New mathematical formulations for accurate estimate of nitrogen leakage rate using distributed temperature sensing in Mechanical Integrity Tests

Soliman, Eslam; Lee, Dickson; Stormont, John C.; Taha, Mahmoud Reda

doi:10.1016/j.petrol.2022.110710

Cited by 2 publications

(1 citation statement)

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“…The other is to obtain heat flux based only on DTS data by analyzing spatial temperature differences [22]. Solima et al obtained the relevant interface movement and gas flow in the string through the leakage profile developed by DTS technology and estimated the nitrogen leakage rate using the volume method and mass method [23]. Compared with the traditional temperature logging system, the estimation accuracy of the nitrogen leakage rate was improved.…”

Section: Introductionmentioning

confidence: 99%

Leakage Monitoring and Quantitative Prediction Model of Injection–Production String in an Underground Gas Storage Salt Cavern

Jiang,

Cao,

Liao

et al. 2023

Energies

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The leakage of the injection–production string is one of the important hidden dangers for the safe and efficient operation of underground salt cavern gas storage. Although distributed fiber optic temperature measurement system (DTS) can accurately locate the position of the string leakage port, how to establish the quantitative relationship between the temperature difference and leakage rate of the leakage port still needs further exploration. This paper proposes a new quantitative prediction model based on a DTS for the leakage monitoring of the injection–production string of salt cavern gas storage. The model takes into account the gas’s physical parameters, unstable temperature conditions, and the Joule–Thomson effect. In order to verify the accuracy of the model, a simulation experiment of string leakage based on a DTS was carried out. The test results show that the relative deviation between the predicted leakage rate and the measured value is less than 5% compared with the calculated value. When the leakage rate drops to 0.16 m3/h and the temperature range is less than 0.5 °C, it is difficult to accurately monitor the DTS. The results of this study help to improve the early warning time of underground salt cavern gas storage string leakage.

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Section: Introductionmentioning

confidence: 99%