Non-linear filtration models and the effect of nonlinearity parameters on flow rates in low-permeability reservoirs

Abstract

Filtration of oil in low-permeable reservoirs is considered. The experimental data of dependence of filtration velocity on pressure gradient are analysed. It is shown that the filtration law in low-permeability reservoirs differs from the linear Darcy’s law and from the non-linear law with an initial pressure gradient. The power law of filtration in low-permeability reservoirs is experimentally substantiated. Models of nonlinear filtration influence on flow rate are proposed. The analysis of influence of nonlinear filtration parameters on flow rate in technogenically modified near-wellbore zone is carried out.

Keywords

• low-permeability reservoirs
• permeability
• nonlinear filtration law
• near-wellbore zone
• flow rate