南川页岩气井无限级滑套开启异常分析与处理实践  

Analysis and measures of abnormal opening of unlimited-stage sliding sleeve in Nanchuan shale gas wells

作　　者：周博成 ZHOU Bocheng(Petroleum Engineering Technology Research Institute,East China Oil&Gas Company,SINOPEC,Nanjing 210019,Jiangsu,China)

机构地区：[1]中国石化华东油气分公司石油工程技术研究院,江苏南京210019

出　　处：《石油地质与工程》2024年第5期94-99,共6页Petroleum Geology and Engineering

基　　金：中国石化科技部项目“常压页岩气钻完井及配套工艺技术研究”(P21087-5)。

摘　　要：页岩气压裂过程中无限级滑套分段工具经常出现打开故障,在阐述无限级滑套工作原理的基础上,通过分析现场压裂施工数据,开展了无限级滑套开启异常分析,并划分了无限级滑套在压裂施工中的开启异常类型。结果表明,无限级滑套开启异常共存在夹筒遇阻、滑套未立即打开、滑套打开不完全、打开其他压裂段滑套与夹筒通过对应滑套五种类型;并结合泵送夹筒压力曲线分析了每一种异常类型的压力曲线特征,提出了相应的改进措施和压裂施工处理措施,可为今后无限级滑套在页岩气井的水力压裂施工提供技术借鉴。During the process of shale gas fracturing,the unlimited-stage sliding sleeve sectioning tool often fails to open.For this reason,abnormal opening conditions were analyzed in this paper.Combined with the working principles of unlimited-stage sliding sleeve and fracturing pressure data,common malfunctions were summarized.There was 5 types in abnormal opening:the dart got stuck,the sliding sleeve not opened immediately,the sliding sleeve not fully opened,the dart opened wrong sliding sleeve and the dart passed through the matching sliding sleeve.The reasons for the opening failure were explained,and the improvement measures and countermeasures were proposed,which provided technical guidance for the hydraulic fracturing practices using unlimited-stage sliding sleeves in shale gas wells in the future.

关 键 词：无限级滑套 开启异常分析 页岩气 水力压裂 改进措施 

分 类 号：TE357[石油与天然气工程—油气田开发工程]