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In situ measurements of pore water pressure in soils and concrete constructions
143A 933029 Thermal energy storage in on unconfined aquifer 1. Field injection experiment Palmer, C D; Blowes, D W; Frind, E O; Molson, J W Water Resour Res V28, NIO, Oct 1992, P2845-2856
An experiment is described in which heated water was injected into a shallow aquifer and plume temperatures monitored over 141 days via a dense network of piezometers. Highly detailed data on the three dimensional temperature distribution within the aquifer were acquired, which provide insight into the physical processes of aquifer thermal storage and heat advection, dispersion, retardation, buoyancy, and boundary heat loss. The data will be used to validate a numerical model presented in a companion paper. 933030 1"nermal energy storage in an unconfined aquifer 2. Model development, validation, and applkation Molson, J W; Frind, E O; Palmer, C D Water Resour Res V28, NIO, Oct 1992, 1'2857-2867
A fully three dimensional model of coupled density-dependent fluid flow and heat transfer is presented and validated against field data from the Borden thermal injection experiment. The transport solution is based on a finite element time integration algorithm. Three dimensional deformable block elements are used to accommodate domains with irregular geometry. The model is shown to be a useful tool for modelling low temperature thermal transport problems such as seasonal aquifer thermal energy storage and extraction.
Measurement of water pressure and its effects 933031 In situ measurements of pore water pressure in soils and concrete constructions Kohier, H J, Feddersen, I Proc 3rd International Symposium on Field Measurements in GeomeclmMcs, Oslo, 9-11 September 1991 V1, P107-116. Publ Rotterdam: A A Balkema, 1991
Equipment for monitoring groundwater flow and/or pore pressures should be robust, simple to use and install, and retrievable. Three types of gauge-rubber piston-device are illustrated, which are used installed in 40ram inside-diameter steel tubes, driven to the required depth or installed in specially drilled boreholes. Three examples of their use are presented: monitoring of events in undisturbed soil beneath a riprap revetment and determination of porewater pressure distributions beneath a dam and a canal lock.
Properties of Rocks and Soils Composition, structure texture and density See also: 933215, 933253, 933260 933032 Petrophysical classification of silieinstics for Hthology and porusity prediction from seimnic velocity Vernik, L; Nur, A Bsdl A m Assoc Petrol Geoi V76, N9, Sept 1992, P1295-1309
An extensive database has been assembled of petrophysical measurements at high effective pressure for rock types encountered in clastic sedimentary sequences. Four major petrophysical groups have been distinguished: clean arenites; altered
arenites and arkoses; wackes; and sandy shales. Each group is characterised by distinct mineralogy, texture, and structural position of the clay. P wave velocity-porosity relations for each group are linear with high correlation coefficients. This allows more accurate porosity estimations or lithology predictions from sonic logs than are available from methods neglecting mineralogical and textural factors. I
933033 Computer-assisted tomography: from qualitative visualization to quantitative core analysis Kantzas, A; Marenette, D F Can Pet Teclmol V31, N9, Nov 1992, P48-56
X ray CAT scanning is now routinely used in reservoir rock characterisation and fluid flow visualisation. Algorithms to allow quantitative determination of rock properties such as porosity, bulk density, and bulk mineralogy are introduced. Data are presented from sandpacks, unconsolidated core, sandstones, and carbonate rocks typical of Alberta reservoirs. The performance of the CAT scanner for core analysis is discussed. Bulk density and porosity (except low porosity) values agree well with those from conventional core analysis, but further work is required in the area of measurement of fluid saturation in multiphase flow. 933034 Influence of geological factors on the medumicai properties of basic igneous rocks used as road surface aggregates Brattli, B Engng Geol V33, N1, Sept 1992, P31-44
Relations between impact value, flakiness, and abrasion resistance and geologic parameters have been examined for aggregates of crushed basic rocks, using multiple regression analysis. Mean mineral grain size has the greatest influence on the mechanical strength, the effect being strongest at grain size less than lmm. Mechanical strength is also influenced by mineralogy (amphibolite/pyroxene) and degree of metamorphic alteration. 933035 Decakifl~tion and residual shear streag~ reduction in Fuller's Earth Clay Hawkins, A B; McDonald, C GeoteclmiCue V42, N3, Sept 1992, P453-464
Thirtyone samples were taken at intervals of approximately lm from borehole core through a Fullers Earth succession near Bath. Correlations between Atterberg limits, calcite content, and ultimate residual shear angle were observed. To obtain further detailed information, one bulk homogenised sample was prepared and its geotechnical characteristics studied as it was progressively decalcified in the laboratory. As calcite content decreases and the clay fraction increases, there is a marked reduction in residual shear strength. Calcite content change resulting from dissolution may have important influences on soil mass properties. 933036 Artifact porosity in thin sections of sandstones Pittman, E D J Sediment Petrol V62, N4, July 1992, P734-737
Secondary porosity due to dissolution of framework grains is important to permeability of reservoir sandstones. Its presence is indicated by textural criteria including oversize pores and moldic pores, but such indicators may also result from plucking of grains from the sample surface during sample preparation. Advice is given on careful preparation of thin sections to prevent abrasion artifacts which mimic secondary porosity.
