油田采出水除垢技术研究进展OA

Oilfield produced water usually contains large amounts of inorganic salts,organic residues and suspended particles,making it highly prone to scaling during transportation,treatment and reinjection processes.Scale deposits not only block pipelines and exacerbate equipment corrosion,but also reduce system operational efficiency,directly affecting the stability of oilfield development and decreasing economic benefits.To address this issue,this paper,based on practical conditions in oilfields,summarizes the common types of scale in produced water,including mineral scale,oil scale,rust scale and microbial scale.The characteristics,advantages and disadvantages of different descaling technologies are compared,including chemical methods such as acid cleaning and chelating agents,physical methods such as ion micro-aggregation,high-pressure water jetting,ultrasonic cleaning,laser descaling and mechanical descaling,biological methods such as enzymatic agents,microbial metabolites and competitive inhibition,as well as integrated descaling technologies.With reference to field applications in oil and gas pipelines,heat exchangers and water treatment systems,the practical performance and economic feasibility of different technologies under various operating conditions are evaluated.The results show that chemical methods are currently the most widely used descaling approaches because of their rapid reaction and strong applicability,but they still have certain limitations in terms of environmental protection and cost control.In contrast,emerging technologies such as green agents and electrochemical methods have significant advantages in improving efficiency and reducing environmental burden.Therefore,greater emphasis should be placed on the integration and synergy of multiple descaling technologies,promoting the development of more intelligent and precise control systems.This will provide strong support for constructing an efficient,low-consumption and green produced-water descaling system,thereby further ensuring the safety and performance of oilfield development operations.