Advanced water injection in low permeability reservoir of The wuqi oilfield;

Oil and water distribution during advanced water injection process in low permeability reservoir

And put forward a way to calculate the optimum occasion of advanced water injection.

In consideration of the problems of starting pressure,effective driving pressure difference being hard to be established between oil and water wells in low permeability oilfields,it was proposed that advance water injection was used.

Study on the best fracturing opportunity of the oil wells in the advanced water flooding zone of super-low permeability reservoirs;

Study on the stimulation mechanism of the advanced water flooding in low-permeability oilfield;

Construction technology of the pre-grouting small pipe in Dawoshan tunnel;

Three-dimensional FEM is used to calculate the deformation and stability of tunnel under tunnel boring machine (TBM) excavation in big fault zone after pre-grouting.

Room mining technology can be used to recover the residual ore distributing in backfill,and that pre-grouting is necessary for good working conditions.