Through example calculation,the preferred flowing path developed in positive rhythm thick oil reservoir is not in line with Darcy linear flow but is consistent with non-Darcy flow with high velocity.

3D gas, water two-phase flow, as well as gas diffusion in the fracture system of China’s low-voltage, low-permeability geological conditions were took into account in the model, that is, in addition to considering Darcy flow existed in fracture system, there exists gas dispersion.

Mechanism of gas non-darcy flow in low permeability reservoirs;

Fully implicit simulation model for low-velocity non-Darcy flow;

Several Propositions about Theory Solution of Moving Boundary Model Non-darcy Flow through Low Permeability Reservoir;

Laboratorial study on non-Darcy seepage in Xiaoshan clay;

Nonlinear dynamic analysis on non-Darcy seepage in over-broken rock mass;

Low-permeability formations will be encountered during gas drilling,the formation liquid will flow into the well as low-speed non-Darcy seepage.

Numerical model of low velocity non Darcy percolation for fractal reservoir has been set up according to fractal geometry and non Darcy percolation mechanics.