以塔里木和大港油田区域土壤腐蚀试验数据为例 ,论证了区域腐蚀试验数据整体概率分布符合正态随机函数、其极大值数据符合Gumbel极值函数 .根据分布参数可以计算区内不同腐蚀性土壤比例、可能存在最大土壤腐蚀性和出现的概率等工程信息 Taking the soil erosion test data of Tarim and Dagang oilfields as an example, the overall probability distribution of regional corrosion test data is proved to be in accordance with the normal random function, and the maximum data is in accordance with the Gumbel extremum function.According to the distribution parameters, the different corrosive soil Proportion, there may be the greatest soil corrosion and the probability of occurrence of engineering information