Design and application of foamed spacer to mitigate annular pressure induced by fluid thermal expansion

Wang, Lisong; Gao, Baokui; Hu, Tianxiang; Ma, Chao

doi:10.1016/j.applthermaleng.2019.114524

Cited by 6 publications

(4 citation statements)

References 14 publications

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“…Taking the curve under 90 × 10 4 m 3 /d as an example, the TAP is reduced from 81.61 MPa to 27.10 MPa when the nitrogen gas column length increases from zero to 5 %, while the decrease of the TAP is only 0.77 MPa (from 17.75 MPa to 16.98 MPa) when the nitrogen gas column length increases from 15 % to 20 %. This trend is consistent with the experimental results of Zhou et al [32] and Wang et al [33]. Their experiments indicated that the TAP decreases sharply when the nitrogen gas column length is within 5 % and seems stable when the nitrogen gas column length is close to 20 %.…”

Section: Mitigation Performancesupporting

confidence: 92%

Modeling analysis of the temperature profile and trapped annular pressure induced by thermal-expanded liquid in a deep gas well

Zhang¹,

Zheng²,

Deng³

et al. 2022

Front. Phys.

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The trapped annular pressure (TAP) caused by thermal expansion is one of the serious challenges for the safe production of a deep gas well. Therefore, this article proposes a model to calculate the temperature profile of the deep gas well based on the heat transfer process and the gas properties. With the help of the temperature model, the TAP in the tubing–casing annulus is analyzed according to the annular fluid distribution and the volume consistence law. The results indicate that the temperature inside the tubing string decreases faster under higher bottom hole pressure. When the tubing–casing annulus is totally filled with the annular protection liquid, the TAP continues increasing with the production rate. Considering the high production rate, the TAP is inevitable and high enough to damage the integrity of the deep gas well. The nitrogen gas mitigates the TAP by reducing the annular liquid volume and providing the extra space to accommodate the thermal-expanded annular liquid. A good mitigation performance can be achieved no matter how large the production rate is. The mitigation performance can be divided into the fast-decreasing stage, the efficient control stage, and the stable stage. These three stages occur as the nitrogen gas column length increases. The compression of the nitrogen gas volume plays a major role in the fast decrease stage while the reduction of the annular liquid plays a major role in the stable stage. For the best cost-effectiveness, the nitrogen gas column is recommended in the efficient control stage and should not exceed 15%.

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Section: Mitigation Performancesupporting

confidence: 92%

Modeling analysis of the temperature profile and trapped annular pressure induced by thermal-expanded liquid in a deep gas well

Zhang¹,

Zheng²,

Deng³

et al. 2022

Front. Phys.

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show abstract

“…The final APB in each annulus tends to be the same around 1.3MPa. In some researches, 19,21 a small gas volume fraction (about 5%) is thought to be sufficient to prevent APB since the initial gas pressure was assumed to be 1 atm. It is a valuable suggestion but dealing with the APB problem in deepwater wells is more difficult due to the special production environment.…”

Section: Open Shoementioning

confidence: 99%

“…Pressure experiments were conducted in a cylindrical container without cement to verify the model. 20,21 Hasan et al proposed a semi-steady state and a transient temperature prediction model and further analyzed APB phenomena. 22 Pattillo et al presented a 16in casing failure instance caused by APB on the Pompano A-31 well and gave the detailed analysis.…”

mentioning

confidence: 99%

“…Besides, only a few researches provide basic experiments in sealed containers and the experimental F I G U R E 1 Offshore wellbore structure studies simulating actual annuli are insufficient. [19][20][21] In this paper, the effect of cement on APB is considered and a prediction model is proposed to analyze the APB phenomena. Laboratory experiments were also conducted with a radial full-size tri-annuli setup.…”

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confidence: 99%

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Study on annular pressure buildup phenomenon in subsea wells considering the effect of cement

Wang

Zhang

Jun

et al. 2021

Energy Science & Engineering

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Marine petroleum is important fossil energy that accounts for about 34% of the total global petroleum resource. With the improvement of the exploitation technology, the production of the marine fossil resource become one of the main sources of world oil and gas production growth. Studying the engineering problems in the production of marine petroleum is of great economic significance. In the development of marine oil and gas, annular pressure buildup (APB) is an important problem that has received extensive attention. 1 In the production of the offshore oil field, the wellbore structure is constructed with casings and cement. Annuli between the casings are isolated and sealed in most wells, as is shown in Figure 1. The fluid remaining in annuli is heated when the oil and steam

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Comparison of Nitrogen Gas and Thermal-Insulation Liquid to Control the Temperature–Pressure Effect in Deep Gas Well

Zhang¹,

Cao²,

et al. 2023

Iran J Sci

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Design and application of foamed spacer to mitigate annular pressure induced by fluid thermal expansion

Cited by 6 publications

References 14 publications

Modeling analysis of the temperature profile and trapped annular pressure induced by thermal-expanded liquid in a deep gas well

Modeling analysis of the temperature profile and trapped annular pressure induced by thermal-expanded liquid in a deep gas well

Study on annular pressure buildup phenomenon in subsea wells considering the effect of cement

Comparison of Nitrogen Gas and Thermal-Insulation Liquid to Control the Temperature–Pressure Effect in Deep Gas Well

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