Difference between revisions of "Lithofacies analysis"
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{| class = "wikitable" | {| class = "wikitable" | ||
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− | ! Step | + | ! Step || Action |
− | |||
|- | |- | ||
− | | 1 | + | | 1 || Learn as much as possible about the regional geology from well and outcrop control. |
− | | Learn as much as possible about the regional geology from well and outcrop control. | ||
|- | |- | ||
− | | 2 | + | | 2 || Describe cores and cuttings from sequences of interest. Besides describing lithology, grain size, and sedimentary structures, also describe pore geometry. |
− | | Describe cores and cuttings from sequences of interest. Besides describing lithology, grain size, and sedimentary structures, also describe pore geometry. | ||
|- | |- | ||
− | | 3 | + | | 3 || Calibrate core and cuttings descriptions to well logs and outcrops. Annotate logs with [[porosity]] and [[permeability]] data (if available) from potential reservoir and seal intervals. |
− | | Calibrate core and cuttings descriptions to well logs and outcrops. Annotate logs with [[porosity]] and [[permeability]] data (if available) from potential reservoir and seal intervals. | ||
|- | |- | ||
− | | 4 | + | | 4 || Integrate calibrated well logs into well log [[cross section]]s constructed during well log sequence analysis. |
− | | Integrate calibrated well logs into well log [[cross section]]s constructed during well log sequence analysis. | ||
|- | |- | ||
− | | 5 | + | | 5 || Interpret depositional environments of lithofacies of depositional sequences using log cross sections and seismic sections with seismic facies analyses. |
− | | Interpret depositional environments of lithofacies of depositional sequences using log cross sections and seismic sections with seismic facies analyses. | ||
|} | |} | ||
Revision as of 15:50, 22 September 2014
Exploring for Oil and Gas Traps | |
Series | Treatise in Petroleum Geology |
---|---|
Part | Predicting the occurrence of oil and gas traps |
Chapter | Exploring for stratigraphic traps |
Author | John C. Dolson, Mike S. Bahorich, Rick C. Tobin, Edward A. Beaumont, Louis J. Terlikoski, Michael L. Hendricks |
Link | Web page |
Store | AAPG Store |
Lithofacies are interpreted from well data and seismic facies descriptions. Lithofacies interpretations should be based on all available well and outcrop data and on seismic facies interpretations.
Procedure
Below is a suggested procedure for analyzing lithofacies.
Step | Action |
---|---|
1 | Learn as much as possible about the regional geology from well and outcrop control. |
2 | Describe cores and cuttings from sequences of interest. Besides describing lithology, grain size, and sedimentary structures, also describe pore geometry. |
3 | Calibrate core and cuttings descriptions to well logs and outcrops. Annotate logs with porosity and permeability data (if available) from potential reservoir and seal intervals. |
4 | Integrate calibrated well logs into well log cross sections constructed during well log sequence analysis. |
5 | Interpret depositional environments of lithofacies of depositional sequences using log cross sections and seismic sections with seismic facies analyses. |
See also
- Seismic facies analysis
- Basics of seismic facies analysis
- Reflection configuration patterns
- Seismic facies mapping
- Analyzing individual reflectors
- Techniques for enhancing seismic facies analysis
- Petrophysical analysis of lithofacies