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Processes
Volume 13
Issue 8
10.3390/pr13082497
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Investigation of Temperature Drop Characteristics During the Throttling Process of Ultra-High-Pressure Condensate Gas

by
Xuezhang Feng
1,
Yingqiang Yang
1,
Tianxin Hu
1,
Dianfang Feng
1,
Huijie Song
1,
Haotian Hu
2,3,
Wenyong Shen
2,3 and
Dong Xiao
2,3,*
1
Gas Production Plant of Xinjiang Oilfield Company, Karamay 834000, China
2
Petroleum Engineering School, Southwest Pertroleum University, Chengdu 610500, China
3
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
*
Author to whom correspondence should be addressed.
Processes 2025, 13(8), 2497; https://doi.org/10.3390/pr13082497 (registering DOI)
Submission received: 22 July 2025 / Revised: 2 August 2025 / Accepted: 6 August 2025 / Published: 7 August 2025
(This article belongs to the Section Chemical Processes and Systems)
Versions Notes

Abstract

The southern margin block of the Xinjiang Oilfield represents a typical ultra-high-pressure condensate gas field. Existing surface throttling practices rely heavily on empirical experience, with the underlying throttling mechanisms remaining unclear and lacking systematic theoretical support. In this study, the TW1 Well is selected as the research subject. Based on the principle of equal total enthalpy before and after throttling—and with particular attention to the effects of condensate gas heavy components and water on enthalpy calculations—a mathematical model for throttling-induced temperature drop, tailored to ultra-high-pressure condensate gas, is developed. The model enables a systematic analysis of temperature variations throughout the throttling process. Results indicate that the pre-throttle temperature is the primary factor controlling the magnitude of temperature change, and that post-throttle temperature rise may occur due to the Joule–Thomson coefficient becoming negative under ultra-high-pressure conditions. By integrating hydrate-formation prediction with differential pressure calculations across the throttling valve, a rational production scheme is proposed. This study provides a theoretical basis for understanding the mechanisms of ultra-high-pressure condensate gas well throttling and delivers critical technical support for the scientific design and optimization of surface throttling operations.
Keywords: ultra-high-pressure condensate gas; throttling temperature drop; mathematical model; Joule–Thomson effect; hydrate prediction ultra-high-pressure condensate gas; throttling temperature drop; mathematical model; Joule–Thomson effect; hydrate prediction

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MDPI and ACS Style

Feng, X.; Yang, Y.; Hu, T.; Feng, D.; Song, H.; Hu, H.; Shen, W.; Xiao, D. Investigation of Temperature Drop Characteristics During the Throttling Process of Ultra-High-Pressure Condensate Gas. Processes 2025, 13, 2497. https://doi.org/10.3390/pr13082497

AMA Style

Feng X, Yang Y, Hu T, Feng D, Song H, Hu H, Shen W, Xiao D. Investigation of Temperature Drop Characteristics During the Throttling Process of Ultra-High-Pressure Condensate Gas. Processes. 2025; 13(8):2497. https://doi.org/10.3390/pr13082497

Chicago/Turabian Style

Feng, Xuezhang, Yingqiang Yang, Tianxin Hu, Dianfang Feng, Huijie Song, Haotian Hu, Wenyong Shen, and Dong Xiao. 2025. "Investigation of Temperature Drop Characteristics During the Throttling Process of Ultra-High-Pressure Condensate Gas" Processes 13, no. 8: 2497. https://doi.org/10.3390/pr13082497

APA Style

Feng, X., Yang, Y., Hu, T., Feng, D., Song, H., Hu, H., Shen, W., & Xiao, D. (2025). Investigation of Temperature Drop Characteristics During the Throttling Process of Ultra-High-Pressure Condensate Gas. Processes, 13(8), 2497. https://doi.org/10.3390/pr13082497

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