Factor Analysis and Preventive Measure for Oil Well Scaling and Corrosion under Scaling in Wei-58 Block of Zhongyuan Oil Field

In the mid-post stage development of oil field, high ratio of water content leads to the increase of oil well scaling and corrosion under scaling. Through analyzing the scaling and corrosion factors, discussing the regular patterns and making protection plan, the problems of oil well scaling and corrosion under scaling were solved. Taking the oil well in Wei-58 block of Zhongyuan oil field as an example, scaling and corrosion problems were solved through adding inhibitor and optimizing agent adding method. Site survey indicated that oil well scaling and corrosion degree decreased obviously, scaling and corrosion rate dropped 60%, sum iron content dropped 70% and fluctuation weakened.