连续油管氮气举升工艺在鲁迈拉油田的应用

简述了牵引起下设备、滚筒、深度计量装置、井控设备、氮气泵注设备、地面流动控制设备等连续油管氮气举升作业设备以及连续油管氮气举升工艺原理及技术关键。为了高效举升和避免油层伤害,施工时应注意两点:一是开始泵注氮气时连续油管不宜下得过深,应该在较浅深度边下连续油管边注氮气;二是连续油管最大下深不宜超过射孔顶界20 m。在鲁迈拉油田应用连续油管氮气举升标准化作业流程,可以减少作业风险,有利于规范对连续油管服务商的作业管理。连续油管氮气举升是鲁迈拉油田应用最为广泛的新井、措施井投产和关停井复产技术,Ru-406井的成功应用为更好地应用氮气举升施工工艺提供了一个较好的范例。

Application of nitrogen lifting via coiled tubing in Rumaila Oilfield

The coiled tubing(CT) running system, reel and depth measurement system, well control equipment, nitrogen pumping unit and flow back package are introduced, and mechanism of nitrogen lifting and key points of operation are presented. In order to raise lifting efficiency and avoid pollution to reservoirs, two aspects should be paid attention to in operation: first is to start pumping nitrogen at a relatively low depth while running coiled tubing in, the second is coiled tubing depth should not exceed 20m below the top of perforation intervals. The application of coiled tubing standard operation procedures of nitrogen lifting in Rumaila can reduce operation risk, and normalize the management of coiled tubing service company. As the most prevailing means to put new wells or stimulation wells or shut-in wells back on production in Rumaila Oilfield, nitrogen lifting through coiled tubing can be better understood through the analysis of the case of Well Ru-406.