钻探工程2025，Vol.52Issue(4)：37-45,9.DOI:10.12143/j.ztgc.2025.04.005
消泡剂X60L对油井水泥净浆物理力学性能及微观结构影响的实验研究
Experimental study about the effect of defoamer X60L on the physical and mechanical properties and microstructure of net slurry of oil well cement
摘要
Abstract
In the process of cementing mud slurry preparation,ultra-high mixing speed tends to introduce air bubbles,resulting in difficulties in formulating the cement slurry to the correct density,which in turn can adversely affect the slurry properties and the sealing integrity of the cement ring.In this paper,we take the lipid-based defoamer X60L as an example to investigate the effects of different dosages of X60L defoamer(0%,0.5%,1%,and 1.5%)on the compressive strength of oil well cement.Combined with thermogravimetric analysis,X-ray diffraction analysis,X-ray micro-computed tomography test and scanning electron microscope test,the changing law of microstructure of cement slurry can be grasped and the mechanism of defoamer's action on cement slurry can be clarified.The research results show that the compressive strength of cement stone shows a trend of increasing first and then decreasing,while the porosity shows a trend of decreasing first and then increasing.The cement stone has the lowest porosity and the highest compressive strength when the defoamer dosage is 0.5%.The larger the porosity of cement stone,the smaller the compressive strength,and the compressive strength and porosity were obviously negatively correlated and conformed to the Schiller's Function(R2=0.98).The incorporation of defoamer does not change the mineral composition and hydration products of oil well cement,and it mainly reduces the surface tension of the bubbles to makes it difficult to maintain the bubbles and thus break them.However,with the increase of defoamer dosage,too much defoamer will hinder the contact between water and cement,inhibit the hydration of cement,and introduce the"defoamer holes",which will lead to the increases of the cement stone porosity and the decreases of the compressive strength.关键词
固井水泥浆/气泡/消泡剂/微观结构/抗压强度/孔隙率Key words
cementing slurry/air bubbles/defoamer/microstructure/compressive strength/porosity分类
天文与地球科学引用本文复制引用
谷怀蒙,郑少军,刘天乐,徐浩,万涛,代天,蒋国盛..消泡剂X60L对油井水泥净浆物理力学性能及微观结构影响的实验研究[J].钻探工程,2025,52(4):37-45,9.基金项目
国家自然科学基金项目"水合物分解对深水固井水泥环孔隙特征与力学性质的影响机制研究"(编号:42072343) （编号:42072343）
国家重点研发计划"城市燃气泄漏后甲烷一体化处置关键技术装备研究"(编号:2022YFC3004804) （编号:2022YFC3004804）
国家高层次人才特殊支持计划(编号:107-KZ23Z20016) （编号:107-KZ23Z20016）
中央高校基本科研业务费专项资金(中国地质大学)优秀青年团队项目"深水天然气水合物地层安全高效固井关键技术"(编号:107-G132352304) （中国地质大学）
自然资源部复杂条件钻采技术重点实验室开放基金项目"定向先导孔偏斜率计算及工艺优化"(编号:FZJS23024) （编号:FZJS23024）
