Study and Experiment on Radial Expansion and Contraction of Cement Sheath

WANG Fuyun; ZHANG Huali; ZHENG Youzhi; SONG Wenhao; HE Yu; HUANG Juan

doi:10.3969/j.issn.1001-5620.2021.01.020

Volume 38 Issue 1

Aug. 2021

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WANG Fuyun, ZHANG Huali, ZHENG Youzhi, SONG Wenhao, HE Yu, HUANG Juan. Study and Experiment on Radial Expansion and Contraction of Cement Sheath[J]. DRILLING FLUID & COMPLETION FLUID, 2021, 38(1): 122-126. doi: 10.3969/j.issn.1001-5620.2021.01.020

Citation:

WANG Fuyun, ZHANG Huali, ZHENG Youzhi, SONG Wenhao, HE Yu, HUANG Juan. Study and Experiment on Radial Expansion and Contraction of Cement Sheath[J]. DRILLING FLUID & COMPLETION FLUID, 2021, 38(1): 122-126. doi: 10.3969/j.issn.1001-5620.2021.01.020

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Study and Experiment on Radial Expansion and Contraction of Cement Sheath

doi: 10.3969/j.issn.1001-5620.2021.01.020

1. Engineering Technology Research Institute of Petrochina Southwest Oil & Gas Company, Chengdu, Sichuan 610017;
2. National Energy R&D Center of High Sulfur Gas Exploitation,, Chengdu, Sichuan 610000;
3. Development Division, Southwest Oil & Gas Field Company Development Department,, Chengdu, Sichuan 610011;
4. Sichuan Kehong Petroleum & Natural Gas Engineering Company,, Chengdu, Sichuan 610051

Received Date: 2020-10-21
Available Online: 2021-08-16

Abstract

Abstract

The radial expansion and contraction of cement sheath in oil and gas wells is one of the key factors affecting the bonding quality of the interfaces between casing string, cement sheath and borehole wall. To overcome the technical difficulties in testing the expansion and contraction characteristics of cement sheath in working conditions, the autoclave of the tester was modified and restructured to make the tester capable of measuring both axial (conventional tester) and radial expansion and contraction of the set cement. Using this new equipment, the tough anti-channeling cement slurry and the flexible self-stressing cement slurry presently in use in the Chuan-Yu area were evaluated for their expansion-contraction characteristics. The volumetric change characteristics of the cement slurry was found using the new tester and the evaluation procedure. The critical points of expansion and contraction of the cement slurry at different temperatures and pressures can be measured and used as important experimental data for selecting different cement slurries for different sections of the well. The new equipment and the data obtained with it have provided a reference for ensuring the job quality of well cementing in the Chuan-Yu area.
- Cement sheath,
- Expansion and contraction,
- Equipment modification,
- Critical point

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References(20)

References

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Study and Experiment on Radial Expansion and Contraction of Cement Sheath

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