Six calculation models considering pressure sensitive are
provided: Palmer-Mansoori pressure sensitive model, Seldle-Suitt pressure sensitive model,
exponential model, logarithmic model, modified Palmer-Mansoori pressure sensitive model and
direct experimental data.
Langmuir hypothesis was used to consider adsorption and
Fick diffusion equation is used for formation gas diffusion.
For the high speed seepage of gas, the Darcy law is modified by
The state equation of real gas is used to analyze coalbed gas
Software provides a joint analysis method for DST well testing to
Software provides well testing analysis of injection pressure
drop, such as broken coalbed formation provides G function and other analysis methods to
For shale gas, in addition to considering pressure sensitivity,
adsorption, diffusion and high speed non-Darcy seepage (the same as coalbed gas), the
following models are provided:
Three kinds of horizontal well
multi-fracturing models with uniform flow rate, infinite conduction and finite conduction
Providing multi-stage fracturing model
of horizontal well with unequal length and equal distance.
To provide multiple fracture models
for fracturing along horizontal wells.