关键词: 青海油田, 连续管作业机, 推广应用, 经验, 启示

Abstract: Coiled tubing unit can be widely used for drilling, well completion, oil production and workover in the oil and gas industry with a number of advantages, such as short service period, low accident rate, low damage on formation and good for reentry. However, thanks to a variety of causes, coiled tubing unit has not been widely used since it was introduced into China in the 1970s. In recent years, CNPC has launched a special project to promote application of this independentlydeveloped technology and process for coiled tubing unit. Qinghai Oilfield is one of the places selected for wider application of the technology and equipment. Based on the actual conditions of oil fields, the efforts were focused on conversion of concepts, continual development and perfection of technology, specialization of service, and enlargement of application. With high-level specialized technological service working staff, Qinghai Oilfield has developed two unique technological processes --- low-pressure gas well coiled tubing nitrogen and foam sand washing service process and coiled tubing clean out integrated service process. The workload of a single unit exceeds 120 well times per year, reaching the world’s advanced level for large-scale application and turning downhole operation from the low-end labor service to modern downhole service pattern. With remarkable economic performance achieved, application of coiled tubing unit has promoted oil and gas engineering technological development.

Key words: Qinghai Oilfield, coiled tubing unit, promotion of application, experience, enlightenment