基于数字滤波的压裂停泵数据反演方法

doi:10.3969/j.issn.0253-2778.2018.05.008

中国科学技术大学学报 ›› 2018, Vol. 48 ›› Issue (5): 392-399.DOI: 10.3969/j.issn.0253-2778.2018.05.008

基于数字滤波的压裂停泵数据反演方法

温杰雄，田伟，毕全福，李雪彬，卢德唐

1.中国科学技术大学近代力学系，安徽合肥 230027；2.中国石油集团西部钻探工程有限公司试油公司，新疆克拉玛依 834027

收稿日期:2016-05-25 修回日期:2017-02-16 接受日期:2017-02-16 出版日期:2018-05-31 发布日期:2017-02-16
通讯作者: 卢德唐
作者简介:温杰雄，男，1990年生，硕士.研究方向：流体动力学.E-mail: wjx2009@mail.ustc.edu.cn
基金资助:
中国科学院战略先导科技专项（XDB10030402）和中国科学院-中石油重大战略合作项目（2015A-4812）资助.

A new data inversion analysis method based on digital filtered pump-stop data of hydraulic fracturing

WEN Jiexiong, TIAN Wei, BI Quanfu, LI Xuebin, LU Detang

1. Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, China； 2. CNPC Xibu Drilling Engineering Company Limited, Karamay 834027, China

Received:2016-05-25 Revised:2017-02-16 Accepted:2017-02-16 Online:2018-05-31 Published:2017-02-16

摘要/Abstract

摘要： 水力压裂是目前开采致密油气的主要方式，压裂施工期间测量的地面压力及流量数据包含地层压力、渗透率和裂缝半长等重要信息，这些参数是判断压裂施工成功率及压后开采制度制定的重要依据.提出了基于数字滤波压裂停泵数据反演方法，首先采用井筒垂直管流方程将变密度和流量的地面压力折算到井底压力，其次采用FIR滤波处理停泵后压降数据，消除停泵水锤等噪声干扰，获得反映地层渗流的压降数据，最后采用垂直裂缝井试井分析方法解释滤波后的压降数据，获得地层渗透率、原始地层压力及裂缝半长等重要参数，实现了对裂缝及地层参数的实时分析及评价.通过与关井压力恢复分析结果比较，证明了所提方法的可靠性.

关键词: 数字滤波, 水力压裂, 试井分析, 压裂评价

Abstract: Hydraulic fracturing is currently the main method of exploiting tight gas and oil. The pump-stop pressure and flow-rate data measured during hydraulic fracturing process contains a great deal of important information, such as the formation pressure, permeability and fracture half-length. These parameters are significant judgment to decide post-fracturing mining system. A new method of pump-stop data-inversion analysis method based on digital filtered pump-stop flow-rate and density-changing pressure data of hydraulic fracturing was presented. Firstly, the ground pressure was converted to the well bottom pressure according to the vertical pipe flow theory. The obtained bottom pressure data, also known as pump-stop pressure data, was processed through the FIR filter to eliminate the interference of water hammer and other noise signals. Finally, the filtered data, which contains the information of formation permeability and initial pressure, was processed according to vertical fracture well test analysis. This new method has been proved reliable by comparing it with pressure build-up, making real-time evaluation of fracture and formation information possible.

Key words: digital filtering, hydraulic fracturing, well test analysis, fracturing evaluation

中图分类号:

TE357.1+4

温杰雄，田伟，毕全福，李雪彬，卢德唐. 基于数字滤波的压裂停泵数据反演方法[J]. 中国科学技术大学学报, 2018, 48(5): 392-399.

WEN Jiexiong, TIAN Wei, BI Quanfu, LI Xuebin, LU Detang. A new data inversion analysis method based on digital filtered pump-stop data of hydraulic fracturing[J]. Journal of University of Science and Technology of China, 2018, 48(5): 392-399.

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基于数字滤波的压裂停泵数据反演方法

A new data inversion analysis method based on digital filtered pump-stop data of hydraulic fracturing

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