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Porosity dependence on temperature: Limits on maximum possible effect
6A
Permeability and capillarity 781052 WATER ZONE PROPAGATING THROUGH A PERMEABLE ROCK Rehbinder, G Rock Mech, V9, Nh, July 1977, P245-253 A one-dimensional front of a water zone penetrating an initially dry permeable medium is studied theoretically as well as experimentally. The theory includes the case when the permeability varies with position. Simple experiment and theory show that the front of the water zone increases as the square root of .time if the permeability is constant. A method is suggested to measure the non-constant permeability by measuring the penetration rate.
781053
POROSITY DEPENDENCE ON TEMP~qATURE: LIMITS ON MAXIMUM PoSSIBLEEFFECT Stephenson, L P Am Ass Petrol Geol Bull, V61, N3, March 1977, P407-415 Draws attention to a fundamental quantitative restriction on temperature's role in porosity reduction during compaction. For any given rock type (i.e., given initial mineral compostion, texture etc. ), an observation of the natural porosity-depth curve corresponding to a known temperature-depth curve makes it possible to establish the ma~immn change in the porosity-depth curve that may be attributed to a given change in the temperature distribution, all other factors remaining constant. Although this does not tell us how porosity depends on temperature, it does give us a necessary (but not sufficient) constraint which must be satisfied by the unknown dependence on temperature.
781054 EXPERIMENTAL STUDY OF FRACTURE PERMEABILITY IN POROUS ROCK Nelson, R A; Handin, J Am Ass Petrol Geol Bull, V61, N2, Feb 1977, P227-236 Laboratory experiments of the effect of temperature and confining pressure on permeability in NavaJo Sandstone indicate that simulated fractures in porous rock (i) have a higher percentage rate of permeability decline with depth than whole rock, (2) experience a greater degree of permanent deformation with depth than whole rock, (3) are healed effectively when fracture permeability approaches that of the whole rock, and (4) experience a reduction in permeability dependent on the macroscopic ductility and previous m~ximum depth of burial of the host sandstone. 781055 FLOW THROUGH POROUS MEDIA. EXAMINATION OF THE [MMOBILE FLUIDMODEL Harris, C C Power Technol, V17, N3, Aug 1977, P235-252 Discusses a model which postulates that during permeation a fraction of the interstitial fluid maynot Join in the general flow and applies it to some data from aqueous systems.
.Compressibility, swelling and consolidation 781056 PROBABILISTIC ONE-DIMENSIONAL CONSOLIDATION Freeze, R A J Geotech ~b4~ng Div ASCE, VI03, NGT7, 1977 P725-742
A Monte Carlo approach is used to obtain solutions to hypothetical one-dimensional problems in which the soil properties are generated stochastically. Standard deviations associated with input soil properties in heterogeneous soils can lead to large uncertainties in l~edicted hydraulic head values and consolidation rates. 781057 CONSTITUTIVE RTELATIONS fOR VOLUME CHANGE IN UNSATURATED SOILS Fredlund 3 D G; ~brgenstern, N 19 Can Geoteeh J, VI3, N3, Aug 1976, P261-276
Dynamic properties 781058 FREQUENCY DEPenDENCE OF ELASTICITY OF ROCK _ TEST OF SEISMIC VELOCITY DISPERSION Brennan, B J; Stacey, F D Nature, V268, N5617, 21 July 197T, P220-222 Reports investigations of the rigidity moduli of basalt and granite and discusses how the results affect the development of esrth models. 781059 FATIGUE-LIFE PREDICTION USINg] LOCAL STRESS. STRAIN CONCEA°TS Socie, D F Exp Mech, VIT, N2, Feb 1977, P50-56 Presents and discusses a compuber algorithm for cumulative fatigue damage. Accurate determination of local stresses ~ d strains is necessary. 731060 S H K ~ W~VE VELOCITY VERSUS D ~ T H IN M ~ I N E SEDIMENTS: A REVIEW Hm~ilton, E L Log Analyst, vIS, NI, Jan-Feb 1977, P33-40 781061 MEASUREMenTS OF THai LONGITUDINAL MODULUS OF PIERRE CLAY SHALE AT VARflNG STRAIN RATES Bless 3 S J; Ahrens, T J Geophysics, V42, NI, Feb 1977, P3h-40 Relates to modelling of the effects of explosive-driven fields of motioa. 781062 SEISM[C A_NISOTROPY INVESTIGATIONS IN THE USSR Chesnokov, Y M; Nevskiy, M V Geophys J R Astr Soc, V49, NI, April 1977, PI15-121 Reviews the sub~ect in 4 sections. (1)Computation of seismic wave fields for various models of ~uisot~oplc media. (2)Elastic anisotropy in rock samples. (3)Experimental investigations of seismic anisotropy in the upper part of the crust. (4)Theoretical studies of the lower crust and upper mantle. 23 refs. 781063 SEISMIC ANISOTRoPY AS MEASURED UNDER HII~H-PRESSURE, HIGH-TEMPERATURE CONDITIONS Meissner, R; Fakhiml, M; Geophys, J R Astr Soc, V49, N1, April 1977, P133-143 Field obserwations a~e reviewed and comps2ed with P wave velocity data on 4 types of crustal and uppe~ mantle rocks at pressures up to 6 kbar and temperat~es up to 500C. It is concluded that anisotrop/ caused by preferred orientation of minerals must be expected in the whole lithosphere. Addltions.l effects of layering, cracks and non,hydrostatic stresses S~e estimated.
