Petroleum Science >2012, Issue 4: 498-505 DOI: https://doi.org/10.1007/s12182-012-0234-5
Coupled thermo-hydro analysis of steam flowin a horizontal wellbore in a heavy oil reservoir Open Access
文章信息
作者：Li Mingzhong,Wang Yiping and Wang Weiyang
作者单位：
School of Petroleum Engineering, China University of Petroleum, Qingdao, Shandong 266580, China;School of Petroleum Engineering, China University of Petroleum, Qingdao, Shandong 266580, China;School of Petroleum Engineering, China University of Petroleum, Qingdao, Shandong 266580, China
投稿时间：2011-12-02
引用方式：Li, M., Wang, Y. & Wang, W. Pet. Sci. (2012) 9: 498. https://doi.org/10.1007/s12182-012-0234-5
文章摘要
A novel model for dynamic temperature distribution in heavy oil reservoirs is derived from
the principle of energy conservation. A difference equation of the model is firstly separated into radial
and axial difference equations and then integrated. Taking into account the coupling of temperature and
pressure in the reservoir and wellbore, models for calculating distributions of the reservoir temperature,
reservoir pressure, and water saturation are also developed. The steam injected into the wellbore has a
more significant effect on reservoir pressure than on reservoir temperature. Calculation results indicate
that the reservoir temperature and pressure decrease exponentially with increasing distance from the
horizontal wellbore. The radial variation range of the pressure field induced by steam is twice as wide
as that of the temperature field, and both variation ranges decrease from the wellbore heel to the toe.
Variation of water saturation induced by steam is similar to the temperature and pressure fields. The radial
variation ranges of the reservoir temperature and pressure increase with steam injection time, but rate of
increase diminishes gradually.
the principle of energy conservation. A difference equation of the model is firstly separated into radial
and axial difference equations and then integrated. Taking into account the coupling of temperature and
pressure in the reservoir and wellbore, models for calculating distributions of the reservoir temperature,
reservoir pressure, and water saturation are also developed. The steam injected into the wellbore has a
more significant effect on reservoir pressure than on reservoir temperature. Calculation results indicate
that the reservoir temperature and pressure decrease exponentially with increasing distance from the
horizontal wellbore. The radial variation range of the pressure field induced by steam is twice as wide
as that of the temperature field, and both variation ranges decrease from the wellbore heel to the toe.
Variation of water saturation induced by steam is similar to the temperature and pressure fields. The radial
variation ranges of the reservoir temperature and pressure increase with steam injection time, but rate of
increase diminishes gradually.
关键词
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Steam injection, horizontal well, dynamic temperature field, thermo-hydro coupling model,temperature profile, pressure profile