Review of gas migration and wellbore leakage in liner hanger dual barrier system: Challenges and implications for industry

Ahmed, Shawgi; Salehi, Saeed; Ezeakacha, Chinedum Peter

doi:10.1016/j.jngse.2020.103284

Cited by 19 publications

(6 citation statements)

References 32 publications

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“…However, it is difficult to measure the wellbore leakage in high-pressure gas well. Due to high temperature, corrosive fluid, and high stress, well barriers have high probability to leak, including wellhead, 21 tubing string, 11 casing string, 22,23 hanger, 24 cement, 25 and packer or valve. 26 What is more complicated, different well barriers may leak at the same time.…”

Section: Introductionmentioning

confidence: 99%

Measurement of wellbore leakage in high‐pressure gas well based on the multiple physical signals and history data: Method, technology, and application

Zhang,

Pan,

Cao

et al. 2023

Energy Science & Engineering

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Leakage is one of the most serious challenges for the safe production of high‐pressure gas wells for its high risks, including abnormal annular pressure, natural gas accumulation, and environment pollution, but available methods can hardly accurately measure the leakage type and depth, which are the key parameters for the rigless leakage repair and risk assessment. Therefore, this paper proposes a method to measure the leakage based on the characteristics, which combines qualitative and quantitative measurement together. Qualitative measurement considers the annular pressure, tubing pressure, liquid level, cement quality, and workover history. Quantitative measurement is determined by noise logging, electromagnetic logging, pressure logging, and temperature logging. The logging should be optimized according to the qualitative measurement. The method was successfully applied in high‐pressure gas well belonging to Tarim Oilfield. Two potential leakage types are provided based on the annular pressure, liquid level, cement quality, and workover history, including tubing leakage and linger hanger leakage. Based on the potential leakage types, the pressure difference, logging devices string, stopping length, and time are optimized to make the engineering logging reliable. Through measurement, two leakage points are found in tubing string. One is tubing body crack at the depth of 2724 m and the other is tubing thread leakage at the depth of 5211.7 m, which well matches the production data.

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Section: Introductionmentioning

confidence: 99%

Measurement of wellbore leakage in high‐pressure gas well based on the multiple physical signals and history data: Method, technology, and application

Zhang,

Pan,

Cao

et al. 2023

Energy Science & Engineering

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“…Sealing components such as packers and cement sheaths serve as dual barrier components. [4][5][6] Birkle and Makechnie 7 and Su et al 8 explored the failure types and mechanisms of cement sheaths using different wellbore operating procedures and tested the integrity of the upper and lower cement sheaths of the packer. Tests have shown that reducing the pressure and temperature inside the casing during the production phase is beneficial for maintaining the integrity of the cement sheath on the upper and lower parts of the packer.…”

Section: Introductionmentioning

confidence: 99%

“…In high‐pressure and high‐temperature (HPHT) deepwater and ultra‐deepwater drilling and completion projects, a sturdy dual barrier system is crucial for the integrity of oil wells and the identification of potential risks that may endanger wellbore integrity. Sealing components such as packers and cement sheaths serve as dual barrier components 4–6 . Birkle and Makechnie 7 and Su et al 8 explored the failure types and mechanisms of cement sheaths using different wellbore operating procedures and tested the integrity of the upper and lower cement sheaths of the packer.…”

Section: Introductionmentioning

confidence: 99%

Experimental and thermal‐structure coupling analysis for oil and water‐swellable packer

Huang

Liu

2023

Energy Science & Engineering

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It has been widely acknowledged that traditional packers will lose their elastic performance in the context of long periods of operation due to plastic deformation. This paper will introduce a swellable packer that can reduce the failure cases of production effectively. The deformation of the packer rubber in different media and temperatures has been analyzed. The pressure test of several packer rubber under different media is carried out in this paper. The reasonable expansion clearance between the rubber tube and the well wall is obtained by strength calculation to ensure the sealing reliability of the packer. Finally, the thermomechanical coupling calculation of the packer with different structural sizes is carried out. Experiments at different temperatures show that the higher saline concentration is associated with a lower expansion rate and a larger expansion rate in clear water. At the same time, the expansion of volume in clear water increases. In addition, the higher the external temperature is, the larger the temperature gradient is. When the temperature of the outer ring is between 100°C and 140°C, the internal temperature rises to 37°C under the thermomechanical coupling effect.

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“…A cement sheath can act as a secondary barrier element in a dual barrier (elastomer seal and cement sheath) zonal isolation system. Cement is the main physical barrier able to seal fluid flow into unintended zones from the wellbore [10] and [11]; the rubber materials can be squeezed into the annulus between the hanger and the upper casing, effectively sealing the annulus, and providing an efficient twoway pressure-bearing capacity [12] to [14].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Depth of Slip Hanger Teeth Bite into Casing and the Mechanical Properties of Casing under Different Suspension Loads in Ultra-Deep Wells

Chen¹,

Tan²,

Xiao³

2021

SV-JME

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There is great difficulty in controlling the setting load of the large-size slip casing hanger in the Northwest Oilfield in China, and a reasonable setting load is of great significance. This paper studied the relationship between slip hanger bite depth and suspension load in the Ф 273 mm WE-type slip hanger in the Northwest Oilfield in China through experiment, theoretical computation, and finite element analysis. The accuracy of the finite element model was proved by comparing the finite element simulation results with the experimental bite marks on the casing surface. The study results show that the bite mark of the slip insert in the casing is deeper in the lower part of the sitting position. When the hanging load increases from 1000 kN to 6000 kN, the maximum bite depth of the slips in the casing gradually increases with the suspension load. The residual collapse strength of the casing decreases correspondingly. When the residual collapse strength decreases to a certain value, the maximum suspension force corresponding to the bite depth of the slip insert can be obtained. Based on the finite element research results and theoretical equations, the stress distribution on the casing wall where the slips bite the deepest is obtained by derivation. The suggestions on improving the material structure of the casing under this stress were proposed. The limit of the setting load of the large-size casing wellhead for avoiding casing collapse was obtained, which is of great significance for guiding field-casing setting.

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Review of gas migration and wellbore leakage in liner hanger dual barrier system: Challenges and implications for industry

Cited by 19 publications

References 32 publications

Measurement of wellbore leakage in high‐pressure gas well based on the multiple physical signals and history data: Method, technology, and application

Measurement of wellbore leakage in high‐pressure gas well based on the multiple physical signals and history data: Method, technology, and application

Experimental and thermal‐structure coupling analysis for oil and water‐swellable packer

Investigation on the Depth of Slip Hanger Teeth Bite into Casing and the Mechanical Properties of Casing under Different Suspension Loads in Ultra-Deep Wells

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