i p r Salt diapir f u n c e I j o ?
Background image of page 10
7-11 t=1.3 s Seismic amplitude and k1 curvature Salt diapir Salt diapir Salt diapir Salt diapir Salt diapir S a l t d i p r Salt diapir f u n c e I j o ?
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 56

7. The appearance of folds and flexures on seismic data -...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online