Open Access

ARTICLE

A Cementing Technology for Shale Oil Horizontal Wells

by Yudong Tian^1,2, Gonghui Liu¹, Yue Qi^1,2,*, Jun Li^1,3, Yan Xi^1,4, Wei Lian^1,3, Xiaojie Bai², Penglin Liu¹, Xiaoguang Geng²

1 College of Petroleum Engineering, China University of Petroleum-Beijing, Beijing, 102249, China
2 CNPC Drilling Engineering Technology Research Institute of Daqing Drilling Engineering Company, Daqing, 163413, China
3 College of Petroleum, China University of Petroleum-Beijing at Karamay, Karamay, 834000, China
4 College of Architectural Engineering, Beijing University of Technology, Beijing, 101124, China

* Corresponding Author: Yue Qi. Email:

(This article belongs to the Special Issue: Fluid Flow and Materials Strength related to the Wellbore Safety)

Fluid Dynamics & Materials Processing 2023, 19(11), 2837-2845. https://doi.org/10.32604/fdmp.2023.028805

Received 09 January 2023; Accepted 03 April 2023; Issue published 18 September 2023

Abstract

Organic rich dark shale of Q Formation can be found in many areas (e.g., in the North of S Basin). The shale target stratum is easy to hydrate and often undergoes spallation. Therefore, centering the casing in the horizontal section of the irregular borehole is relatively difficult. Similarly, achieving a good cement flushing efficiency under complex borehole conditions is a complex task. Through technologies such as centralizer, efficient preflushing, multi-stage flushing and ductile cement slurry, better performances can be achieved. In this study, it is shown that the cementing rate in the DY2H horizontal section is 97.8%, which is more than 34% higher than that of adjacent wells. This cementing matching technology for sidetracking horizontal wells can be used to improve the cementing quality of continental shale and provides a reference for future applications in this field.

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Keywords

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