射孔井水力压裂模拟实验相似准则推导  

Deduction of similarity laws of hydraulic fracturing simulation experiments for perforated wells

作　　者：郭天魁[1] 刘晓强[1] 顾启林[2] 

机构地区：[1]中国石油大学(华东),山东青岛266580 [2]中海油田服务股份有限公司,天津300450

出　　处：《中国海上油气》2015年第3期108-112,共5页China Offshore Oil and Gas

基　　金："十二五"国家科技重大专项"3000型成套压裂装备及应用示范工程(编号:2011ZX05048-10HZ)";国家自然科学基金青年基金项目(编号:51404288);中央高效基本科研业务费专项资金资助项目(编号:15CX02012A);中国石油大学(华东)科研启动基金(编号:Y1302055)部分研究成果

摘　　要：由于对裂缝扩展机理的理解有限,水力压裂数值模拟与实际情况相比会产生较大误差。室内水力压裂模拟实验成为研究水力压裂理论的重要途径,但也必须考虑现场原型与实验模型之间物理现象的相似性来建立相似准则以提高模拟实验的可信度。基于相似第二定理,利用相似理论中的方程分析法对全三维水力裂缝扩展控制方程和射孔井裂缝起裂压力方程进行了无因次化,推导出了射孔井水力压裂模拟实验的相似准则,得出了各物理量间的相似比例关系。实验验证结果表明,推导的相似准则能够为水力压裂模拟实验参数的设计提供依据,对其他情况下相似准则的推导也具有较好的借鉴意义。Due to the limited understanding of fracture propagation mechanism, hydraulic fracturing numeri- cal model will produce some great error compared to the physical results. Hydraulic fracturing simulation experiments in laboratories have become an important approach to study the mechanism of hydraulic fractu- ring. Similarity laws must be built depending on the similarity of the field scenario and the test mode to improve the reliability of the simulation experiment. Based on the second theory of similarity, the equation analysis in similarity theory is used to transform the full 3D hydraulic fracture propagation control equation and the perforated well fracture initiation equation into dimensionless ones, and the similarity laws and scaling factors for different physical parameters are deduced. The experimental results show that the method can provide guidance for the parameter design in hydraulic fracturing simulation tests, which bears great significance in the deduction of similarity laws under other conditions.

关 键 词：水力压裂 模拟实验 相似准则 方程分析法 射孔井 

分 类 号：TE357.11[石油与天然气工程—油气田开发工程]