岩性油气藏 ›› 2018, Vol. 30 ›› Issue (4): 133–139.doi: 10.12108/yxyqc.20180416

• 石油工程 • 上一篇    下一篇

利用小型压裂短时间压降数据快速获取储层参数的新方法

张健1, 敬季昀2, 王杏尊2   

  1. 1. 中联煤层气有限责任公司 北京 100020;
    2. 中海油田服务股份有限公司油田生产研究院, 天津 300459
  • 收稿日期:2018-04-07 修回日期:2018-05-28 出版日期:2018-07-21 发布日期:2018-07-21
  • 第一作者:张健(1981-),男,博士,工程师,主要从事煤层气及致密气的开发管理与研究工作。地址:(100020)北京市朝阳区酒仙桥路乙21号国宾大厦中联煤层气有限责任公司。Email:zhangjian16@cnooc.com.cn。

New method for obtaining reservoir parameters with a short time of pressure drop after mini-fracturing

ZHANG Jian1, JING Jiyun2, WANG Xingzun2   

  1. 1. China United Coalbed Methane Company Limited, Beijing 100020, China;
    2. Research Institute of Production Optimization, China Oilfield Services Limited, Tianjin 300459, China
  • Received:2018-04-07 Revised:2018-05-28 Online:2018-07-21 Published:2018-07-21

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摘要： 储层原始地层压力和有效渗透率均是对致密储层进行储层评价、压裂设计和压后配产的重要参数。目前可采用传统试井方法和常规的小型压裂压降测试方法（DFIT方法）来求取这2个参数，但这2种方法都要求较为漫长的测试时间而导致其现场应用受到限制。提出了利用小型压裂短时间压降数据快速获取致密储层原始地层压力和有效渗透率的新方法：通过准确识别小型压裂裂缝闭合后的拟线性流以快速获取储层原始地层压力；在分析液体滤失的基础上，通过模拟压裂后压降曲线并将其与实测曲线进行拟合以快速获取储层有效渗透率。实例计算表明，该方法相较常规方法可大幅缩短测试时间并准确获得储层物性参数，具有较高的现场适用性与可靠性。

Abstract: Initial reservoir pressure and effective permeability are important parameters for reservoir evaluation, fracturing design and well proration of tight reservoirs. Traditional well testing methods and DFIT method are not applicable for tight reservoirs because of the long test time. So a new method for obtaining reservoir parameters quickly with a short time of pressure drop after mini-fracturing was prospered:calculating initial reservoir pressure by identifying pseudo-linear flow regime after fracture closure accurately,and achieving the effective reservoir permeability by simulating and fitting post-fracturing pressure drop curve on the foundation of filtration analysis. At last,the calculation result indicates that this method can be used to obtain the reservoir parameters accurately and shorten the test time greatly.

中图分类号: 

  • TE355
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