Application of skin factor in the deliverability testing of horizontal wells in gas reservoir

Thanks to a number of factors, the modified isochronal testing curve will be abnormal (binomial deliverability testing's slope is negative) processed by conventional methods in the low permeability and dense gas reservoir horizontal wells, so that the deliverability can not be analysed and evaluated. Because the pressure drop caused by skin factor and we analyse this abnormal phenomenon in order to remedy errors caused by conventional methods.