TY  - EJOU
AU  - Jian-wei, Gu 
AU  - Yang, Liu 
AU  - Qing-dong, Zeng 

TI  - Solution of Nonlinear Seepage Model for Well Group in Fractured Low-permeability Reservoirs
T2  - Structural Longevity

PY  - 2013
VL  - 9
IS  - 3
SN  - 1944-6128

AB  - On the basis of describing the nonlinear seepage characteristics in lowpermeability reservoirs and the conductivity varying law of hydraulic fracture, a
nonlinear mathematics model which couples low-permeability reservoirs and hydraulic fracture is established. The model takes nonlinear and quasi-linear flow
stages in the reservoirs system, and emerging Darcy and non-Darcy flow in the
fracture system into account. Finite difference equation set is derived with Taylor expansion method, and stability condition of the scheme is presented; On that
basis the computer model is formed. The impact of starting pressure gradient,
varying conductivity of the hydraulic fracture on the injection and production well
group production performance is analyzed with the computer model. Result shows
that adopting the nonlinear model could compute the distribution characteristics of
pressure and saturation in the formation more precisely, and describe the production dynamic change law of injection and production well group precisely. The
model could be used as a computing tool for injection and production well group
hydraulic fracturing optimal design in the low-permeability reservoirs.
KW  - low-permeability reservoirs
KW  -  nonlinear seepage
KW  -  starting pressure gradient
KW  -  varying conductivity
KW  -  numerical simulation

DO  - 10.3970/sl.2013.009.181