Study on and Countermeasures to the Loss of Cement Sheath Integrity in Thermal Production Wells Based on 3-D Temperature Field

LI Jin; GONG Ning; ZHANG Qilong; XU Gang; CHEN Bin; LIN Jiayu

doi:10.3969/j.issn.1001-5620.2018.05.016

Volume 35 Issue 5

Sep. 2018

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LI Jin, GONG Ning, ZHANG Qilong, XU Gang, CHEN Bin, LIN Jiayu. Study on and Countermeasures to the Loss of Cement Sheath Integrity in Thermal Production Wells Based on 3-D Temperature Field[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(5): 83-89. doi: 10.3969/j.issn.1001-5620.2018.05.016

Citation:

LI Jin, GONG Ning, ZHANG Qilong, XU Gang, CHEN Bin, LIN Jiayu. Study on and Countermeasures to the Loss of Cement Sheath Integrity in Thermal Production Wells Based on 3-D Temperature Field[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(5): 83-89. doi: 10.3969/j.issn.1001-5620.2018.05.016

Citation:

LI Jin, GONG Ning, ZHANG Qilong, XU Gang, CHEN Bin, LIN Jiayu. Study on and Countermeasures to the Loss of Cement Sheath Integrity in Thermal Production Wells Based on 3-D Temperature Field[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(5): 83-89. doi: 10.3969/j.issn.1001-5620.2018.05.016

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Study on and Countermeasures to the Loss of Cement Sheath Integrity in Thermal Production Wells Based on 3-D Temperature Field

doi: 10.3969/j.issn.1001-5620.2018.05.016

Bohai Oilfeld Research Institute, Tianjin Branch of CNOOC Ltd., Tianjin 300459

Received Date: 2018-07-05
Publish Date: 2018-09-30

Abstract

Abstract

In thermal production heavy oil well cementing operations, loss of cement sheath integrity caused by high heat load produced during steam injection results in wellhead uplift. This phenomenon, which is widely found in the development of offshore thermal production heavy oil wells, and is of great harm, imposes great impact on the production life of the well and results in well control risks. Research work has been conducted on the cement sheath integrity of the thermal production wells in Bohai oilfeld. Based on heat transfer analyses, a 3D temperature feld analysis model for heat injection wellbore and a model for the cement sheath integrity analysis under the condition of coupling of heat load, load of nitrogen injection and non-uniform in-situ stresses have been developed. Measures for enhancing the integrity of cement sheath in thermal production well have been presented from drilling fluid, feld operation techniques and the performance of the thermal insulated tubing etc. Application of the models and the measures showed that the 3D temperature feld profle of a thermal production steam injection well can be effectively simulated, the damage mechanisms of the integrity of the cement sheath and the failure type of the cement sheath under heat load can be determined. This study is of reference to the development of new thermal production wells, and has wide application prospects.
- Thermal production of heavy oil,
- Heat stress,
- Integrity of cement sheath,
- 3D temperature feld,
- Well cementing,
- Offshore oilfeld

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References(23)

References

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Study on and Countermeasures to the Loss of Cement Sheath Integrity in Thermal Production Wells Based on 3-D Temperature Field

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Study on and Countermeasures to the Loss of Cement Sheath Integrity in Thermal Production Wells Based on 3-D Temperature Field

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