Theoretical and Experimental Study on Cementing Displacement Interface for Highly Deviated Wells

Zhiqiang Wu, Zehua Chen (), Yipeng Zhao, Yucheng Xue, Chengwen Wang, Chao Xiong and Shunli Chen
Additional contact information
Zhiqiang Wu: CNOOC Research Institute Co., Ltd., Beijing 100028, China
Zehua Chen: Key Laboratory of Unconventional Oil & Gas Development, Ministry of Education, College of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
Yipeng Zhao: CNOOC Research Institute Co., Ltd., Beijing 100028, China
Yucheng Xue: Key Laboratory of Unconventional Oil & Gas Development, Ministry of Education, College of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
Chengwen Wang: Key Laboratory of Unconventional Oil & Gas Development, Ministry of Education, College of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
Chao Xiong: Key Laboratory of Unconventional Oil & Gas Development, Ministry of Education, College of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
Shunli Chen: Key Laboratory of Unconventional Oil & Gas Development, Ministry of Education, College of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China

Energies, 2023, vol. 16, issue 2, 1-14

Abstract: An effective drilling fluid removal is necessary to achieve an efficient cementing in oil and gas industry, i.e., it is ideal that all the drilling fluid is displaced by the cement slurry. The displacement efficiency is closely related to the stability and development of the displacing interface between the cementing slurry and drilling fluid. Thus, an effective cementing requires a validated theoretical model to describe the displacing interface to guide cementing applications, especially for highly deviated wells. The current studies suffer from a lack of experimental validation for proposed models. In this study, a theoretical model of cementing interfacial displacement in eccentric annulus is established. An experimental study is conducted to examine effects of well inclination, eccentricity and fluid properties on the stability of displacement interface to verify the theoretical model. The model is found to well describe the interface in the eccentric annulus, and it is applicable to the wellbore annulus with different inclination angles. The results show that: the displacement interface gradually extends (i.e., length is increased) with the increase of well inclination; the cement displacement effect became worse with deviation angle under the same injection and replacement conditions. Increasing the apparent viscosity of cement slurry is beneficial to improve the stability of displacement interface. In highly deviated wells, a certain casing eccentricity can inhibit the penetration of cement slurry in the wide gap of the low side of the annulus, which is conducive to maintaining the stability of the displacement interface.

Keywords: highly deviated well; cementing; displacement interface; theoretical modeling; experimental verification (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/16/2/733/pdf (application/pdf)
https://www.mdpi.com/1996-1073/16/2/733/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:16:y:2023:i:2:p:733-:d:1028837

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().