ANALYSIS OF EFFECT OF DRILLING FLUID SOLID-PHASE PARTICLES ON HEAT TRANSFER PERFORMANCE IN THERMAL RESERVOIRS BASED ON REPRESENTATIVE ELEMENTARY VOLUME

Du Jiahua; Wang Zhiguo; Dong Yushuang; He Liu; Cao Jing; Zhang Yanyan

doi:10.19912/j.0254-0096.tynxb.2023-1622

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (2) : 116-123. DOI: 10.19912/j.0254-0096.tynxb.2023-1622

ANALYSIS OF EFFECT OF DRILLING FLUID SOLID-PHASE PARTICLES ON HEAT TRANSFER PERFORMANCE IN THERMAL RESERVOIRS BASED ON REPRESENTATIVE ELEMENTARY VOLUME

Du Jiahua, Wang Zhiguo, Dong Yushuang, He Liu, Cao Jing, Zhang Yanyan

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Abstract

To investigate the influence of drilling fluid solid-phase particles intruding into the geothermal reservoir on the heat transfer performance, the geothermal reservoir was divided into intrusive and original zones, and the description and characterization of reservoir parameters were carried out based on the idea of representative elementary volume （REV）. The internal and external medium REV thermal conductivity calculation models and the series-parallel and parallel-series macroscopic thermal conductivity calculation models for the intrusive zone of a pore-type thermal reservoir are proposed. Numerical calculations are carried out with sandstone thermal reservoirs, from the perspective of porosity, water content, and impurity rate dynamic change, respectively, to explore the influence on the thermal conductivity of thermal reservoirs. The results show that： when the water content and impurity rate are unchanged, the thermal conductivity of the four models constructed in this paper shows a decreasing trend with the increase of porosity; when the porosity and impurity rate are unchanged, the thermal conductivity of the four models shows a positive correlation of upward trend with the water rate; when the porosity and the water content are unchanged, the trend of the thermal conductivity of the four models with the change of the impurity rate is similar to that of the change of the water content;

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geothermal energy / thermal conductivity / porosity / representative elementary volume / drilling fluid solid-phase particles

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Du Jiahua, Wang Zhiguo, Dong Yushuang, He Liu, Cao Jing, Zhang Yanyan. ANALYSIS OF EFFECT OF DRILLING FLUID SOLID-PHASE PARTICLES ON HEAT TRANSFER PERFORMANCE IN THERMAL RESERVOIRS BASED ON REPRESENTATIVE ELEMENTARY VOLUME[J]. Acta Energiae Solaris Sinica. 2025, 46(2): 116-123 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1622

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