## ORIGINAL RESEARCH article

Front. Phys.
Sec. Statistical and Computational Physics
Volume 12 - 2024 | doi: 10.3389/fphy.2024.1382623

# Numerical Simulation of Superheated Steam Flow and Heat Transfer in Balanced Dual-string Steam Injection

Provisionally accepted
Qiuying Du 1* Mingzhong Li 1* Yunlong Zhao 2 Jinming Dai 2 Mingkai Liu 2 Chuxiao Miao 3
• 1 Shandong Provincial Key Laboratory of Oilfield Chemistry, College of Petroleum Engineering, China University of Petroleum, Qingdao, China
• 2 Oilfield Production Engineering Research Institute, Optimization Production Division, Oilfield Services Limited, Tianjin, China
• 3 Qingdao Energy China Resources Gas Limited Company, Qingdao, China

The final, formatted version of the article will be published soon.

For full guidelines please refer to Author Guidelines In the steam injection technology of horizontal well, the traditional single pipe steam injection process will lead to uneven steam distribution at heel end and toe end of wellbore, unbalanced development of steam cavity, and then steam channeling. The dual-string steam injection process is adopted to inject steam at heel end and toe end respectively, which can effectively improve the uneven distribution of steam cavity. In this paper, a mathematical model of steam flow and heat transfer in parallel dual-string steam injection wells in heavy oil horizontal wells is established to simulate wellbore parameters and steam reflux, and the node analysis method is used to solve the problem. Comparative analysis With the increase of steam injection time, different steam injection speed (0.5m/s, 1m/s, 1.5m/s, 2m/s, 2.5m/s), different steam injection temperature (400K, 450k, 500K, 550K) and different steam dryness (0.999, 0.998, 0.995), The variation of steam velocity and temperature in the annular space of the wellbore further reveals the steam results: Parallel dual-string steam injection process can effectively balance the steam distribution at both ends of the heel toe and reduce steam channeling. Its steam injection efficiency is closely related to wellhead steam injection speed and temperature, and steam injection temperature and steam dryness have a greater impact on wellbore heat loss. When the steam injection speed is 2m/s, the steam injection temperature is 500K and the steam dryness is 0.999, a better steam injection effect can be achieved, less energy loss and higher steam injection efficiency.

Keywords: Heavy oil reservoir1, horizontal well2, Dual-string steam injection3, Steam chamber4, numerical simulation5

Received: 05 Feb 2024; Accepted: 12 Jun 2024.

Copyright: Â© 2024 Du, Li, Zhao, Dai, Liu and Miao. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence:
Qiuying Du, Shandong Provincial Key Laboratory of Oilfield Chemistry, College of Petroleum Engineering, China University of Petroleum, Qingdao, China
Mingzhong Li, Shandong Provincial Key Laboratory of Oilfield Chemistry, College of Petroleum Engineering, China University of Petroleum, Qingdao, China

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