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A study of the mechanism of nonuniform production rate in shale gas based on nonradioactive gas tracer technology
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2020-05-01 , DOI: 10.1002/ese3.691 Shan Huang 1 , Wuguang Li 1 , Jianfa Wu 1 , Haijie Zhang 2 , Yuanping Luo 2
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2020-05-01 , DOI: 10.1002/ese3.691 Shan Huang 1 , Wuguang Li 1 , Jianfa Wu 1 , Haijie Zhang 2 , Yuanping Luo 2
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The performance of horizontal wells in shale gas is controlled by multiple factors, and there is a difference in gas production rate between different fracturing stages. However, the mechanism of the nonuniform gas production rate is still not clear. In this paper, a typical shale gas well in the Longmaxi formation was selected to conduct the performance evaluation based on the nonradioactive gas tracer technology. The gas production profile was obtained, and the production feature of each stage was analyzed. On this basis, the production differences between fracturing stages were compared in four aspects: reservoir physical properties, distribution of natural fracture, parameters of fracturing operation, and technology of temporary plugging re‐orientation. The effect of various factors on the contribution of each stage was analyzed. And then, the mechanism of the nonuniform gas production rate was clarified. Finally, relevance analysis was performed to determine the main controlling factors, and a mathematical model for characterizing the nonuniform gas production rate feature was established by adopting the nonlinear regression method. This study provides a reliable basis for optimal fracturing designing and reasonable production planning.
中文翻译：
基于非放射性气体示踪技术的页岩气生产率不均匀机理研究
页岩气水平井的性能受多种因素控制，不同压裂阶段之间产气速率存在差异。但是，气体不均匀率的机理尚不清楚。本文基于非放射性气体示踪技术，选择了龙马溪组典型的页岩气井进行性能评价。获得了产气曲线，并分析了每个阶段的生产特征。在此基础上，从四个方面对压裂阶段之间的产量差异进行了比较：储层物性，天然裂缝分布，压裂操作参数和临时堵漏重新定位技术。分析了各个因素对每个阶段贡献的影响。然后，阐明了气体不均匀率的机理。最后，进行了相关分析以确定主要控制因素，并采用非线性回归方法建立了表征不均匀产气率特征的数学模型。该研究为最佳压裂设计和合理的生产计划提供了可靠的基础。
更新日期：2020-05-01
中文翻译：
基于非放射性气体示踪技术的页岩气生产率不均匀机理研究
页岩气水平井的性能受多种因素控制，不同压裂阶段之间产气速率存在差异。但是，气体不均匀率的机理尚不清楚。本文基于非放射性气体示踪技术，选择了龙马溪组典型的页岩气井进行性能评价。获得了产气曲线，并分析了每个阶段的生产特征。在此基础上，从四个方面对压裂阶段之间的产量差异进行了比较：储层物性，天然裂缝分布，压裂操作参数和临时堵漏重新定位技术。分析了各个因素对每个阶段贡献的影响。然后，阐明了气体不均匀率的机理。最后，进行了相关分析以确定主要控制因素，并采用非线性回归方法建立了表征不均匀产气率特征的数学模型。该研究为最佳压裂设计和合理的生产计划提供了可靠的基础。
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