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8. Interpreting a Structurally Complex Section

8. Interpreting a Structurally Complex Section - GPHY 3423...

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GPHY 3423 Petroleum Geology and Geophysics Interpreting a Structurally Complex Section Kurt J. Marfurt (University of Oklahoma) 8-1
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Learner Objectives After this section you should be able use to a hierarchal interpretation workflow that: Uses easier-to-interpret shallow and deeper horizons to guide more difficult-to-interpret features Uses the tectonic deformation style to constrain alternative seismic interpretations 8-2
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1 Examine the section 2 Add geological and borehole information 3 Interpret large faults and basement formation tops 4 Interpret additional formation tops across the section 5 Identify and solve interpretation challenges. 6 Use reflection character where continuity decreases 7 Interpret the zone of interest 8 Add finishing touches to the section Eight steps to interpretation (a very good work flow for grids of 2-D lines) (Lines and Newrick, 2004) 8-3
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Uninterpreted Shaw Basing seismic section. 1. Examine the section (Lines and Newrick, 2004) 8-4
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Seismic section with WellA and WellB tops. The back thrust is interpreted. 2. Add geological and borehole information. (Lines and Newrick, 2004) 8-5
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Horizon tops for Well A and Well B. Well Horizontal Distance TWTT Formation Top Well A 9 km 1350 ms Belly River Well A 9 km 1475 ms Wapiabi Well A 9 km 1600 ms Bad Heart Well A 9 km 1650 ms Cardium Well A 9 km 2000 ms Mannville Well A 9 km 2780 ms Eldon Well B 5.85 km 600 ms Belly River Well B 5.80 km 825 ms Wapiabi Well B 5.70 km 1050 ms Bad Heart Well B 5.65 km 1150 ms Cardium (Lines and Newrick, 2004) 8-6
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Seismic section with horizons partially interpreted. The boxes indicate areas of more difficult interpretation, and are shown in more detail in the following figures . 3. Interpret large faults and basement formation tops. (Lines and Newrick, 2004) 8-7
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Seismic section with horizons partially interpreted. The boxes indicate areas of more difficult interpretation, and are shown in more detail in the following figures .
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