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→Karst-collapse reservoir model
===Karst-collapse reservoir model===
===Karst-collapse reservoir model===
[[file:carbonate-reservoir-models-facies-diagenesis-and-flow-characterization_fig4.png|thumb|{{figure number|4}}Schematic diagram of the karst-collapse reservoir model showing three karst facies.<ref name=pt06r65>Kerans, C. 1989, Karst-controlled reservoir heterogeneity and an example from the Ellenburger Group (Lower Ordovician) of west Texas: The Univ. of Texas Bureau of Economic Geology Report of Invetigations, n. 186, 40 p.</ref>]]
[[file:carbonate-reservoir-models-facies-diagenesis-and-flow-characterization_fig4.png|thumb|300px|{{figure number|4}}Schematic diagram of the karst-collapse reservoir model showing three karst facies.<ref name=pt06r65>Kerans, C. 1989, Karst-controlled reservoir heterogeneity and an example from the Ellenburger Group (Lower Ordovician) of west Texas: The Univ. of Texas Bureau of Economic Geology Report of Invetigations, n. 186, 40 p.</ref>]]
The [[karst]]-collapse model describes a [[touching vug]] pore system that is formed by massive dissolution of carbonate resulting from [[meteoric groundwater]] flow and subsequent collapse and filling of caverns ([[:file:carbonate-reservoir-models-facies-diagenesis-and-flow-characterization_fig4.png|Figure 4]]). This process is independent of the sediment's original environment of deposition. Most karsted carbonates are thought to be related to major dissolution concentrated in the [[vadose]] and upper [[phreatic]] zones producing a horizontality to the caverns. Cavern geometry is also controlled by fracture orientation, often resulting in caverns with linear trends.
The [[karst]]-collapse model describes a [[touching vug]] pore system that is formed by massive dissolution of carbonate resulting from [[meteoric groundwater]] flow and subsequent collapse and filling of caverns ([[:file:carbonate-reservoir-models-facies-diagenesis-and-flow-characterization_fig4.png|Figure 4]]). This process is independent of the sediment's original environment of deposition. Most karsted carbonates are thought to be related to major dissolution concentrated in the [[vadose]] and upper [[phreatic]] zones producing a horizontality to the caverns. Cavern geometry is also controlled by fracture orientation, often resulting in caverns with linear trends.