| Popis: |
Out of the many well intervention jobs conducted, the focus of discussion of this paper includes two well intervention operations using digital enabled slickline services in combination with production logging operations in fields whereby bi-directional telemetry is enabled using a proprietary plastic polymer insulating coating around a conventional slickline wire. The smaller, lighter and easier slickline conveyance platform with its simplified stuffing box pressure control equipment enables direct and subsequent efficiency gains and risk reduction in providing both enhanced mechanical slickline services and an additional range of real-time downhole measurements. This combination enabled both services to be deployed in a single rigup with one digital enabled slickline unit used for both mechanical and measurement services on each well. This can reduce operational time and provide significant cost savings and a reduction in diverted and or delayed production. As an example, the real-time head tension readout was used to monitor the downhole tool movement and lift forces during the flowing survey allowing the well to be flowed at the optimal rate. Two risk mitigation devices were incorporated in the toolstring, a real-time activated release device, and an interactive jar allowing mitigation of the associated risks should the toolstring become stuck in the well. The case studies described in this paper demonstrate the ability to provide a range of intervention services, specifically in the vertical logging operations, with the real-time surface readout measurement and control usually associated with electric line operations. The surface readout capability and depth accuracy makes this system more a better fit than a conventional memory system, and due to the variety of sensors available it is comparable with an electric line production logging operation. Although the technology is for cased hole service, real-time data was also acquired in the openhole section. The operations conducted as described in this paper show that digital enabled slickline services are well on their way to becoming a proven service in enhancing operational efficiency and delivering a new level of complexity to real-time slickline deployed measurement services and control over the entire operation |
