Abstract:  In order to improve the corrosion resistance of oil well cement in the environment of high H2S gas and improve the cement seal integrity for a long time, by adding inorganic siliceous materials and anti-corrosion polymer materials, the composite anti-corrosion material WJ-1 is formulated. Anti-corrosion performance was analyzed on the base fluid and the required additives of the cement slurry. The impressive strength and permeability before and after corrosion, microstructure and phases of the cement stone are tested. The results showthat the corrosion in liquid phase is more serious than the corrosion in gas phase, the composite corrosion resistant material WJ-1 can improve the close packing and compactness of thecement, reducethe Ca /Si ratio and the permeability of cement stone, can significantly improve the H2S corrosion resistance of cement. The cement slurry system has a good performance in rheology, stability, high temperature service, anti-channeling, and low water loss.

Key words:  , corrosion, compressive strength, permeability, corrosion resistant material, close packing

摘要： 为了改善油井水泥石在高H₂S气体环境下抗腐蚀能力，提高水泥石长期密封完整性，采用无机超细 硅质材料和聚合物防腐材料复配的方式，形成了防腐蚀复合材料WJ-1。通过对水泥基浆、加有复配的防腐蚀材 料的水泥浆体系进行了H₂S腐蚀性能评价，测定了腐蚀前后水泥石抗压强度、渗透率等性能和微观形貌及腐蚀物 相分析。结果表明，液相腐蚀比气相腐蚀更严重；抗腐蚀复合材料WJ-1提高了水泥的紧密堆积和密实度，降低了 钙硅比和水泥石的渗透率，能够明显增加水泥石的抗H₂S腐蚀能力，并且所开发的抗腐蚀水泥浆体系具有良好的 流变、稳定、抗温、防窜、低失水等综合性能。

关键词:  , 腐蚀, 抗压强度, 渗透率, 抗腐蚀材料, 紧密堆积