气藏水平井产能试井中表皮系数的应用

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

何同均 冯仁鹏 王柳

He Tongjun Feng Renpeng Wang Liu

西南石油大学研究生院, 四川成都 610500; 中国石油西南油气田分公司蜀南气矿工艺研究所, 四川泸州 646001

Graduate School of Southwest Petroleum University, Chengdu 610500; Shunan Gas Technology Institute of PetroChina Southwest Oil and Gas Company, Luzhou 646001

在低渗透致密气藏水平井中, 由于诸多因素的影响, 修正等时试井曲线按常规方法处理出现异常(二项式产能试井分析曲线斜率为负), 致使无法进行产能解释和分析评价。针对这种现象, 从表皮系数引起表皮压力降的角度加以理论分析, 解决气藏水平井修正等时试井曲线按常规的方法处理出现的异常情况。

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.