Permeability and capillarity 781052 WATER ZONE PROPAGATING THROUGH A PERMEABLE ROCK Rehbinder, G Rock Mech, V9, Nh, July 1977, P245-253 A one-dimensional front of a water zone penetrating an initially dry permeable medium is studied theoretically as well as experimentally. The theory includes the case when the permeability varies with position. Simple experiment and theory show that the front of the water zone increases as the square root of .time if the permeability is constant. A method is suggested to measure the non-constant permeability by measuring the penetration rate.
781053
POROSITY DEPENDENCE ON TEMP~qATURE: LIMITS ON MAXIMUM PoSSIBLEEFFECT Stephenson, L P Am Ass Petrol Geol Bull, V61, N3, March 1977, P407-415 Draws attention to a fundamental quantitative restriction on temperature's role in porosity reduction during compaction. For any given rock type (i.e., given initial mineral compostion, texture etc. ), an observation of the natural porosity-depth curve corresponding to a known temperature-depth curve makes it possible to establish the ma~immn change in the porosity-depth curve that may be attributed to a given change in the temperature distribution, all other factors remaining constant. Although this does not tell us how porosity depends on temperature, it does give us a necessary (but not sufficient) constraint which must be satisfied by the unknown dependence on temperature.
781054 EXPERIMENTAL STUDY OF FRACTURE PERMEABILITY IN POROUS ROCK Nelson, R A; Handin, J Am Ass Petrol Geol Bull, V61, N2, Feb 1977, P227-236 Laboratory experiments of the effect of temperature and confining pressure on permeability in NavaJo Sandstone indicate that simulated fractures in porous rock (i) have a higher percentage rate of permeability decline with depth than whole rock, (2) experience a greater degree of permanent deformation with depth than whole rock, (3) are healed effectively when fracture permeability approaches that of the whole rock, and (4) experience a reduction in permeability dependent on the macroscopic ductility and previous m~ximum depth of burial of the host sandstone. 781055 FLOW THROUGH POROUS MEDIA. EXAMINATION OF THE [MMOBILE FLUIDMODEL Harris, C C Power Technol, V17, N3, Aug 1977, P235-252 Discusses a model which postulates that during permeation a fraction of the interstitial fluid maynot Join in the general flow and applies it to some data from aqueous systems.
.Compressibility, swelling and consolidation 781056 PROBABILISTIC ONE-DIMENSIONAL CONSOLIDATION Freeze, R A J Geotech ~b4~ng Div ASCE, VI03, NGT7, 1977 P725-742
A Monte Carlo approach is used to obtain solutions to hypothetical one-dimensional problems in which the soil properties are generated stochastically. Standard deviations associated with input soil properties in heterogeneous soils can lead to large uncertainties in l~edicted hydraulic head values and consolidation rates. 781057 CONSTITUTIVE RTELATIONS fOR VOLUME CHANGE IN UNSATURATED SOILS Fredlund 3 D G; ~brgenstern, N 19 Can Geoteeh J, VI3, N3, Aug 1976, P261-276
Dynamic properties 781058 FREQUENCY DEPenDENCE OF ELASTICITY OF ROCK _ TEST OF SEISMIC VELOCITY DISPERSION Brennan, B J; Stacey, F D Nature, V268, N5617, 21 July 197T, P220-222 Reports investigations of the rigidity moduli of basalt and granite and discusses how the results affect the development of esrth models. 781059 FATIGUE-LIFE PREDICTION USINg] LOCAL STRESS. STRAIN CONCEA°TS Socie, D F Exp Mech, VIT, N2, Feb 1977, P50-56 Presents and discusses a compuber algorithm for cumulative fatigue damage. Accurate determination of local stresses ~ d strains is necessary. 731060 S H K ~ W~VE VELOCITY VERSUS D ~ T H IN M ~ I N E SEDIMENTS: A REVIEW Hm~ilton, E L Log Analyst, vIS, NI, Jan-Feb 1977, P33-40 781061 MEASUREMenTS OF THai LONGITUDINAL MODULUS OF PIERRE CLAY SHALE AT VARflNG STRAIN RATES Bless 3 S J; Ahrens, T J Geophysics, V42, NI, Feb 1977, P3h-40 Relates to modelling of the effects of explosive-driven fields of motioa. 781062 SEISM[C A_NISOTROPY INVESTIGATIONS IN THE USSR Chesnokov, Y M; Nevskiy, M V Geophys J R Astr Soc, V49, NI, April 1977, PI15-121 Reviews the sub~ect in 4 sections. (1)Computation of seismic wave fields for various models of ~uisot~oplc media. (2)Elastic anisotropy in rock samples. (3)Experimental investigations of seismic anisotropy in the upper part of the crust. (4)Theoretical studies of the lower crust and upper mantle. 23 refs. 781063 SEISMIC ANISOTRoPY AS MEASURED UNDER HII~H-PRESSURE, HIGH-TEMPERATURE CONDITIONS Meissner, R; Fakhiml, M; Geophys, J R Astr Soc, V49, N1, April 1977, P133-143 Field obserwations a~e reviewed and comps2ed with P wave velocity data on 4 types of crustal and uppe~ mantle rocks at pressures up to 6 kbar and temperat~es up to 500C. It is concluded that anisotrop/ caused by preferred orientation of minerals must be expected in the whole lithosphere. Addltions.l effects of layering, cracks and non,hydrostatic stresses S~e estimated.