水力裂缝表皮因子计算方法讨论和完善  

Discussion and Improvement on Calculation of Skin Factor of Hydraulic Fracture

作　　者：詹悦 Zhan Yue(China Petroleum Engineering&Construction Corp.Southwest Company,Chengdu,Sichuan,610041,China)

机构地区：[1]中国石油工程建设有限公司西南分公司,四川成都610041

出　　处：《天然气与石油》2020年第3期68-71,共4页Natural Gas and Oil

基　　金：东营市科技计划项目“功能化纳米复合减阻新材料合成与应用技术研究”(2017 ZDCX 08)。

摘　　要：水力裂缝表皮因子是影响压裂效果的重要参数,目前常采用Cinco-Ley公式进行分析。为正确认识水力裂缝表皮因子,从表皮因子的推导入手,通过理论分析指出了Cinco-Ley公式的不合理之处,并给出了水力裂缝表皮因子的新公式。新公式与径向流表皮因子公式协调一致,能反映表皮因子的真实物理含义,并指出水力裂缝表皮因子与裂缝长度无关的物理实质。水力压裂应通过减小液体滤失深度或液体残渣物含量来减小水力裂缝表皮因子,而不是通过增大缝长减小表皮因子。该研究结果可为水力压裂的设计提供理论依据。The skin factor of hydraulic fracture is an important parameter affecting the productivity of fracturing.This factor is commonly analysed using the formula proposed by Cinco-Ley.To correctly understand the skin factor of hydraulic fractures,starting from the derivation of the skin factor and theoretical analysis,some imperfections of Cinco-Ley formula were identified and a new formula was then developed.The new formula is consistent with radial flow skin factor formula;it is able to represent the actual physical meaning of skin factor,and indicates that the skin factor of hydraulic fracture is independent of the fracture length.To reduce the skin factor,hydraulic fracturing should be done using frack liquid with less contaminant hence reduces damage on formation permeability and reduces filtration depth of fractured surface instead of increasing the fracture length.This research result can provide theoretical basis for the design of hydraulic fracturing.

关 键 词：水力裂缝 表皮因子 Cinco-Ley公式 裂缝长度 渗流距离 

分 类 号：TE357.1[石油与天然气工程—油气田开发工程]