Difference between revisions of "Lithofacies analysis"
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− | 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. | + | [[Lithofacies]] are interpreted from well data and [[Basics of seismic facies analysis|seismic facies]] descriptions. Lithofacies interpretations should be based on all available well and outcrop data and on seismic facies interpretations. |
==Procedure== | ==Procedure== | ||
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# Learn as much as possible about the regional geology from well and [http://www.merriam-webster.com/dictionary/outcrop outcrop] control. | # Learn as much as possible about the regional geology from well and [http://www.merriam-webster.com/dictionary/outcrop outcrop] control. | ||
− | # Describe cores and cuttings from sequences of interest. Besides describing lithology, grain size, and sedimentary structures, also describe pore geometry. | + | # Describe [[Core description|cores]] and [[Mudlogging: drill cuttings analysis|cuttings]] from sequences of interest. Besides describing lithology, [[grain size]], and [[sedimentary structures]], also describe [[Pore system fundamentals|pore geometry]]. |
− | # 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 [[Quick-look lithology from logs|well logs]] and outcrops. Annotate logs with [[porosity]] and [[permeability]] data (if available) from potential reservoir and seal intervals. |
− | # 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 stratigraphy|sequence analysis]]. |
− | # 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 sequence definition|depositional sequences]] using log cross sections and seismic sections with seismic facies analyses. |
==See also== | ==See also== |
Revision as of 14:17, 18 November 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.
- Learn as much as possible about the regional geology from well and outcrop control.
- Describe cores and cuttings from sequences of interest. Besides describing lithology, grain size, and sedimentary structures, also describe pore geometry.
- 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.
- Integrate calibrated well logs into well log cross sections constructed during well log sequence analysis.
- 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