新型聚合物固井水泥缓凝剂的研制与性能研究  

Development and performance study of new polymer cementing cement retarder for cementing wells

作　　者：金凯 谯世均[2] 马元博 JIN Kai;QIAO Shi-jun;MA Yuan-bo(Oil&Gas Technology Research Institute,PetroChina Qinghai Oilfield Company,Dunhuang 736202,China;Engineering Technology Department,PetroChina Qinghai Oilfield Company,Dunhuang 736202,China)

机构地区：[1]中国石油青海油田公司油气工艺研究院,甘肃敦煌736202 [2]中国石油青海油田公司工程技术部,甘肃敦煌736202

出　　处：《化学工程师》2025年第2期18-21,7,共5页Chemical Engineer

基　　金：中国石油天然气股份有限公司科学研究与技术开发项目(2022B-2512):低成本化工原料生产技术研究开发与工业应用。

摘　　要：通过自由基聚合,将2-丙烯酰胺基-2-甲基丙烷磺酸(AMPSVR)和反丁烯二酸以1∶0.3的摩尔比合成用于油井水泥的高温缓凝剂共聚物(APVS),并在200℃的高温条件下,通过高温高压(HT/HP)稠度计测试缓凝剂的有效性,通过水泥滤液的Zeta电位测量和水泥浆体流变学测试进一步探究其缓凝机理。结果表明,APVS共聚物的缓凝对Ca2+有很强的结合能力,每克共聚物可以结合5g Ca^(2+),显著减少了水泥孔隙溶液中自由溶解Ca^(2+)的数量,抑制了水泥水化物的凝结。通过将APVS缓凝剂与常用的滤失剂(APVCA)混合使用发现,它们在水泥颗粒表面存在竞争性吸附。所研制的缓凝剂占据了滤失剂分子之间的空隙吸附位点,以致滤失剂的有效吸附量减少,进而降低了其性能。这一发现对于优化油井水泥配方具有重要意义。High-temperature retarder copolymer(APVS)for oil well cement was synthesized by free radical polymerization of 2-acrylamido-2-methylpropanesulfonic acid(AMPSVR)and transbutylenebisacetic acid in a molar ratio of 1∶0.3.The effectiveness of the retarder was tested by high-temperature/high-pressure(HT/HP)consistency meter at a high temperature of 200℃.The effectiveness of the retarder was further investigated by the measurement of the zeta potential of the cement filtrate and the Zeta potential measurement of cement filtrate and rheological test of cement slurry were used to further investigate the retarding mechanism.The results showed that the retardation of APVS copolymer had a strong binding capacity for calcium ions,and each gram of copolymer could bind 5g of calcium ions,which significantly reduced the amount of freely dissolved calcium ions in the cement pore solution and inhibited the cement hydrate coagulation.It was found by mixing the APVS retarder with a commonly used loss-of-filtration agent(APVCA)that they have competitive adsorption on the surface of cement particles.The developed retarder occupied the adsorption sites in the voids between the molecules of the loss-of-filtration agent,so that the effective adsorption of the loss-of-filtration agent was reduced,which in turn decreased its performance.This finding is important for the optimization of oil well cement formulations.

关 键 词：固井 缓凝 聚合物 吸附 

分 类 号：TQ172.462[化学工程—水泥工业]