裂缝强制闭合时间预测新模型  

New Model of Forced Closure Time Forecast

作　　者：李勇明[1] 郭建春[1] 胡景宏[1,2] 赵金洲[1] 牟凯[1] 岳迎春[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]中国石油大学(北京),北京102249

出　　处：《油气井测试》2011年第3期1-3,75,共3页Well Testing

基　　金：四川省应用基础研究项目(2007JY042);国家自然科学基金项目(50774064)资助

摘　　要：压裂液强制返排时,需获得裂缝强制闭合时间来确定转换油嘴的时机,一般该时间是通过压降分析模型求解得到的。在考虑压裂液二维滤失及压裂液压缩性的基础上,结合物质平衡原理、岩石力学和流体力学的相关理论,建立了裂缝强制闭合时间预测新模型。与压降分析模型相比,该模型不需要冗长的压降数据,且由于考虑因素较为全面,使计算结果更加准确可靠。模型也适用于裂缝自然闭合的情况。根据建立的模型,编制相应软件,进行了实例计算。当没有现场压降数据时,该模型的建立为裂缝强制闭合时间的预测提供了一种新方法。The chance of shifting choke determined by forced closure time during forced unflowing procedure is always obtained by pressure drop analysis model.Considered two-dimensional leadoff and compression for fracturing fluid,combined with material balance theory,rock mechanics and fluid mechanics,a new mathematical model is developed.Compared with drawdown analysis model,this new model not only need no the long descending data,but also the calculated result is more reliable for full considerate factors,and the model is also suit to natural fracture closure.Based on the set model,corresponding worked out software,the calculation of an example is given.The model gives a new way to calculate forced closure time without field pressure drawdown data.

关 键 词：水力压裂 裂缝 放喷 强制闭合 数学模型 

分 类 号：TE32[石油与天然气工程—油气田开发工程]