...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Heat Transfer >Numerical Modeling of Heavy- Oil Recovery Using Electromagnetic Radiation/ Hydraulic Fracturing Considering Thermal Expansion Effect
【24h】

Numerical Modeling of Heavy- Oil Recovery Using Electromagnetic Radiation/ Hydraulic Fracturing Considering Thermal Expansion Effect

机译：考虑热膨胀效应的电磁辐射/水力压裂法开采稠油的数值模拟

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Production of heavy oil from deep/tight formation using traditional technologies (“cold” production, injection of hot steam, etc.) is ineffective or inapplicable. An alternative is electromagnetic (EM) heating after fracturing. This paper presents the results of a numerical study of heavy oil production from a well with hydraulic fracture under radiofrequency (RF) EM radiation. Two parameters ignored in our previous modeling studies, namely adiabatic effect and the thermal expansion of oil, are considered in the new formulation, while high gradients of pressure/temperature and high temperature occur around the well. The mathematical model calculates the distribution of pressure and temperature in the system of “well-fracture-formation.” The distribution of thermal heat source is given by the Abernetty expression. The mathematical model takes into account the adiabatic effect and the thermal expansion of heavy oil. The latter makes a significant contribution to heavy oil production. Multistage heavy production technology with heating is assumed and several stages are recognized: stage 1: “Cold” heavy oil production, stage 2: RF-EM heating, and stage 3: RF is turned off and “hot” oil production continues until the flow rate reaches its initial (before heating) value. These stages are repeated starting from the second stage. Finally, RF-EM heating technology is compared to “cold” production in terms of additional oil production and economics. When producing with RF-EM heating with power 60 kW (50 days in the second stages), the oil rate increased several times. Repeated RF-EM heating (25 days in the fourth stage) doubled the production rate. Near-well region temperature increased by ∼82 °C in the second stage with RF-EM heating. Temperature increased by ∼87 °C in the fourth stage with repeated RF-EM heating and production cycles. Economic analysis and evaluation of energy balance showed that the multistage production technology is more efficient; i.e., the lower the payback period, the greater the energy balance. With the increase in pressure difference, the payback period and energy balance increased linearly.
机译：使用传统技术（“冷”生产，注入热蒸汽等）从深层/致密层中生产重油是无效或不适用的。另一种选择是压裂后的电磁加热。本文介绍了在射频（RF）EM辐射下水力压裂井中稠油产量的数值研究结果。在新的配方中考虑了我们先前建模研究中忽略的两个参数，即绝热效果和油的热膨胀，而井周围出现了高压力/温度和高温梯度。该数学模型计算“井眼裂缝地层”系统中压力和温度的分布。热热源的分布由Abernetty表达式给出。该数学模型考虑了绝热效应和重油的热膨胀。后者为重油生产做出了重大贡献。假设采用加热的多级重油生产技术，并确认了以下几个阶段：第1阶段：“冷”重油生产，第2阶段：RF-EM加热，第3阶段：关闭RF，“热”油生产继续进行，直到流动加热速率达到其初始值（加热前）。从第二阶段开始重复这些阶段。最后，在额外的石油生产和经济方面，将RF-EM加热技术与“冷”生产进行了比较。当使用功率为60 kW的RF-EM加热进行生产（第二阶段为50天）时，机油率提高了数倍。重复的RF-EM加热（第四阶段为25天）使生产率提高了一倍。在第二阶段，通过RF-EM加热，近井区域温度升高了约82C。在第四阶段，通过反复进行RF-EM加热和生产循环，温度提高了约87°C。能量平衡的经济分析和评估表明，多级生产技术效率更高。即投资回收期越短，能量平衡就越大。随着压差的增加，投资回收期和能量平衡线性增加。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号