According to the theory of unstable well testing and the analysis of a large quantity of data obtained in field, the authors hold that in well testing, the gas production of a low permeability gas well should match with the gas supplying capacity of the gas reservoir; otherwise, it is impossible to obtain the correct and reliable result of well testing interpretation.

Selection of reasonable drawdown pressure with consideration of deformation effect for low permeability gas reservoir;

A study on numerical simulation of deformable low permeability gas reservoir;

Productivity analysis of fractured well in low permeability gas reservoir;

Present state of low permeability reservoir percolation study;

Study on water lock effect in low permeability reservoir;

Influence of start-up pressure gradient and stress sensitivity on productivity of low-permeability gas reservoirs;

An unsteady seepage flow model considering kickoff pressure gradient for low-permeability gas reservoirs;

Productivity analysis for fractured well in low-permeability gas reservoirs considering slippage effect

In this paper, a zero-filtration hole stabilizing agent and composition of ultra-low permeability drilling fluid are presented.

Ultra-low filter loss drilling fluids have gained wide use in recent years because of its performance in bore hole stabilization,reservoir protection and mud loss control.