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| Failure Mechanism and Integrity of Sand Control Screen in HeavyOil Thermal Production Well |
| Received:April 10, 2020 Revised:May 29, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2021.01.012 |
| KeyWord:thermal production well sand control screen thermal stress erosion corrosion integrity |
| Author | Institution |
| JIA Li-xin |
CNOOCChinaCo., Ltd.Tianjin Branch, Tianjin , China;State Key Laboratory of Offshore Oil Exploitation, Tianjin , China |
| HAN Yao-tu |
CNOOCChinaCo., Ltd.Tianjin Branch, Tianjin , China;State Key Laboratory of Offshore Oil Exploitation, Tianjin , China |
| CHEN Yi |
CNOOCChinaCo., Ltd.Tianjin Branch, Tianjin , China;State Key Laboratory of Offshore Oil Exploitation, Tianjin , China |
| CHEN Bin |
CNOOCChinaCo., Ltd.Tianjin Branch, Tianjin , China;State Key Laboratory of Offshore Oil Exploitation, Tianjin , China |
| XU Tao |
CNOOCChinaCo., Ltd.Tianjin Branch, Tianjin , China;State Key Laboratory of Offshore Oil Exploitation, Tianjin , China |
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| Abstract: |
| This paper aims to prevent screen damage in thermal production well and extend the validity of sand control. Based on the finite element theory, this paper studies the integrity of high quality mesh screen for thermal production well in the condition of thermal stress compensators with different quantity and spaces respectively focusing on central base pipe and outer protective cover, and the laboratory experiments are conducted to explore the failure law of the screen under the influence of corrosion and erosion. The result shows that current arrangement of thermal stress compensator fulfils requirements of mechanical integrity of central base pipe of sand control screen, while the mechanical integrity of the outer protective cover cannot be guaranteed, and screen damage cannot be avoided. It is recommended that the stress state and deformation of the outer protective cover should be fully considered in the design of the thermal stress compensator. High velocity fluid has no destructive effect on the screen, but it has erosion damage on the corrosion product film in the environment of erosion-corrosion. The condition of erosion-corrosion superposition is the main factor of erosion damage. Reasonable allocation of thermal stress compensators and material selection of screen are conducive to improving the integrity of screen and prolonging the effective period of sand control. |
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