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Hydration States of Smectite in NaCl Brines at Elevated Pressures and Temperatures

Published online by Cambridge University Press:  02 April 2024

Virginia Ann Colten*
Affiliation:
Department of Geology, University of Illinois, Urbana, Illinois 61801
*
1Present address: Division of Natural Sciences and Mathematics, St. Mary's College of Maryland, St. Mary's City, Maryland 20686.
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Abstract

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A high-pressure, high-temperature cell was used to monitor the basal X-ray powder diffraction spacing of Na-saturated Cheto montmorillonite in contact with NaCl solutions at temperatures as high as 200°C and hydraulic pressures as high as 6700 psi (456 bar). The 003 and 005 reflections were used to determine d(001) of the smectite. The montmorillonite, in 1 molal NaCl, exhibited a d(001) of 15.4 Å at room temperature and pressure and a d(001) of 15.6–15.7 Å under 500–2200 psi hydraulic pressure. The basal spacing of the clay in 5 molal NaCl was 15.2 Å and 15.33–15.45 Å at 1 bar and 750–6700 psi (53–456 bar), respectively. Because no changes in the basal spacing with increasing temperature to 200°C were detected in any of the experiments, this Na-smectite probably exists as a two-water-layer complex under diagenetic conditions.

Type
Research Article
Copyright
Copyright © 1986, The Clay Minerals Society

References

Bradley, W. F., Grim, R.E. and Clark, G. L., 1937 A study of the behavior of montmorillonite upon wetting Z. Kristallogr. A97 216222.Google Scholar
Burst, J. F., 1969 Diagenesis of gulf coast clayey sediments and its possible relation to petroleum migration Amer. Assoc. Petrol. Geol. Bull. 53 7393.Google Scholar
Colten, V. A., 1985 Experimental determination of smectite hydration states under simulated diagenetic conditions Urbana Univ. of Illinois.Google Scholar
Eberl, D. D., 1980 Alkali cation selectivity and fixation by clay minerals Clays & Clay Minerals 28 161172.CrossRefGoogle Scholar
Farmer, V. C. and Russell, J. D., 1971 Interlayer complexes in layer silicates: the structure of water in lamellar ionic solutions Trans. Farad. Soc. 67 27372749.CrossRefGoogle Scholar
Glaeser, R. and Méring, J., 1968 Homogenous hydration domains of the smectites C.R. Acad. Sci. Paris 267 436466.Google Scholar
Graf, D. L., 1974 X-ray cells for diffraction analysis of flat powder mounts in contact with liquid at elevated temperature and pressure Amer. Mineral. 59 851862.Google Scholar
Hanor, J. S. and Bailey, J. E., 1983 Use of hydraulic head and hydraulic gradient to characterize geopressured sediments and the direction of fluid migration in the Louisiana Gulf Coast Trans. Gulf Coast Assoc. Geol. Soc. 33 115122.Google Scholar
Keren, R. and Shainberg, I., 1975 Water vapor isotherms and heat of immersion of Na/Ca montmorillonite systems—I: homoionic clay Clays & Clay Minerals 23 193200.CrossRefGoogle Scholar
Kharaka, Y. K., Lico, M. S., Wright, V. A., Carothers, W. W., Dorfman, M. H. and Fisher, W. Z., 1979 Geochemistry of formation waters from Pleasant Bayou No. 2 well and adjacent areas in coastal Texas Proc. 4th Geopressured Geothermal Energy Conf., Vol. 1, Austin, Texas, 1979 168193.Google Scholar
van Koster Groos, A. F. and Guggenheim, S., 1984 The effect of pressure on the dehydration of interlayer water in Na-montmorillonite (SWy-1) Amer. Mineral. 69 872879.Google Scholar
Méring, J., 1946 On the hydration of montmorillonite Trans. Farad. Soc. 42B 205219.CrossRefGoogle Scholar
Méring, J., 1949 L’interférence des rayons-X dans les systèmes à stratification désordonnée Acta Crystallogr. 2 371377.CrossRefGoogle Scholar
Norrish, K. and Quirk, J. P., 1954 Crystalline swelling of montmorillonite. Use of electrolytes to control swelling Nature 173 255256.CrossRefGoogle Scholar
Ormerod, E. C. and Newman, A. C. D., 1983 Water sorption on Ca-saturated clays: II. Internal and external surfaces of montmorillonite Clay Miner. 18 289299.CrossRefGoogle Scholar
Perry, E. A. and Hower, J., 1972 Late-stage dehydration in deeply buried pelitic sediments Amer. Assoc. Petrol. Geol. Bull. 56 20132021.Google Scholar
Posner, A. M. and Quirk, J. P., 1964 Changes in basal spacing of montmorillonite in electrolyte solutions J. Coll. Sci. 19 798812.CrossRefGoogle Scholar
Powers, M. C., 1967 Fluid release mechanisms in compacting marine mudrocks and their importance in oil exploration Amer. Assoc. Petrol. Geol. Bull. 51 12401254.Google Scholar
Reynolds, R. C., Brindley, G. W. and Brown, G., 1980 Interstratified clay minerals Crystal Structures of Clay Minerals and Their X-ray Identification London Mineralogical Society 249304.CrossRefGoogle Scholar
Rowland, R. A., Weiss, E. J. and Bradley, W. F., 1956 Dehydration of monoionic montmorillonites Clays and Clay Minerals, Proc. 4th Natl. Conf. 465 8595.Google Scholar
Steinfink, H. and Gebhart, J. E., 1962 Compression apparatus for powder X-ray diffractometry Rev. Sci. Instr. 33 542544.CrossRefGoogle Scholar
Stone, R. L. and Rowland, R. A., 1955 DTA of kaolinite and montmorillonite under water vapor pressures up to six atmospheres Clays and Clay Minerals, Proc. 3rd Natl. Conf., Houston, Texas, 1954 395 103116.Google Scholar
van Olphen, H. and Bradley, W. F., 1963 Compaction of clay sediments in the range of molecular particle distances Clays and Clay Minerals, Proc. New York Pergamon Press 178187.Google Scholar