Research On Comprehensive Harness Of Casing Damaged Wells To Protect The Sustainable Development Of Daqing Oil Field

Many oil fields, such as Daqing oil field, are affected by casing damage and it is becoming a serious problem now. So researching the detection method of effective forecasting casing damage and constituting an effectual comprehensive harness program become urgent affairs.In order to achieve sustainable development and solve the problem of casing damage, this dissertation researches the comprehensive harness of casing damage for protecting sustainable development of Daqing oilfield. A comprehensive harness scheme of casing damage is put forward and analyzed which including the mechanism, inspection, prediction of casing damage and how to rehabilitate and discard the casing damage well. The major context including the following:1,Through researching a slim azimuth caliper logging tool, a new inspection technique of casing damage is provided which provides a new way for mechanism research and mending the well.2,The use of technical and economic analysis theory,this dissertation builds the techno-economic evaluation method for optimization way of inspection of casing damage, which consists of the evaluation model of technical feasibility and DEA evaluation model of technical economic efficiency. This method can assure the technique feasibility and the economy rationality about the detect technique of casing damage.3,Many prediction measures are integrated ,which can reduce the casing damage ratio of the well.4,Five supporting technology are proposed including plastic, side-tracking, removal and change of casing, reinforced, end-of-life, which improve the well casing damage repair rate;5,Using of comprehensive evaluation theory and methods, this dissertation establishes the comprehensive evaluation system of Daqing oil field casing damage comprehensive harness, which ensure the economic rationality of comprehensive harness scheme of casing damage.