ABSTRACT
Energy transfer is a common phenomenon in nature,
more common in various engineering fields. It can
be reckoned that in the industries related to energy
consumption, especially those high energy consump-
tion ones, such as power, petrochemicals, construc-
tion materials, oil and so on, all of the various tech-
nology processes and driving process are powerfully
influenced by energy transfer situation of its produc-
tion processes or equipment. Therefore, the energy
transfer study direction must not deviate from the
requirement of engineering applications. At present,
the conducted energy transfer study in engineering is
mostly confined to the energy transfer process
emerged from a single potential field (temperature
field) alone, however, the energy transfer process of
multi-field cooperation occurred widely in nature
and engineering practice, and it should become one
of the main study directions of energy transfer
theory in the near future (Cheng et al. 2003). The
heat and mass transfer in oil reservoir porous media
mainly deals with the coupling of four factors, i.e.,
thermal, hydraulic, mechanics and chemical. Among
these factors, the changes in one process bound to
affect another process changes in different degree. In
fact, the multi-field coupling relation is the mutual
conversion of different energy forms, because any
form energy change will affect the distribution of the
other forms of energy. In addition to comply with
the general mass, momentum, and energy conserva-
tion law, the field quantity also must be enslaved to
Darcy Law, Newton Law of Viscosity, Fourier Law,
Fick Law of Diffusion and the other irreversible
phenomenological law, the cross-transport between
the irreversible process leads to coupling. The phe-
nomenological law of transmission study, with a
clear mechanism, a simple form and a vast area of
application, is a kind of study method which is suit-
able for engineering application. On the basis of ex-
ploring the relationship between power, resistance
and efficiency in the process of multi-field energy
transfer, the method can evaluate the reasonableness
of the process or distinguish its weak points from the
dynamic perspective and can provide some valuable
information for engineering application.