三元复合吞吐和水平井组合式注汽技术在超稠油开采中的应用

介绍了三元复合吞吐技术的增油机理,并通过试验确定了CO2注入量和表面活性剂注入量工艺参数,分别为蒸汽注入量的2%和0.12%(表面活性剂浓度为0.5%)。2003～2007年,辽河油田特种油开发公司利用该技术改善超稠油开采,累计增油111997.4t。同时,利用水平井组合式注汽技术对4个井组进行了整体注汽。目前,兴H304-309组已见到增油效果,井组增油7979t,油汽比提高0.14。

Application of Steam-surfactant-CO2 Stimulation and Assemble Steam Injection Techniques for Horizontal Well in Production of Ultra-heavy Oil

The stimulation mechanism of steam-surfactant-CO2 stimulation and assemble steam injection technique are introduced in this paper.The injection rate of CO2 and surfactant is defined by test,which is 2% and 0.12% of the steam injection rate.During 2003-2007,Special Oil Development Company in Liaohe Oilfield uses this technique to improve production of ultra-heavy oil with cumulative incremental oil 111997.4t.At the same time,4 well groups are injected steam using assemble steam injection technique horizontal well.At present,the cumulative incremental oil effect of H304-309 is obvious.The incremental oil well group is 7979t and the oil-gas ratio increases 0.14.