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Production Decline Behavior Analysis of a Vertical Well with a Natural Water Influx/Waterflood

机译：用天然水流入/水机会的垂直生产衰退行为分析

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摘要

The production decline type curves are considered as a robust technique to interpret the production data and obtain the flow parameters, the original gas in place, etc. However, most of the previous models have focused on the primary depletion with a closed boundary, rather than on the secondary depletion with a water influx/waterflood. Therefore, in this study, a transient flow model considering the water influx/waterflood is developed. Subsequently, the functions of the production decline type curves for a vertical well with a water influx/waterflood are derived based on the material balance equation. In other words, the theory of Blasingame production decline analysis is extended to the water influx/waterflood reservoir. Further advanced Blasingame production decline type curves for a vertical well in water influx/waterflood reservoirs are generated. Compared with Blasingame type curves without a water influx/waterflood, the behavior of the ones presented in this study is quite different at the boundary. Thereafter, the effects of the relevant parameters, including the dimensionless maximum water influx, the dimensionless beginning time of the water influx, and the dimensionless external boundary radius, are studied on type curves. Finally, Blasingame type curves for a vertical well in water influx/waterflood reservoirs are verified through a field case study. This work provides very meaningful references for reservoir engineers working on the evaluation of the water influx and the estimation of the beginning time of the water influx by matching the developed type curves with the actual field data.
机译：生产下降类型曲线被认为是一种稳健的技术来解释生产数据并获得流量参数，原始气体到位等，但是，之前的大多数模型都集中在封闭边界的主要耗尽上，而不是关于水流量/水翅片的二次消耗。因此，在本研究中，考虑到水流量/水灌木的瞬态流量模型是开发的。随后，基于材料平衡方程，推导出垂直井的生产下降型曲线的功能。换句话说，Blasingame生产衰退分析理论延伸到水中/水泡水库。生成了进一步的高级润滑味制作下降型型垂直井/水翅片储层的垂直曲线。与没有水流入/水机的污染物型曲线相比，本研究中呈现的行为在边界中完全不同。此后，在型曲线上研究了相关参数，包括无量纲最大水分流量，包括无量度的最大水分流量，水流入的无量纲的外界边界半径。最后，通过现场案例研究验证了水流入/水翅片储层中垂直井的Blasingame型曲线。这项工作为研究水流量评估的储层工程师提供了非常有意义的参考资料，并通过将开发的类型曲线与实际现场数据匹配来估计水流入的开始时间。

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  • 来源
    《Mathematical Problems in Engineering》 |2019年第19期|1683989.1-1683989.9|共9页
  • 作者

    Wei Mingqiang; Ren Keyi; Duan Yonggang; Chen Qingxuan; Dejam Morteza;

  • 作者单位

    Southwest Petr Univ State Key Lab Oil & Gas Reservoir Geol & Exploita Chengdu 610500 Sichuan Peoples R China;

    Southwest Petr Univ State Key Lab Oil & Gas Reservoir Geol & Exploita Chengdu 610500 Sichuan Peoples R China;

    Southwest Petr Univ State Key Lab Oil & Gas Reservoir Geol & Exploita Chengdu 610500 Sichuan Peoples R China;

    PetroChina Changqing Oil Field Branch Gas Prod Plant 3 Uxin Banner 017300 Inner Mongolia Peoples R China;

    Univ Wyoming Coll Engn & Appl Sci Dept Petr Engn 1000 East Univ Ave Laramie WY 82071 USA;

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