Steam flow law in horizontal wells when considering reservoir heterogeneity

LI Duan; LIN Riyi; WANG Xinwei

doi:10.11949/0438-1157.20200374

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Steam flow law in horizontal wells when considering reservoir heterogeneity

Fluid dynamics and transport phenomena | 更新时间：2026-07-24

- Steam flow law in horizontal wells when considering reservoir heterogeneity
- CIESC Journal Vol. 71, Issue 12, Pages: 5479-5488(2020)
- 作者机构：
  
  中国石油大学（华东）新能源学院，山东青岛 266580
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20200374
  CLC： TE 03
- Received：10 April 2020，
  
  Revised：2020-08-16，
  
  Online First：17 December 2020，
  
  Published：05 December 2020
- 稿件说明：
移动端阅览
李端, 林日亿, 王新伟. 考虑储层非均质时注汽井内蒸汽流动规律[J]. 化工学报, 2020, 71(12): 5479-5488

LI Duan, LIN Riyi, WANG Xinwei. Steam flow law in horizontal wells when considering reservoir heterogeneity[J]. CIESC Journal, 2020, 71(12): 5479-5488
李端, 林日亿, 王新伟. 考虑储层非均质时注汽井内蒸汽流动规律[J]. 化工学报, 2020, 71(12): 5479-5488 DOI： 10.11949/0438-1157.20200374.

LI Duan, LIN Riyi, WANG Xinwei. Steam flow law in horizontal wells when considering reservoir heterogeneity[J]. CIESC Journal, 2020, 71(12): 5479-5488 DOI： 10.11949/0438-1157.20200374.

摘要

稠油热采水平井注蒸汽是一个复杂多变的过程，水平井沿程蒸汽热物性的预测对于储层的均匀动用十分关键。考虑储层渗透率、围压和蒸汽相变等条件的相互耦合影响，建立了预测水平井注汽流动的综合数学模型。与现场测井数据进行对比分析，验证了模型的准确度。模拟结果表明，单一变量条件下，水平井跟部注汽压力越大，注汽井内质量流量和蒸汽干度下降越快，当注汽压力由11 MPa降为8.5 MPa时，配汽距离增加1倍；在水平井相同位置处，跟部注汽干度越高，注汽井内质量流量越大，且蒸汽压力下降越快，注汽干度提高1倍时，压降也几乎增加1倍；跟部注汽流量越大，蒸汽压力下降越快，注汽流量提高1.75倍时压降提高了5.3倍，但管内蒸汽干度下降趋缓；储层渗透率越高，注汽井内的蒸汽干度下降越快。该模型可以为现场注汽提供理论支撑，有效提高配汽效果达到增产降耗。

Abstract

Steam injection in horizontal wells for thermal recovery of heavy oil is a complex and changeable process. The prediction of thermal properties of steam along horizontal wells is critical to the uniform production of reservoirs. In this paper

considering the mutual coupling effects of reservoir permeability

confining pressure

and steam phase transition

a comprehensive mathematical model for predicting steam injection flow in horizontal wells was established. Compared with the on-site logging data

the accuracy of the model was verified. The simulation results show that under a single variable condition

the larger the steam injection pressure at the heel

the faster the mass flow and steam dryness decrease. When the steam injection pressure drops from 11 MPa to 8.5 MPa

the steam distribution distance doubles. At the same position

the higher the steam dryness at the heel

the greater the mass flow in the steam injection well

and the faster the steam pressure decrease. Double the steam injection dryness

the pressure drop is almost doubled

but the longer steam injection distance. The larger the steam injection flow at the heel

the faster the steam pressure decreases

and the decrease in the steam dryness in the tube slows down. When the steam injection flow increases by 1.75 times

the pressure drop increases by 5.3 times. The higher the reservoir permeability

the faster the steam dryness decreases. By obtaining the general rules of steam distribution in horizontal wells to provide theoretical support for on-site steam injection

the steam distribution effect can be effectively improved to increase production and reduce consumption.

关键词

Keywords

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