© 1993 Pergamon Press Ltd. Reproduction not permitted
An experiment is described in which heated water was injected into a shallow aquifer and plume temperatures monitored over 141 days via a dense network of piezometers. Highly detailed data on the three dimensional temperature distribution within the aquifer were acquired, which provide insight into the physical processes of aquifer thermal storage and heat advection, dispersion, retardation, buoyancy, and boundary heat loss. The data will be used to validate a numerical model presented in a companion paper. 933030 1"nermal energy storage in an unconfined aquifer 2. Model development, validation, and applkation Molson, J W; Frind, E O; Palmer, C D Water Resour Res V28, NIO, Oct 1992, 1'2857-2867
A fully three dimensional model of coupled density-dependent fluid flow and heat transfer is presented and validated against field data from the Borden thermal injection experiment. The transport solution is based on a finite element time integration algorithm. Three dimensional deformable block elements are used to accommodate domains with irregular geometry. The model is shown to be a useful tool for modelling low temperature thermal transport problems such as seasonal aquifer thermal energy storage and extraction.
Measurement of water pressure and its effects 933031 In situ measurements of pore water pressure in soils and concrete constructions Kohier, H J, Feddersen, I Proc 3rd International Symposium on Field Measurements in GeomeclmMcs, Oslo, 9-11 September 1991 V1, P107-116. Publ Rotterdam: A A Balkema, 1991
Equipment for monitoring groundwater flow and/or pore pressures should be robust, simple to use and install, and retrievable. Three types of gauge-rubber piston-device are illustrated, which are used installed in 40ram inside-diameter steel tubes, driven to the required depth or installed in specially drilled boreholes. Three examples of their use are presented: monitoring of events in undisturbed soil beneath a riprap revetment and determination of porewater pressure distributions beneath a dam and a canal lock.
Properties of Rocks and Soils Composition, structure texture and density See also: 933215, 933253, 933260 933032 Petrophysical classification of silieinstics for Hthology and porusity prediction from seimnic velocity Vernik, L; Nur, A Bsdl A m Assoc Petrol Geoi V76, N9, Sept 1992, P1295-1309
An extensive database has been assembled of petrophysical measurements at high effective pressure for rock types encountered in clastic sedimentary sequences. Four major petrophysical groups have been distinguished: clean arenites; altered
arenites and arkoses; wackes; and sandy shales. Each group is characterised by distinct mineralogy, texture, and structural position of the clay. P wave velocity-porosity relations for each group are linear with high correlation coefficients. This allows more accurate porosity estimations or lithology predictions from sonic logs than are available from methods neglecting mineralogical and textural factors. I
933033 Computer-assisted tomography: from qualitative visualization to quantitative core analysis Kantzas, A; Marenette, D F Can Pet Teclmol V31, N9, Nov 1992, P48-56
X ray CAT scanning is now routinely used in reservoir rock characterisation and fluid flow visualisation. Algorithms to allow quantitative determination of rock properties such as porosity, bulk density, and bulk mineralogy are introduced. Data are presented from sandpacks, unconsolidated core, sandstones, and carbonate rocks typical of Alberta reservoirs. The performance of the CAT scanner for core analysis is discussed. Bulk density and porosity (except low porosity) values agree well with those from conventional core analysis, but further work is required in the area of measurement of fluid saturation in multiphase flow. 933034 Influence of geological factors on the medumicai properties of basic igneous rocks used as road surface aggregates Brattli, B Engng Geol V33, N1, Sept 1992, P31-44
Relations between impact value, flakiness, and abrasion resistance and geologic parameters have been examined for aggregates of crushed basic rocks, using multiple regression analysis. Mean mineral grain size has the greatest influence on the mechanical strength, the effect being strongest at grain size less than lmm. Mechanical strength is also influenced by mineralogy (amphibolite/pyroxene) and degree of metamorphic alteration. 933035 Decakifl~tion and residual shear streag~ reduction in Fuller's Earth Clay Hawkins, A B; McDonald, C GeoteclmiCue V42, N3, Sept 1992, P453-464
Thirtyone samples were taken at intervals of approximately lm from borehole core through a Fullers Earth succession near Bath. Correlations between Atterberg limits, calcite content, and ultimate residual shear angle were observed. To obtain further detailed information, one bulk homogenised sample was prepared and its geotechnical characteristics studied as it was progressively decalcified in the laboratory. As calcite content decreases and the clay fraction increases, there is a marked reduction in residual shear strength. Calcite content change resulting from dissolution may have important influences on soil mass properties. 933036 Artifact porosity in thin sections of sandstones Pittman, E D J Sediment Petrol V62, N4, July 1992, P734-737
Secondary porosity due to dissolution of framework grains is important to permeability of reservoir sandstones. Its presence is indicated by textural criteria including oversize pores and moldic pores, but such indicators may also result from plucking of grains from the sample surface during sample preparation. Advice is given on careful preparation of thin sections to prevent abrasion artifacts which mimic secondary porosity.
© 1993 Pergamon Press Ltd. Reproduction not permitted