分析近井筒效应的新模型及方法  

Research on the New Model and Method of Analyzing Near-wellbore Effects

作　　者：郭大立[1] 计勇[1] 许江文[2] 祝凯[1] 

机构地区：[1]"油气藏地质及开发工程"国家重点实验室.西南石油大学,四川成都610500 [2]中国石油新疆油田分公司勘探公司,新疆克拉玛依834000

出　　处：《西南石油大学学报（自然科学版）》2012年第5期177-182,共6页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家科技重大专项重点项目示范工程19(2011ZX05062)

摘　　要：近井筒效应是影响油气层压裂措施成败的重要因素之一,而现有的近井筒效应分析技术的模型一定程度上存在计算复杂和适应性局限等问题。从近井筒效应的机理分析出发,研究了分析近井筒效应的新模型,结合最优化技术,提出了新的数学拟合方法,使模型计算更为简便和准确。通过大量现场实例应用,说明了该技术不仅适用于排量稳定下降方式的普通测试压裂,也适用于排量任意变化方式的普通压裂,同时,该技术还可替代降排量测试压裂,减少了施工环节和作业费用。Near-wellbore effects is one of the most important factors which affects the success or failure of reservoir fracturing measures.However,the calculation of the current near-wellbore effects analysis model is too complex and its adaptability is limited to some extent.Based on the mechanism of near-wellbore effects,the new computational model of near-wellbore effects,was studied and a new mathematical fitting method associated with optimization techniques is proposed,which makes the calculation of model easier and more accurate.Its application shows that this new technology is suitable not only for the fracturing test of a steady decline mode in displacement but also the normal fracturing of mode of arbitrary variation in displacement.Meanwhile,since it can substitute for the test fracturing of a steady decline mode,it reduces construction links and operating expenses.

关 键 词：水力压裂 近井筒效应 裂缝进入摩阻 摩阻 

分 类 号：TE357[石油与天然气工程—油气田开发工程]