Changes

==Recent developments==

==Recent developments==

An encouraging development is the attempt to establish a relationship between log response and displacement pressure.<ref name=ch10r1>Alger, R. P., D. L. Luffel, and R. B. Truman, 1989, New unified method of integrating core capillary pressure data with well logs: Society of Petroleum Formation Evaluation, vol. 4, no. 2, p. 145–152, DOI: [https://www.onepetro.org/journal-paper/SPE-16793-PA 10.2118/16793-PA].</ref><ref name=ch10r68 /><ref name=ch10r78>Sneider, R. M., and G. Bolger, 1993, Estimating seals from wireline logs of clastic seals and reservoir intervals, in J. Ebanks, J. Kaldi, and C. Vavra, eds., Seals and Traps: A Multidisciplinary Approach: AAPG Hedberg Research conference, unpublished abstract.</ref><ref>Sneider, R. M., and J. Neasham, 1993, Comparison of seal capacity determination (SCD) from cores with SCD’s from cuttings of the same interval, in J. Ebanks, J. Kaldi, and C. Vavra, eds., Seals and Traps: A Multidisciplinary Approach: AAPG Hedberg Research Conference, unpublished abstract.</ref> [[Basic open hole tools#Resistivity|Resistivity logs]] directly reflect the relative proportions of clay minerals and organics to quartz and other minerals. Clay-rich seals with high displacement pressures have low resistivities. Clay-poor rocks with lower displacement pressures have high resistivities.<ref name=ch10r78 />

An encouraging development is the attempt to establish a relationship between log response and displacement pressure.<ref name=ch10r1>Alger, R. P., D. L. Luffel, and R. B. Truman, 1989, New unified method of integrating core capillary pressure data with well logs: Society of Petroleum Formation Evaluation, vol. 4, no. 2, p. 145–152, DOI: [https://www.onepetro.org/journal-paper/SPE-16793-PA 10.2118/16793-PA].</ref><ref name=ch10r68 /><ref name=ch10r78>Sneider, R. M., and G. Bolger, 1993, Estimating seals from wireline logs of clastic seals and reservoir intervals, in J. Ebanks, J. Kaldi, and C. Vavra, eds., Seals and Traps: A Multidisciplinary Approach: AAPG Hedberg Research conference, unpublished abstract.</ref><ref>Sneider, R. M., and J. Neasham, 1993, Comparison of seal capacity determination (SCD) from cores with SCD’s from cuttings of the same interval, in J. Ebanks, J. Kaldi, and C. Vavra, eds., Seals and Traps: A Multidisciplinary Approach: AAPG Hedberg Research Conference, unpublished abstract.</ref> [[Basic open hole tools#Resistivity|Resistivity logs]] directly reflect the relative proportions of clay minerals and organics to [[quartz]] and other minerals. Clay-rich seals with high displacement pressures have low resistivities. Clay-poor rocks with lower displacement pressures have high resistivities.<ref name=ch10r78 />

==See also==

==See also==