新型低温固井早强剂性能研究  

Study on the Performance of a New Low Temperature Early Strength Agent for Well Cement Slurries

作　　者：孟双 宋建建[1,2,3] 许明标 蒋祥光[1] 白杨 陈荣耀 MENG Shuang;SONG Jianjian;XU Mingbiao;JIANG Xiangguang;BAI Yang;CHEN Rongyao(College of Petroleum Engineering,Yangtze University,Wuhan,Hubei 430100;Hubei Key Laboratory of Drilling and Production Engineering for Oil and Gas,Wuhan,Hubei 430100;Hubei Cooperative Innovation Center of Unconventional Oil and Gas,Wuhan,Hubei 430100;No.2 Oil Production Plant of PetroChina Xinjiang Oilfield Company,Karamay,Xinjiang 834000)

机构地区：[1]长江大学石油工程学院,武汉430100 [2]油气钻采工程湖北省重点实验室,武汉430100 [3]非常规油气湖北省协同创新中心,武汉430100 [4]中石油新疆油田分公司采油二厂,新疆克拉玛依834000

出　　处：《钻井液与完井液》2023年第1期96-102,共7页Drilling Fluid & Completion Fluid

基　　金：油气田应用化学四川省重点实验室开放基金“侧链超支化早强型聚羧酸分散剂的合成及其在固井水泥浆中的作用机理研究”(YQKF202120)。

摘　　要：针对浅层低温导致水泥浆强度发展缓慢的问题,通过分散-共沉淀法制备了一种新型低温固井早强剂ES-22,并对制备早强剂的粒径及微观结构进行分析。比较了在低温条件下,新型早强剂ES-22与其他无机早强剂对水泥浆强度发展的影响,并研究了新型早强剂不同加量对水泥浆性能的影响规律。研究表明,制备的早强剂ES-22粒径主要集中在15~25μm之间。与其他早强剂相比,新型早强剂ES-22对水泥石早期抗压强度提升最大,且制备的早强剂在低温环境下对水泥石力学性能提升更大。早强剂掺入水泥浆中对水泥浆流变性影响不大,稠化时间无大幅度缩短,失水量降低。在20℃下养护24 h后,含4%早强剂水泥石的抗压强度和抗折强度比空白水泥石分别提高了204%和136%。新型早强剂在固井水泥浆中有很好的应用效果。A new low temperature early-strength agent ES-22 has been developed through dispersion-coprecipitation method to solve the slow strength development of cement slurries in shallow and low temperature well cementing.In laboratory experiment,the particle size distribution and micro-structure of ES-22 were analyzed,the effects of ES-22 and other inorganic early-strength agents on the strength development of cement slurries at low temperatures were compared.The effects of ES-22 of different concentrations on the properties of cement slurries were also studied.It was found that ES-22 has particle sizes distributed between 15μm and 25μm.Compared with other early-strength agents,ES-22 is the best early-strength agent for the development of the early compressive strength of set cement.At low temperatures,ES-22 has even greater contribution to the development of the mechanical property of the set cement.ES-22 has little,if any,effects on the rheology of the cement slurry,the thickening time of the cement slurry becomes only a little short,and the volume of filter loss is reduced.In laboratory experiment,a set cement containing 4%ES-22 had its compressive strength and flexural strength increased by 204%and 136%respectively over the compressive strength and flexural strength of the blank set cement after aging at 20℃for 24 hours.These results indicate that the early-strength agent ES-22 performs very well in oil well cement slurries.

关 键 词：水泥浆 低温 固井 早强剂 抗压强度 

分 类 号：TE256.6[石油与天然气工程—油气井工程]