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Moving point techniques
13A 891098 In-situ studies on electrical resistivity and SPT Kate, J M Proc Eighth Asian Regional Conference on Soil Mechanics and Foundation Engineering, Kyoto, 20-24 July 1987 Vl, P5356. Pubi Japan: Japanese Society for Soil Mechanics and Foundation Engineering, 1987
An attempt is made to investigate the relation between SPT N count and true resistivity, to examine the possibility of predicting mechanical properties of subsurface strata from resistivity soundings. The limitations of available interpretative techniques are illustrated and the need to verify their deviations from true values is pointed out. A comparative study of results interpreted by different methods is presented.
Permeability and capillarity
continuum approach is proposed for modelling for field problems. Preliminary testing suggests it is a promising tool for dealing with large scale networks of fractures. 891102 Mathematical modelling of the behavior of hydrocarbon reservoirs - the present and the future Odeh, A S In: Advances in TransportPhenomena in Porous Media, edited by J Bear and M Y Corapciog& P821-848. Publ Dordrecht: Martinus Nijhoff, 1987
The reservoir, its fluids, and its properties are introduced. The components of a reservoir simulator are described, and classes of simulators examined. Reservoir flow equations for a black oil system, and the development of a black oil reservoir simulator are studied. More complicated simulators are described, and physical and mathematical modelling compared. Future developments are discussed.
See also: 891020, 891022 891099 Multiphase flow in fractured reservoirs Torsaeter, O; Kleppe, J; van Goif-Racht, T In: Advances in Transport Phenomena in Porous Media, edited by J Bear and M Y Corapcioglu P553-629. Publ Dordrecht: Martinus Nijhoff, 1987
A review of the current knowledge of multiphase flow in fractured reservoirs is presented. Physical properties of fractured rocks are first discussed, followed by field and laboratory tests and mathematical simulations of the imbibition process. The state of the art in modelling of multiphase flow in naturally fractured reservoirs, considering flow equations and matrix/fluid exchange, is then examined. An improved dual porosity model for simulation of multiphase flow in fractured reservoirs is discussed. 891 I00 Stochastic analysis of solute transport in saturated and unsaturated media Gelhar, L W In: Advances in Transport Phenomena in Porous Media, edited by J Bear and M Y Corapcioglu P659-700. Publ Dordrecht: Martinus Nijhoff, 1987
Many practical problems of subsurface flow require predictions for large time and space scales in earth materials which are naturally inhomogeneous. One approach is to treat this inhomogeneity in a stochastic sense. Flow or hansport problems can be expressed in terms of probability distributions. The stochastic approach and the physical insight developed from its use are illustrated. Flow results from field tests and numerical simulations are presented. Concentration variances are seen to be large near sources of contamination. 891101 Overview of the stochastic modelling of dispersion in fractured media Schwartz, F W; Smith, L In: Advances in Transport Phenomena in Porous Media, edited by J Bear and M Y Corapcioglu P727-750. Publ Dordrecht: Martinus NQhoff. 1987
The development and application of stochastic modelling techniques to study mass transport in fractured media are reviewed. Fracture network classification is first examined, followed by methods for modelling flow, transportation and dispersion in 2- and 3-dimensional discrete networks. A new
891103 Numerical modeling of multiphase flow in porous media Allen, M B In: Advances in TransportPhenomena in Porous Media, editedby J Bear and M Y Corapcioglu P849-920. Publ Dordrecht: Martinus Nijhoff, 1987
Multiphase flow (fluid-air, water-pollutant, oil-water) in porous media is important in groundwater and petroleum engineering. Equations governing flow are nonlinear, and medium geometry is often irregular. Numerical simulation is the only mathematical modelling technique suitable in this field. A review of models for multiphase flow is presented, and recently developed numerical techniques are highlighted. Chemical transport and interphase transfer are included in the analysis. 165 refs. 891104 Moving point techniques Farmer, C L In: Advances in TransportPhenomena in Porous Media, editedby J Bear and M Y Corapcioglu P953-1004. Publ Dordrecht: Martinus Nijhoff, 1987
Transport of miscible contaminants in aquifers or miscible displacement of oil in reservoirs can be described using miscible displacement equations. Moving point techniques may be used to solve these equations. Three classes of moving point technique are described: the modified method of characteristics (MMOC); the pure moving point method (MPM); and the hybrid moving point method (HMPM). Numerical results are used to illustrate areas for which each method is most suitable. The moving point method is shown to track fronts accurately, even in time dependent fingering problems. 891105 Longterm permeability to water of bentonite~eementdiaphragm walls (In German) Schweitzer, F Geoteclmik VII, N3, 1988, P153-157
Change in permeability of a bentonite cement diaphragm wall over a 2.5 year period was monitored in situ and tested in the laboratory. Both methods gave the same results, showing a decreasing coefficient of water permeability during the period. Permeability coefficient plotted against time gave a straight line in a log-log graph. The plot is proposed as a predictive tool for Iongterm impermeability of bentonite cement mixtures based on initial test results.
