The AAPG/Datapages Combined Publications Database
AAPG Bulletin
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AAPG Bulletin; Year: 2025; Issue: July DOI: 10.1306/06132522006
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Figure 12. Various crossplots of the third interval of the Paleogene Shahejie sandstone reservoirs in the Bonan oil field. (A) Crossplot of average grain size versus porosity. (B) Crossplot of Trask sorting index versus porosity. (C) Crossplot of clay content versus porosity. (D) Crossplot of clay content versus porosity loss from compaction (CoPL). (E) Crossplot of clay content versus carbonate cements content. (F) Crossplot of intergranular volume versus cement volume. (G) Crossplot of CoPL versus porosity. (H) Crossplot of porosity loss from cementation (CePL) versus porosity. (I) Crossplot of primary/secondary porosity versus total porosity. All the data in this figure are from point-counting analysis in petrographic observation. cc = carbonate content; IGV = intergranular volume.
Figure 12. Various crossplots of the third interval of the Paleogene Shahejie sandstone reservoirs in the Bonan oil field. (A) Crossplot of average grain size versus porosity. (B) Crossplot of Trask sorting index versus porosity. (C) Crossplot of clay content versus porosity. (D) Crossplot of clay content versus porosity loss from compaction (CoPL). (E) Crossplot of clay content versus carbonate cements content. (F) Crossplot of intergranular volume versus cement volume. (G) Crossplot of CoPL versus porosity. (H) Crossplot of porosity loss from cementation (CePL) versus porosity. (I) Crossplot of primary/secondary porosity versus total porosity. All the data in this figure are from point-counting analysis in petrographic observation. cc = carbonate content; IGV = intergranular volume.