期刊
ENERGY
卷 244, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2021.123031
关键词
Wellbore temperature; Circulation loss position; Drilling; Circulation loss monitoring
资金
- National Key Research and Development Program of China [2018YFC0310201and 2019YFC0312305]
- Natural Science Foundation of China [51976227, 2019D-5007-0216]
- PetroChina Innovation Foundation [E029020501]
- Fund of Key Laboratory of Gas Hydrate Chinese Academy of Sciences [202104910253]
- China Scholarship Council [2021A0505030053]
- Science and Technology Planning Project of Guangdong Province [20200302-07]
- PetroChina South-west Oil and Gas Field Company Postdoctoral Program [52004261]
This study investigates the influence of circulation loss at different positions on wellbore temperature distribution by establishing mathematical models. The results show that circulation loss can cause sudden temperature changes and disturbances in the wellbore, and the temperature distribution curve can be used to monitor the location of circulation loss in real time.
Circulation loss can occur at different positions during drilling, which has different effects on the wellbore temperature distribution. To ensure the safety and effectiveness of the drilling process, it is necessary to study the influence of circulation loss at different positions on the wellbore temperature distribution. In this study, we established mathematical models of wellbore temperature distribution corresponding to different situations in which circulation loss occurred and obtained the wellbore temperature distribution for each situation. When circulation loss occurred in the one-dimensional re-gion, the annulus drilling fluid temperature at the circulation loss position changed suddenly; when it occurred in the two-dimensional region, the wellbore temperature at the circulation loss position was significantly disturbed. Under other conditions unchanged, as the circulation loss occurred closer to the bottom hole, the lower the wellbore temperature became at the same well depth. After circulation loss occurred, the formation temperature in the circulation loss area decreased significantly. The difference between the wellbore temperature distribution curve after circulation loss occurs and the wellbore temperature distribution curve when no circulation loss occurred can be used to monitor the location of the circulation loss in real time. (c) 2022 Elsevier Ltd. All rights reserved.
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