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我国不少注水开发油田都已进入特高含水阶段，水油比急剧增大，经济效益显著变差，因而迫切需要研究油井经济极限含水界限问题。文中提出了油井经济极限含水率的概念，超过这个界限，油井生产即没有经济效益。通过对几个油田的实际调查研究，得出油井经济极限含水率的计算方法和实例计算结果，并提出了对特高－超高含水井进行治理的措施建议，从而改善了油田的开发效果，提高了经济效益。
Many waterflooding oilfields in China have entered the stage of ultra-high water cut. The ratio of water to oil increases sharply, and the economic benefits are significantly deteriorated. Therefore, it is urgent to study the economic limit water cut-off of oil wells. In this paper, the concept of the economic limit moisture content of oil wells is put forward. Beyond this limit, there is no economic benefit for oil well production. Based on the actual investigation and study of several oilfields, the calculation method of economic ultimate moisture content of oil well and the calculation result of practical example are put forward, and the measures and suggestions for harnessing ultrahigh-ultrahigh water well are put forward to improve the development effect of oilfield. Improve economic efficiency.