Advances in Transport Phenomena in Porous Media by Yehuda Bachmat, Jacob Bear (auth.), Jacob Bear, M. Yavuz

By Yehuda Bachmat, Jacob Bear (auth.), Jacob Bear, M. Yavuz Corapcioglu (eds.)

This quantity comprises the lectures offered on the NATO complex examine INSTITUTE that came about at Newark, Delaware, U. S. A. , July 14-23, 1985. the target of this assembly was once to give and talk about chosen themes linked to shipping phenomena in porous media. via their very nature, porous media and phenomena of delivery of in depth amounts that happen in them, are very advanced. the forged matrix should be inflexible, or deformable (elastically, or following another constitutive relation), the void house can be occupied via a number of fluid stages. each one fluid part will be composed of a couple of part, with a number of the parts able to interacting between themselves and/or with the cast matrix. The delivery method should be isothermal or non-isothermal, without or with section alterations. Porous medium domain names during which wide amounts, corresponding to mass of a fluid section, section of a fluid section, or warmth of the porous medium as an entire, are being transported ensue within the perform in various disciplines.

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Qualitative Studies Our initial objectives were to understand the microscopic mechanics of miscible displacements, then the immiscible displacement of water flooding, the usual method of secondary oil recovery. Following then to study the unproven but promising techniques of enhanced oil recovery, particularly those utilising low interfacial tension and miscible processes (23). Recently discovered surfactant mixtures can lower the oil/water interfacial tension some four orders of magnitude to values below 10- 3 mNm- 1 .

MICROSCOPIC BEHAVIOR The pore structure, when examined under the Scanning Electron Microscope, is seen to be extremely complicated (31) as can be seen in Figure 1. The pores are microscopic and are considered to be on average no more than a few micrometers in size (perhaps 2-100 ~m). If the reservoir drawdown area has a radius of some 1 km, the fluids from the outer boundaries will have passed through some tens of millions of pores. Since there are some 10 9 pores in a 1 cm 3 sample and within the pore space, oil, water and sometimes gas distribute themselves, it therefore seems pertinent ~o understand fully the behavior of multiphase fluids within the network system.

Mahers, and John K. Williams Mineral Resources Engineering Department Imperial College London SW7 2AZ United Kingdom ABSTRACT The flow of fluids through natural reservoir bodies is complicated, particularly for multiphase processes and especially if there is mass transfer. Physical modeling using visual techniques can give some of the necessary descriptions leading to the proper formulation of mathematical models for predicting reservoir performance. This chapter describes the micromodel techniques developed at Imperial College, highlighting particularly those involving pore scale events which depend on network and pore morphology.

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