Journal
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
Volume 191, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.petrol.2020.107171
Keywords
Wellbore heat transfer; Deep gas well; Acidizing; Rheology property; Bottom-hole temperature
Categories
Funding
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation at Southwest Petroleum University
- National Natural Science Foundation for Distinguished Young Scientists [51525404]
- National Natural Science Foundation of China [51874250]
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Real-time understanding of the wellbore temperature is a prerequisite for the acidizing treatment design. Fluid flow regime variation caused by fluid rheological property has a great influence on wellbore temperature distribution. According to the physical situation in the acidizing process, the wellbore and formation heat transfer model considering fluid rheological effects is established, the validity of the model is verified by comparing with monitoring data and previous research results. The results indicate that fluid rheology will cause the transition of flow regime, which leads to the variation of heat transfer efficiency. Considering wellbore original water is benefit for accurately predicting bottom-hole temperature. Injection rate has a great influence on fluid flow regime. A critical injection rate with the highest cooling efficiency exists in the low range of pumping rate condition. The findings above can provide theoretical insights for the deep well acidizing, and the model built in this paper is applied in field wellbore temperature simulation.
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