Design of thermal-insulated pipes applied in deepwater well to mitigate annular pressure build-up

Guan, Zhichuan; Zhang, Bo; Wang, Qing; Liu, Yongwang; Xu, Yuqiang; Zhang, Qi

doi:10.1016/j.applthermaleng.2015.12.030

Cited by 25 publications

(10 citation statements)

References 13 publications

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“…Three factors including temperature of annulus fluid variation, volume of annulus variation, and mass of annulus fluid variation cause the sealed annulus pressure change 16 : Three factors including temperature of annulus fluid variation, volume of annulus variation, and mass of annulus fluid variation cause the sealed annulus pressure change 16 :…”

Section: Annular Pressure Calculation Methodsmentioning

confidence: 99%

“…26,27 But the compressible foam is difficult to transfer to the drilling platform because the large volume is needed, and trip in the casing with compressible foam will face the problem of fraction drag increasing. 16,29 However, the cost of these mitigation methods is high. 28 Hollow microsphere is also a reliable mitigation method, but the precise control is difficult and it is also an expensive method.…”

Section: Comparison Of Pressure Relief Effect With Other Mitigationmentioning

confidence: 99%

“…Analytical wellbore temperature model is fast and relatively accurate, which was developed in gas-well testing, 8 two-phase fluid production, 9 and the complex wells fluid flowing. Thus, He proposed insulating tubing and casing 16 and casing additional chamber 17 for APB mitigation, using multiannulus APB prediction model with semisteady temperature prediction method to simulate the APB mitigation process. 12,13 Thus, the initial APB prediction model was formed by PVT trapped annular pressure prediction method with semisteady temperature approach.…”

Section: Introductionmentioning

confidence: 99%

“…Zhang 15 established multilayer annulus volume balance matrix to calculate trapped annulus pressure, and the APB prediction results are beyond the maximum allowable wellhead operation pressure (MAWOP), 5 which demonstrates that the APB in sealed annulus should be mitigated. Thus, He proposed insulating tubing and casing 16 and casing additional chamber 17 for APB mitigation, using multiannulus APB prediction model with semisteady temperature prediction method to simulate the APB mitigation process. Zhang 18 used semisteady temperature prediction approach to calculate APB applicated among multiple packers in HPHT gas wells.…”

Section: Introductionmentioning

confidence: 99%

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Mitigation of annular pressure buildup for deepwater wells using a recovery relief method

Tang

Chen

et al. 2019

Energy Science & Engineering

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Annular pressure buildup (APB) is induced by high‐temperature tubing fluid heating the trapped annular fluid, which leads to liquid thermal expansion at the production stage in deepwater wells. Casing would be burst or collapsed without APB mitigation. A novel recovery relief method was adopted to mitigate APB through the principle of differential pressure. To assess the application effect of the method, APB prediction model and pressure relief threshold determination method were proposed, where the transient heat transfer and volume and pressure coupling were involved. The laboratory test of the principle prototype was conducted so that the feasibility of the recovery relief method was validated. The numerical APB mitigation effect was simulated by the field example. The production simulation results indicated that the high‐temperature‐induced APB caused casing failure. The simulation of APB mitigation with both inward and outward directions demonstrated that the casings using outward mitigation method were safer with lower safe factor. Besides, comparing the mitigating effect to the rupture disk, the recovery relief method had more maximum allowable APB of annulus A. Additionally, compared to other 11 ordinary mitigation methods with the qualities of engineering reliability, technology feasibility, and economy, the recovery relief method had best mitigation performance. Therefore, the recovery relief method was recommended for APB mitigating practice.

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Section: Annular Pressure Calculation Methodsmentioning

confidence: 99%

Section: Comparison Of Pressure Relief Effect With Other Mitigationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mitigation of annular pressure buildup for deepwater wells using a recovery relief method

Tang

Chen

et al. 2019

Energy Science & Engineering

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show abstract

“…Then Hasan and Kabir improved Ramey's model by allowing for two-phase flow and using a new transient solution of overall heat transfer coefficient [28]. With consideration of the temperature effect, the annular pressure varies with the depth [29,30]. It is demonstrated that the production rate has a main influence on the pressure behavior of the annulus in a certain well [31].…”

Section: Introductionmentioning

confidence: 99%

A Novel Acoustic Liquid Level Determination Method for Coal Seam Gas Wells Based on Autocorrelation Analysis

Zhang

Fan

et al. 2017

Energies

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Abstract:In coal seam gas (CSG) wells, water is periodically removed from the wellbore in order to keep the bottom-hole flowing pressure at low levels, facilitating the desorption of methane gas from the coal bed. In order to calculate gas flow rate and further optimize well performance, it is necessary to accurately monitor the liquid level in real-time. This paper presents a novel method based on autocorrelation function (ACF) analysis for determining the liquid level in CSG wells under intense noise conditions. The method involves the calculation of the acoustic travel time in the annulus and processing the autocorrelation signal in order to extract the weak echo under high background noise. In contrast to previous works, the non-linear dependence of the acoustic velocity on temperature and pressure is taken into account. To locate the liquid level of a coal seam gas well the travel time is computed iteratively with the non-linear velocity model. Afterwards, the proposed method is validated using experimental laboratory investigations that have been developed for liquid level detection under two scenarios, representing the combination of low pressure, weak signal, and intense noise generated by gas flowing and leakage. By adopting an evaluation indicator called Crest Factor, the results have shown the superiority of the ACF-based method compared to Fourier filtering (FFT). In the two scenarios, the maximal measurement error from the proposed method was 0.34% and 0.50%, respectively. The latent periodic characteristic of the reflected signal can be extracted by the ACF-based method even when the noise is larger than 1.42 Pa, which is impossible for FFT-based de-noising. A case study focused on a specific CSG well is presented to illustrate the feasibility of the proposed approach, and also to demonstrate that signal processing with autocorrelation analysis can improve the sensitivity of the detection system.

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Coupling effect of annular volume change and non-linear fluid thermal property on annular pressure buildup in multi-layer annuluses of deepwater well

et al. 2022

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Design of thermal-insulated pipes applied in deepwater well to mitigate annular pressure build-up

Cited by 25 publications

References 13 publications

Mitigation of annular pressure buildup for deepwater wells using a recovery relief method

Mitigation of annular pressure buildup for deepwater wells using a recovery relief method

A Novel Acoustic Liquid Level Determination Method for Coal Seam Gas Wells Based on Autocorrelation Analysis

Coupling effect of annular volume change and non-linear fluid thermal property on annular pressure buildup in multi-layer annuluses of deepwater well

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