| 水合物开采过程中影响套管式加热器对井周地层加热效果的数值模拟 |
| 投稿时间：2018-11-06 修订日期：2019-04-12 点此下载全文 |
| 引用本文：康家浩,郭威,陆程,等.水合物开采过程中影响套管式加热器对井周地层加热效果的数值模拟[J].钻探工程,2019,46(6):1-7.KANG Jiahao,GUO Wei,LU Cheng,et al. Numerical simulation of heating process of casing heater in natural gas hydrate production wells[J]. Drilling Engineering, 2019,46(6):1-7. |
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| 基金项目:中国地质调查局项目（编号：DD20190232） |
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| 中文摘要:套管式加热器在维持孔壁稳定的同时还可实现对井周地层加热，以防止水合物开采过程中井周形成二次水合物。为分析水合物开采过程中日产水量、气水比和加热功率对井周地层温度分布的影响，采用COMSOL Multiphysics对加热过程进行模拟。模拟结果表明，日产水量对加热效果的影响明显大于加热功率，加热功率主要影响近井段的地层温度，气水比主要影响加热半径。通过数值模拟对套管加热器的加热效果进行了分析和评价，对天然气水合物的经济高效开采具有指导意义。 |
| 中文关键词:套管式加热器 加热功率 二次水合物 日产水量 气水比 数值模拟 |
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| Numerical simulation of heating process of casing heater in natural gas hydrate production wells |
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| Abstract:The casing heater can also maintain the wellbore formation while maintaining the stability of the pore wall to prevent the formation of secondary hydrates in the well during the hydrate production process. In order to analyze the influence of daily water production, gas-water ratio and heating power on the temperature distribution in the well formation during the hydrate production process, the heating process was simulated by COMSOL Multiphysics. The simulation results show that the effect of water production rate on the heating effect is obviously greater than the heating power. The heating power mainly affects the formation temperature of the near-well section, and the gas-water ratio mainly affects the heating radius. The numerical simulation is used to analyze and evaluate the heating effect of casing heater, which is of guiding significance for the economical and efficient mining of natural gas hydrate. |
| keywords:casing heater heating power secondary hydrate daily water production numerical simulation |
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