抗腐蚀水泥浆体系研究  

RESEARCH ON CORROSION PROOF CEMENT SYSTEM

作　　者：郭志勤[1] 赵庆[1] 

机构地区：[1]大港油田集团公司钻采工艺研究院,天津300280

出　　处：《石油钻采工艺》2005年第B06期26-29,共4页Oil Drilling & Production Technology

摘　　要：CO2、H2S等酸性腐蚀介质对油气井水泥环密封效果的影响,会导致套管腐蚀,减少油井寿命,为了改善和提高水泥石在酸性介质下的长期结构完整性和密封性,研究了抗腐蚀水泥浆体系。通过室内试验,对9种配方水泥浆成型后的水泥石块进行了不同龄期的CO2、H2S腐蚀,测定其抗压强度、渗透率和腐蚀深度,并进行了反光显微镜、X射线衍射分析。优选出了抗腐蚀水泥浆主要添加剂WG,同时对井下水泥石腐蚀机理进行了探讨,通过综合分析,优选出了抗腐蚀的低密度水泥浆配方,该抗腐蚀水泥浆体系不但具有抗腐蚀性,还具有良好的防气窜、降自由水、浆体稳定等综合性能,可满足不同井深条件下的固井作业需要。The CO_2,H_2S of gas well can affect seal capacity of cement mantle,a new type of corrosion proof cement system was developed.According to laboratory experiment,tested compressive resistance,permeability and corrosion depth of 9 block cement of different corrosion time with CO2and H2S,reflected light microscope and X-ray diffract analysis were also adopted.studied corrosion mechanism of cement,Optimized chief addition agent WG and formula of corrosion proof cement.It not only has excellent corrosion resistance,but also has well anti-gas breakthrough,decrease free water and well steady property.It can meet cementing requirement of different well depth conditions.

关 键 词：抗腐蚀 水泥浆 外加剂WG 室内试验 腐蚀机理 

分 类 号：TE256.1[石油与天然气工程—油气井工程]