耐CO_2腐蚀磷铝酸盐固井水泥浆的研制  

Development and Performance of CO_2 Resistant Compound Cementing Material

作　　者：郭辛阳[1] 步玉环[1] 郭胜来[1] 马聪[1] 何英君[1] 

机构地区：[1]中国石油大学(华东)石油工程学院

出　　处：《钻井液与完井液》2014年第5期67-70,100,共4页Drilling Fluid & Completion Fluid

基　　金：山东省自然科学基金(ZR2010EM003);中央高校基本科研业务费专项资金(12CX04020A)

摘　　要：针对目前固井水泥石耐CO2腐蚀不足的问题,根据不同特种胶凝材料水化产物耐CO2腐蚀性能的差异,优选出耐CO2腐蚀好的特种胶凝材料——磷铝酸盐水泥。为了进一步改善磷铝酸盐水泥石的耐腐蚀性能,基于酸基热液反应原理,在磷铝酸盐水泥中引入磷酸盐SHP,优化其水化产物组成和改善水泥石的耐CO2腐蚀性能。同时选用复合缓凝剂CSB和聚合物降失水剂AADI来调节耐CO2腐蚀复合固井材料的性能。结果表明,复合材料的稠化性能和失水性能可调,且性能对添加剂加量的敏感程度能够满足工程要求,具有"直角稠化"的特点,失水量能控制在50 mL以内,静胶凝强度"过渡时间"短,具有优良的耐CO2腐蚀性能。A phosphoaluminate is selected for use in well cementing because of its good performance in CO2 rich environment. Based on acid-base hydrothermal reaction principle, a phosphate, SHP, was added to the phosphoaluminate to optimize the composition of the hydrate of the phosphoaluminate and to improve the anti-corrosion performance of the set cement. The phosphoaluminate was further treated with compound retarder CBS and a polymer fluid reducer AADI to improve the performance of the phosphoaluminate. The thickening capacity and filtration characteristics of the phosphoaluminate are adjustable, and the sensitiveness of change of performance to the amount of the additives added can satisfy the engineering requirements. The formulated phosphoaluminate has a short transient time, a fluid loss of less than 50 mL, and excellent performance of anti-corrosion by CO2.

关 键 词：固井耐CO2腐蚀水泥 磷铝酸盐水泥 酸基热液反应 磷酸盐 

分 类 号：TE256.6[石油与天然气工程—油气井工程]