钻井液与完井液2025，Vol.42Issue(1)：110-116,7.DOI:10.12358/j.issn.1001-5620.2025.01.012
有机膦酸盐缓凝剂异常增稠油井水泥浆作用机理
Mechanisms of Organic Phosphonate Retarders to Abnormally Thicken Oil Well Cement
摘要
Abstract
Organic phosphonates are generally used as retarders for cement slurries at high temperatures in Yanchang oilfield.This paper discusses the effects of the retarder sodium ethylene-diamine tetramethylene-phosphonate(EDTMPS)on the thickening performance of the class G high-sulfur-resistant(HSR)oil-well cements from four different manufacturers.The mechanisms of EDTMPS in retarding the thickening time of the four cement slurries were investigated through hydration heat measurement,XRD experiment and solubility measurement.The results of the measurement and experiment show that in the reactions of EDTMPS with the cements,EDTMPS inhibits the solution of dihydrate gypsum and accelerates the solution of C3A,thus the retarding effect of dihydrate gypsum is inhibited and C3A becomes fast hydrated,leading to an increase in the initial consistency of the cement slurry.On the other hand,EDTMPS can accelerate the solution of hemihydrate gypsum which releases SO42-.The SO42-ions released slow down the hydration process of C3A.By adjusting the concentrations of C3A,dihydrate gypsum and hemihydrate gypsum in the class G HSR oil-well cement slurry,the compatibility of the cement slurry with EDTMPS can be improved.关键词
油井水泥/高温/有机膦酸盐/稠化性能/微观结构Key words
Oil-well cement/High temperature/Organic phosphonate/Thickening proformance/Microstructure分类
石油、天然气工程引用本文复制引用
邹亦玮,代丹,王义昕,耿晨梓,朱思佳,姚晓..有机膦酸盐缓凝剂异常增稠油井水泥浆作用机理[J].钻井液与完井液,2025,42(1):110-116,7.基金项目
中海油田服务有限公司项目"海水基固井关键外加剂的开发与机理研究"(YHB23YF004). （YHB23YF004）
