低渗透油气藏氮气快速排液技术及其应用  

Technology and its application of quick flowing back by nitrogen in low permeable oilgas reservoir

作　　者：刘成[1] 付万春[2] 朱红旺[2] 杲先进[1] 刘玉梅[3] 

机构地区：[1]吐哈油田公司勘探开发研究院 [2]吐哈石油勘探开发指挥部井下公司 [3]胜利油田有限公司滨南采油厂

出　　处：《油气地质与采收率》2003年第2期60-62,共3页Petroleum Geology and Recovery Efficiency

摘　　要：水敏和水锁分别是低渗透、特低渗透储层损害的主要因素 ,外来流体的侵入又是造成以上两种损害的直接原因 ,因此预防外来流体的入侵和加强已侵入流体的返排是保护低渗透油气藏的重要环节。对于深层低渗透油气藏 ,应用常规的抽汲、空气气举技术排液有很大的局限性 ,难以满足生产需求 ,为此 ,发展了以氮气气举强排和混注氮气助排为主的快速排液技术。该技术具有排液深度大、速度快、周期短的特点 ,尤其适用于低渗透油气藏。经现场应用 ,效果显著。Water sensitivity and water shutoff are the main factors of reservoir damage with low permeability and extralow permeability respectively, invasion of extraneous fluid is the direct reason of the abovementioned damage. Therefore, it is important for protection lowpermeability oil reservoir to prevent extraneous fluid from invading and strengthen flowback of the invaded fluid. Regular swabbing and air gas lift technology have great limitations in flowback of deep buried and low permeability reservoir, it can′t meet production needs. Consequently, fast flowback technology as strong flowing by nitrogen gas lift and aid flowing by mixed injection nitrogen is developed, it has features of deep flowback depth, quick speed and short cycle and is particularly applied in low permeability oil reservoir. Field application has achieved remarkable results.

关 键 词：低渗透油气藏 氮气快速排液技术 应用 储层保护 注氮气 返排 

分 类 号：TE357.7[石油与天然气工程—油气田开发工程]