通过高温高压腐蚀模拟试验、应力腐蚀开裂试验及电化学测试，研究了高强15Cr马氏体不锈钢在有机盐完井液中的腐蚀行为。结果表明：180℃温度下，在密度为1.4 g/cm³的有机盐完井液中腐蚀720 h，高强15Cr马氏体不锈钢的均匀腐蚀速率为0.289 8 mm/a；相同条件下高强15Cr马氏体不锈钢具有良好的耐应力腐蚀性能；当有机盐完井液密度为1.4 g/cm³，温度为30~150℃时，高强15Cr马氏体不锈钢的点蚀电位随温度升高而降低，且降低的趋势逐渐变弱；当温度为30℃，有机盐完井液的密度为1.1~1.5 g/cm³时，有机盐完井液的密度对高强15Cr马氏体不锈钢的点蚀电位几乎没有影响。

The corrosion behavior of high strength 15Cr martensitic stainless steel in organic salt completion fluid was studied by high temperature and high pressure corrosion simulation test, stress corrosion cracking test and electrochemical test. The results show that the uniform corrosion rate of high strength 15Cr martensitic stainless steel was 0.289 8 mm/a when it was corroded in the completion fluid with density of 1.4 g/cm³ and containing organic salt at 180℃ for 720 h. Under the same conditions, the high strength 15Cr martensitic stainless steel had good resistance to stress corrosion. When the density of organic salt completion fluid was 1.4 g/cm³, the pitting potential of the high strength 15Cr martensitic stainless steel decreased with the increase of temperature in the range of 30~150℃, and the decreasing trend weakened gradually. The density of organic salt completion fluid in the range of 1.1~1.5 g/cm³ had little effect on the pitting potential of the high strength 15Cr martensitic stainless steel at 30℃.