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Research on Prediction of A-Annular Pressure Buildup of Deepwater Gas Wells at the Initial Stage of Production

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Proceedings of the Fifth International Technical Symposium on Deepwater Oil and Gas Engineering (DWOG-Hyd 2023)

Part of the book series: Lecture Notes in Civil Engineering ((LNCE,volume 472))

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Abstract

In the early production stage of deepwater gas wells, the A-annular pressure increases rapidly. It approaches the casing strength limit due to high-temperature fluid, which seriously threatens the integrity and safety of the wellbore. A wellbore temperature distribution prediction model is established for the safe production of deepwater gas wells based on the energy conservation equation and the wellbore heat transfer processes. Considering the effect of temperature and pressure changes on the physical parameters of the annular fluid, the thermal expansion coefficient and isothermal compression coefficient of the annular fluid are fitted as a function of temperature and pressure, and on this basis, the prediction model and analysis method of the annular pressure during the production of deepwater gas wells are established. The A-annular pressure prediction under variable temperature and pressure conditions is realized. The results show that the prediction error of the prediction model considering only the influence of temperature is significantly greater than that of the prediction model considering the influence of temperature and pressure. The new model is suitable for the prediction of A annular pressure with different production rates and different production times. The prediction error of the model is less than 7%, which provides theoretical guidance for the formulation of the annular pressure control scheme on site.

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Abbreviations

A:

Sectional area

T:

Temperature

c:

Specific heat capacity

d:

Inside diameter

D:

Outside diameter

E:

Elastic modulus

f:

Frictional coefficient

g:

Acceleration of gravity

h:

Heat-transfer coefficient

k:

Thermal conductivity

kT:

Isothermal compressibility

L:

Length

p:

Pressure

r:

Radius

v:

Flow velocity

u:

Radial displacement

V:

Volume

w:

Mass flow

z:

Well depth

\(\alpha\):

Thermal expansion coefficient

\(\mu\):

Poisson ratio

\(\rho\):

Density

\(\theta\):

Deviation angle

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Acknowledgement

The authors gratefully acknowledge the National Natural Science Foundation (52274022).

Author information

Authors and Affiliations

  1. School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, 266580, China

    Xin Yu, Yonghai Gao, Xinxin Zhao & Youwei Zhou

  2. National Engineering Research Center for Oil and Gas Drilling and Completion Technology, China University of Petroleum (East China), Qingdao, 266580, China

    Yonghai Gao

Authors
  1. Xin Yu
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  2. Yonghai Gao
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  3. Xinxin Zhao
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  4. Youwei Zhou
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Corresponding author

Correspondence to Yonghai Gao .

Editor information

Editors and Affiliations

  1. School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong, China

    Baojiang Sun

  2. School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong, China

    Jinsheng Sun

  3. School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong, China

    Zhiyuan Wang

  4. School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong, China

    Litao Chen

  5. Editorial Office of Journal of Hydrodynamics, Shanghai, China

    Meiping Chen

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Yu, X., Gao, Y., Zhao, X., Zhou, Y. (2024). Research on Prediction of A-Annular Pressure Buildup of Deepwater Gas Wells at the Initial Stage of Production. In: Sun, B., Sun, J., Wang, Z., Chen, L., Chen, M. (eds) Proceedings of the Fifth International Technical Symposium on Deepwater Oil and Gas Engineering. DWOG-Hyd 2023. Lecture Notes in Civil Engineering, vol 472. Springer, Singapore. https://doi.org/10.1007/978-981-97-1309-7_3

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  • DOI: https://doi.org/10.1007/978-981-97-1309-7_3

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  • Print ISBN: 978-981-97-1308-0

  • Online ISBN: 978-981-97-1309-7

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