© 1989 Pergamon Press plc. Reproduction not permitted
An attempt is made to investigate the relation between SPT N count and true resistivity, to examine the possibility of predicting mechanical properties of subsurface strata from resistivity soundings. The limitations of available interpretative techniques are illustrated and the need to verify their deviations from true values is pointed out. A comparative study of results interpreted by different methods is presented.
Permeability and capillarity
continuum approach is proposed for modelling for field problems. Preliminary testing suggests it is a promising tool for dealing with large scale networks of fractures. 891102 Mathematical modelling of the behavior of hydrocarbon reservoirs - the present and the future Odeh, A S In: Advances in TransportPhenomena in Porous Media, edited by J Bear and M Y Corapciog& P821-848. Publ Dordrecht: Martinus Nijhoff, 1987
The reservoir, its fluids, and its properties are introduced. The components of a reservoir simulator are described, and classes of simulators examined. Reservoir flow equations for a black oil system, and the development of a black oil reservoir simulator are studied. More complicated simulators are described, and physical and mathematical modelling compared. Future developments are discussed.
See also: 891020, 891022 891099 Multiphase flow in fractured reservoirs Torsaeter, O; Kleppe, J; van Goif-Racht, T In: Advances in Transport Phenomena in Porous Media, edited by J Bear and M Y Corapcioglu P553-629. Publ Dordrecht: Martinus Nijhoff, 1987
A review of the current knowledge of multiphase flow in fractured reservoirs is presented. Physical properties of fractured rocks are first discussed, followed by field and laboratory tests and mathematical simulations of the imbibition process. The state of the art in modelling of multiphase flow in naturally fractured reservoirs, considering flow equations and matrix/fluid exchange, is then examined. An improved dual porosity model for simulation of multiphase flow in fractured reservoirs is discussed. 891 I00 Stochastic analysis of solute transport in saturated and unsaturated media Gelhar, L W In: Advances in Transport Phenomena in Porous Media, edited by J Bear and M Y Corapcioglu P659-700. Publ Dordrecht: Martinus Nijhoff, 1987
Many practical problems of subsurface flow require predictions for large time and space scales in earth materials which are naturally inhomogeneous. One approach is to treat this inhomogeneity in a stochastic sense. Flow or hansport problems can be expressed in terms of probability distributions. The stochastic approach and the physical insight developed from its use are illustrated. Flow results from field tests and numerical simulations are presented. Concentration variances are seen to be large near sources of contamination. 891101 Overview of the stochastic modelling of dispersion in fractured media Schwartz, F W; Smith, L In: Advances in Transport Phenomena in Porous Media, edited by J Bear and M Y Corapcioglu P727-750. Publ Dordrecht: Martinus NQhoff. 1987
The development and application of stochastic modelling techniques to study mass transport in fractured media are reviewed. Fracture network classification is first examined, followed by methods for modelling flow, transportation and dispersion in 2- and 3-dimensional discrete networks. A new
891103 Numerical modeling of multiphase flow in porous media Allen, M B In: Advances in TransportPhenomena in Porous Media, editedby J Bear and M Y Corapcioglu P849-920. Publ Dordrecht: Martinus Nijhoff, 1987
Multiphase flow (fluid-air, water-pollutant, oil-water) in porous media is important in groundwater and petroleum engineering. Equations governing flow are nonlinear, and medium geometry is often irregular. Numerical simulation is the only mathematical modelling technique suitable in this field. A review of models for multiphase flow is presented, and recently developed numerical techniques are highlighted. Chemical transport and interphase transfer are included in the analysis. 165 refs. 891104 Moving point techniques Farmer, C L In: Advances in TransportPhenomena in Porous Media, editedby J Bear and M Y Corapcioglu P953-1004. Publ Dordrecht: Martinus Nijhoff, 1987
Transport of miscible contaminants in aquifers or miscible displacement of oil in reservoirs can be described using miscible displacement equations. Moving point techniques may be used to solve these equations. Three classes of moving point technique are described: the modified method of characteristics (MMOC); the pure moving point method (MPM); and the hybrid moving point method (HMPM). Numerical results are used to illustrate areas for which each method is most suitable. The moving point method is shown to track fronts accurately, even in time dependent fingering problems. 891105 Longterm permeability to water of bentonite~eementdiaphragm walls (In German) Schweitzer, F Geoteclmik VII, N3, 1988, P153-157
Change in permeability of a bentonite cement diaphragm wall over a 2.5 year period was monitored in situ and tested in the laboratory. Both methods gave the same results, showing a decreasing coefficient of water permeability during the period. Permeability coefficient plotted against time gave a straight line in a log-log graph. The plot is proposed as a predictive tool for Iongterm impermeability of bentonite cement mixtures based on initial test results.
© 1989 Pergamon Press plc. Reproduction not permitted