A research on the characteristic parameters of low permeability reservoirs and its application

Through studying the characteristic parameters of low permeability reservoirs, the permeability - a key characteristic parameter of low permeability reservoirs was found and some valuable characteristic parameters, as porosity, displacement pressure, pore throat medium-radius, minimum non-mercury saturation percentage, related to permeability most closely were chosen. The numerical model of permeability corresponding to major characteristic parameters is investigated; by use of grey association analysis method, the associability and associated sequence are calculated through a self-making program; the numerical models of the carbonate reservoir bed of Carboniferous gas reservoir in Wubaiti gas field, the carbonate reservoir bed at the low permeability area of Lei-1' gas reservoir in Moxi gas field, the elastic reservoir bed at the low permeability area of Xu-4 gas reservoir in Bajiaochang gas field and the clastic reservoir bed st the low permeability area of Xu-2 gas reservoir in Pingluoba gas field are set up and a quanlified description and comprehensive evaluation of these reservoir beds are carried out in the paper.