Application of comprehensive characteristic parameters of reservoirs to predict the gas deliverability in the layer p_1x~3 of the Daniudi gas field

The Upper Paleozoic sands gas layers in the Daniudi gas field is characterized by low porosity,low permeability,and low abundance. This paper analyzed the sensitivity to the rocks in p1x3's layer with low porosity,low permeability and gas containing applying comprehensive characteristic parameters of well logging,and then built up a standard of classifying gas reservoirs. Compared with the absolute open flow in gas bearing layer,we built up a standard of classifying the reservoirs into high,middle,and low deliverability,and selected the ratio parameters which had most contribution to deliverability in combination with the measured open flow to construct a fitting predicting formula to calculate the absolute open flow,and finally the formula can be validated by the example. This method is very effective and convenient in identifying the level of deliverability of gas reservoir.