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Displacement pressure estimation from pore size (view source)
Revision as of 17:31, 5 February 2014
, 17:31, 5 February 2014→Techniques for estimating r
* Empirical correlation of [[permeability]], [[porosity]], and pore throat radius<ref name=ch10r89>Wardlaw, N., C., Taylor, R., P., 1976, Mercury [[capillary pressure]] curves and the interpretation of pore structure and capillary behavior in reservoir rocks: Canadian Petroleum Geology Bulletin, vol. 24, no. 2, p. 225–262.</ref><ref name=ch10r94>Wells, J., D., Amafuele, J., O., 1985, Capillary pressure and permeability relationships in tight gas sands: SPE/DOE paper 13879.</ref><ref name=ch10r88 /><ref name=ch10r63>Pittman, E., D., 1992, [http://archives.datapages.com/data/bulletns/1992-93/data/pg/0076/0002/0000/0191.htm Relationship of porosity and permeability to various parameters derived from mercury injection-capillary pressure curves for sandstone]: AAPG Bulletin, vol. 76, no. 2, p. 191–198.</ref>
* Empirical correlation of [[permeability]], [[porosity]], and pore throat radius<ref name=ch10r89>Wardlaw, N., C., Taylor, R., P., 1976, Mercury [[capillary pressure]] curves and the interpretation of pore structure and capillary behavior in reservoir rocks: Canadian Petroleum Geology Bulletin, vol. 24, no. 2, p. 225–262.</ref><ref name=ch10r94>Wells, J., D., Amafuele, J., O., 1985, Capillary pressure and permeability relationships in tight gas sands: SPE/DOE paper 13879.</ref><ref name=ch10r88 /><ref name=ch10r63>Pittman, E., D., 1992, [http://archives.datapages.com/data/bulletns/1992-93/data/pg/0076/0002/0000/0191.htm Relationship of porosity and permeability to various parameters derived from mercury injection-capillary pressure curves for sandstone]: AAPG Bulletin, vol. 76, no. 2, p. 191–198.</ref>
Although these methods can estimate the P<sub>d</sub> of sands, they do not apply easily to shales and finer grained rocks that comprise top seals. The assumptions of spherical grains and rhombohedral packing used to infer pore throat radius to not apply to shales that contain plate-like clay minerals.<ref name=ch10r5 />). Nor is the pore-size distribution easily determined from thin sections of fine-grained shales<ref name=ch10r44>Krushin, J., 1993, Entry pore throat size of nonsmectite shales, in Ebanks, J., Kaldi, J., Vavra, C., eds., Seals and Traps: A Multidisciplinary Approach: AAPG Hedberg Research conference, unpublished abstract.</ref> Use of permeability and porosity is thwarted by the lack of a distinct apex in the mercury injection data of low-permeability rocks (<ref name=ch10r63 /> as well as the difficulty of measuring the permeability of shales.
Although these methods can estimate the P<sub>d</sub> of sands, they do not apply easily to shales and finer grained rocks that comprise top seals. The assumptions of spherical grains and rhombohedral packing used to infer pore throat radius to not apply to shales that contain plate-like clay minerals.<ref name=ch10r5 /> Nor is the pore-size distribution easily determined from thin sections of fine-grained shales<ref name=ch10r44>Krushin, J., 1993, Entry pore throat size of nonsmectite shales, in Ebanks, J., Kaldi, J., Vavra, C., eds., Seals and Traps: A Multidisciplinary Approach: AAPG Hedberg Research conference, unpublished abstract.</ref> Use of permeability and porosity is thwarted by the lack of a distinct apex in the mercury injection data of low-permeability rocks<ref name=ch10r63 /> as well as the difficulty of measuring the permeability of shales.
==Theory and experiment==
==Theory and experiment==