Study on Wellbore Temperature and Pressure Distribution in Process of Gas Hydrate Mined by Polymer Additive CO2 Jet
Joint Authors
Wei, Minghui
Wu, Chenghuai
Zhou, Yanxi
Source
Advances in Polymer Technology
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-01-10
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
In order to solve the problem of hydrate reservoir collapse and hydrate regenerated in the process of solid fluidization of natural gas hydrate, a new method of natural gas hydrate exploit by high‐polymer additive (low viscosity carboxymethyl cellulose LV‐CMC) carbon dioxide jet was proposed.
The wellbore temperature and pressure changes during this process are analyzed, and the wellbore temperature and pressure model are established and solved by the state space method.
This paper also analyzed the effects of relevant parameters on hydrate decomposition, such as injection flow, temperature, and pressure.
The results show that increasing the injection pressure allows the hydrate decomposition site to be closer to the annulus outlet.
Compared with water, with polymer additive CO2 fluid as the drilling fluid, the intersection point of phase equilibrium curve and annular pressure curve is closer to annular outlet, which is obviously more conducive to well control.
In order to avoid phase changes, the injection pressure of the carbon dioxide fluid of the high‐polymer additive should not be lower than 10 MPa, and the injection temperature should not be higher than 285 K.
American Psychological Association (APA)
Wei, Minghui& Wu, Chenghuai& Zhou, Yanxi. 2020. Study on Wellbore Temperature and Pressure Distribution in Process of Gas Hydrate Mined by Polymer Additive CO2 Jet. Advances in Polymer Technology،Vol. 2020, no. 2020, pp.1-7.
https://search.emarefa.net/detail/BIM-1130211
Modern Language Association (MLA)
Wei, Minghui…[et al.]. Study on Wellbore Temperature and Pressure Distribution in Process of Gas Hydrate Mined by Polymer Additive CO2 Jet. Advances in Polymer Technology No. 2020 (2020), pp.1-7.
https://search.emarefa.net/detail/BIM-1130211
American Medical Association (AMA)
Wei, Minghui& Wu, Chenghuai& Zhou, Yanxi. Study on Wellbore Temperature and Pressure Distribution in Process of Gas Hydrate Mined by Polymer Additive CO2 Jet. Advances in Polymer Technology. 2020. Vol. 2020, no. 2020, pp.1-7.
https://search.emarefa.net/detail/BIM-1130211
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1130211