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Using conventional well logs to estimate richness (view source)
Revision as of 13:15, 18 September 2014
, 13:15, 18 September 2014→Shale response example
==Shale response example==
==Shale response example==
[[file:evaluating-source-rocks_fig6-2.png|300px|thumb|{{figure number|1}}From Meyer and Nederlof.<ref name=Meyerandnederlof_1984>Meyer, B. L., and M. H. Nederlof, 1984, [http://archives.datapages.com/data/bulletns/1984-85/data/pg/0068/0002/0100/0121.htm Identification of source rocks on wireline logs by density/resistivity and sonic transit time/resistivity crossplots]: AAPG Bulletin, v. 68, no. 2, p. 121-129. ''Discusses the principles and application of well log analysis to identify source rocks.''</ref>]]
[[file:evaluating-source-rocks_fig6-2.png|300px|thumb|{{figure number|1}}Composite log of Kimmeridge shale, North Sea. From Meyer and Nederlof.<ref name=Meyerandnederlof_1984>Meyer, B. L., and M. H. Nederlof, 1984, [http://archives.datapages.com/data/bulletns/1984-85/data/pg/0068/0002/0100/0121.htm Identification of source rocks on wireline logs by density/resistivity and sonic transit time/resistivity crossplots]: AAPG Bulletin, v. 68, no. 2, p. 121-129. ''Discusses the principles and application of well log analysis to identify source rocks.''</ref>]]
In [[:file:evaluating-source-rocks_fig6-2.png|Figure 1]], the composite log of Kimmeridge shale, North Sea is a typical log response to a high concentration of organic matter in a shale section. The underlying Heather Formation is very silty. The source rock interval is indicated by dots with dashes through them. Note the high sonic and gamma ray readings and the low density readings. The resistivity log reads only slightly higher than the overlying shale section.
In [[:file:evaluating-source-rocks_fig6-2.png|Figure 1]], the composite log of Kimmeridge shale, North Sea is a typical log response to a high concentration of organic matter in a shale section. The underlying Heather Formation is very silty. The source rock interval is indicated by dots with dashes through them. Note the high sonic and gamma ray readings and the low density readings. The resistivity log reads only slightly higher than the overlying shale section.