Relationship Between Xonotlite Crystallite Size and Strength Degradation of Silica-Enriched Oil Well Cement Under 240 °C Curing Conditions.

Guodong Cheng, Lei Chen, Qian Tao, Haoguang Wei, Fuzhu Xie, Jixiang Wang, Jun Lu

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Article in Materials (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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7 authors.

Guodong ChengSINOPEC Research Institute of Petroleum Engineering Co., Ltd., Beijing 102206, China.

Lei ChenSINOPEC Research Institute of Petroleum Engineering Co., Ltd., Beijing 102206, China.

Qian TaoSINOPEC Research Institute of Petroleum Engineering Co., Ltd., Beijing 102206, China.

Haoguang WeiSINOPEC Research Institute of Petroleum Engineering Co., Ltd., Beijing 102206, China.

Fuzhu XieKey Laboratory of Advanced Civil Engineering Materials of Ministry of Education, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China.

Jixiang WangSchool of Chemical and Environmental Engineering, China University of Mining & Technology, Beijing 100083, China.

Jun LuState Pipeline Network Group Energy Storage Technology Co., Ltd., Shanghai 200011, China.

Funding

Financial support comes from National Key Science and Technology Projects No.2025ZD1402205Key Projects of the Department of Science and Technology, National Oil and Gas Pipeline Network Group Co., Ltd No.GWHT20220042236Key research project of the Science and Technology Department, Sinopec Group No. P24085Key research project of the Science and Technology Department, Sinopec Group No. P25063

6 · The paper itself

Abstract

The strength degradation of silica-enriched oil well cement under high-temperature curing conditions poses a challenge to wellbore integrity. Using the single-peak Scherrer equation, this study evaluated xonotlite crystallite size evolution in cements cured at different setting temperatures. Low-temperature setting (80 °C) maintained stable crystallite size (≈35-36 nm), accompanied by strength gain and pore refinement. High-temperature setting (240 °C) induced crystallite coarsening (up to 40 nm), concurrent with strength degradation and pore coarsening. Similar crystallite sizes led to divergent mechanical performance depending on crystal morphology, highlighting the need for combined size-morphology assessment. These findings identify xonotlite crystallite coarsening as a key indicator of high-temperature cement retrogression.

Indexed as

crystallite sizehigh-temperature curingScherrer equationsilica-enriched oil well cementsstrength degradationxonotlite

Identifiers

PMID42073815

DOI10.3390/ma19081651

PMCPMC13117802

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.