钻采工艺 ›› 2022, Vol. 45 ›› Issue (6): 65-69.

• 开采工艺 • 上一篇    下一篇

井筒听诊器技术在川南页岩气田的应用研究

胡俊杰,周小金,周拿云,王怡亭,黄永智,徐颖洁   

  1. 中国石油西南油气田分公司页岩气研究院
  • 出版日期:2022-11-25 发布日期:2022-11-30
  • 作者简介:胡俊杰(1992-) ,硕士,工程师,2020年毕业于美国南加州大学石油工程专业, 现主要从事非常规油气储层改造研究工作。地址:(610051) 四川省成都市成华区建设北路一段83号西南油气田分公司页岩气研究院,电话:13558867227,E-mail:hujunjie127@ petrochina. com. cn
  • 基金资助:
    中国石油天然气股份有限公司勘探与生产分公司科研项目 “西南页岩气体积改造技术攻关与现场 试 验” (编号:2021 CGCGZ005)。

Application and Research of WellWatcher Technology in Southern Sichuan Shale Gas Field

HU Junjie, ZHOU Xiaojin, ZHOU Nayun, WANG Yiting, HUANG Yongzhi, XU Yingjie   

  1. Shale Gas Research Institute, PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan 610051, China
  • Online:2022-11-25 Published:2022-11-30

摘要: 为了丰富页岩气压裂的评价手段,为现场提供辅助决策,实现压裂资源的有效配置,井筒听诊器技术应运而生。该技术是一种非干扰的实时监测技术,通过采集压裂施工过程中水击震荡变化而产生的压力波信号,可以在压裂过程中实时定量地诊断压裂改造进液点深度,并对段内单簇是否进液进行有效评价,从而确定射孔簇的改造情况,判断改造井段是否需要进行二次封隔措施或者调整改造规模。采用该技术在川南页岩气田开展了多次现场试验评价,通过在压裂阶段停泵实时监测进液位置,针对常规页岩气水平井和套变页岩气水平井,评价了暂堵转向压裂工艺效果以及机械桥塞封隔的有效性。该技术能有效指导暂堵转向压裂工艺参数优化,进一步实现压裂改造范围的最大化,也为压后效果评估提供技术支持,从而加强各工艺间的交叉验证,助推非常规油气储层增产改造工艺技术进步。

关键词: 页岩气, 井筒听诊器技术, 水力压裂, 天然裂缝, 暂堵转向, 套管变形, 压后效果评估

Abstract: In order to enrich the evaluation methods of shale gas fracturing, providing auxiliary decision0making for the site and making an effective allocation of resources, WellWatcher technology came into being. This technology, which is a non-interference real-time monitoring technology,by collecting the pressure wave signal generated by the change of water hammer vibration during fracturing, can diagnose quantitatively the depth of the liquid inlet point in real time during the fracturing process,and effectively evaluate whether the liquid has entered a single cluster in the section,so as to determine the fracturing of the perforated cluster,and judge whether the secondary sealing measures or adjustment of the fracturing scale are required for the fractured well section. Many field tests and evaluations have been carried out in southern Sichuan shale gas field with this technology. For conventional shale gas horizontal wells and shale gas horizontal wells under casing deformation, by stopping the pump in the fracturing stage and monitoring the liquid inlet position in real time, the effect of temporary blocking steering fracturing process and the effectiveness of mechanical bridge plug sealing are evaluated. This technology can effectively guide the parameters optimization for temporary plugging and fracturing process, further maximize the scope of fracturing, and provide technical support for post-fracturing effect evaluation, so as to strengthen the cross validation among various processes and promote the technological progress of unconventional oil and gas reservoir stimulation and transformation.

Key words: shale gas, WellWatcher technology, hydraulic fracturing, natural fracture, temporary blocking steering;casing deformation, post-fracturing evaluation