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Line 19: − The initial solid constituents of a carbonate rock normally determine its initial pore type and geometry and strongly influence diagenesis. Early pore space in carbonate rocks generally has fabric-selective characteristics; creation of late pore space does not.<ref name=ch09r10>Choquette, P., W., Pray, L., C., 1970, Geologic nomenclature and classification of porosity in sedimentary carbonates: AAPG Bulletin, vol. 54, no. 2, p. 207–250. Classic reference for basic concepts regarding carbonate porosity.</ref> Surface and shallow diagenesis mainly occurs in fabric-selective pore geometries that allow the greatest fluid flow (mostly interparticle or intercrystalline). Late-stage shallow diagenesis mainly occurs in nonfabric-selective pore geometries that allow the greatest fluid flow (mostly fracture related). Deep diagenetic processes can be both fabric selective (fluid flow through interparticle or intercrystalline pores) or nonfabric selective (compaction). + +
Carbonate porosity formation and preservation (view source)
Revision as of 17:03, 3 February 2014
, 17:03, 3 February 2014no edit summary
==Diagenesis and rock fabric==
==Diagenesis and rock fabric==
[[file:predicting-reservoir-system-quality-and-performance_fig9-74.png|thumb|{{figure number|1}}Modified.]]
[[file:predicting-reservoir-system-quality-and-performance_fig9-74.png|thumb|{{figure number|1}}Modified.]]
The initial solid constituents of a carbonate rock normally determine its initial pore type and geometry and strongly influence diagenesis. Early pore space in carbonate rocks generally has fabric-selective characteristics; creation of late pore space does not.<ref name=ch09r10>Choquette, P., W., Pray, L., C., 1970, Geologic nomenclature and classification of porosity in sedimentary carbonates: AAPG Bulletin, vol. 54, no. 2, p. 207–250. Classic reference for basic concepts regarding carbonate porosity.</ref> Surface and shallow diagenesis mainly occurs in fabric-selective pore geometries that allow the greatest fluid flow (mostly interparticle or intercrystalline). Late-stage shallow diagenesis mainly occurs in nonfabric-selective pore geometries that allow the greatest fluid flow (mostly fracture related). Deep diagenetic processes can be both fabric selective (fluid flow through interparticle or intercrystalline pores) or nonfabric selective (compaction).
==Fabric and nonfabric selection porosity==
==Fabric and nonfabric selection porosity==