摘要
为解决低渗裂缝性油藏在注水开发中出现含水率急剧上升的问题,开展水-气交注非混相驱室内实验研究。分析注入方式、气液比、温度等因素对采收率的影响。实验结果表明,氮气驱＋水-氮气交替注入段塞效果最好。气液比为1∶1-3∶1时,随着气液比增大,最终驱油效率明显提高;温度对水、氮气交注非混相驱的驱油效率有一定影响,但不明显。该研究具有较好应用、推广价值。
Experiment research of immiscible displacement by water alternating gas has been conducted for fractured reservoirs of low permeability in accordance with the problem of drastic increase of water cut in water flooding process.The influences of recovery method,gas-liquid ratio and temperature on recovery factor are analyzed.The result shows that the nitrogen flooding + water alternating nitrogen has the best effect.When the gas-liquid ratio is between 1∶1～3∶1,the ultimate recovery improves obviously with the ratio increasing.Temperature is inconspicuous to the sweep efficiency of water alternating gas immiscible displacement.This study is worthy of application and popularization.
出处
《特种油气藏》
CAS
CSCD
2010年第4期94-95,共2页
Special Oil & Gas Reservoirs
基金
国家西部开发科技行动计划重大攻关项目"陕甘宁盆地特低渗油田高效开发与水资源可持续发展关键技术研究"(2005BA901A13)
关键词
低渗透裂缝性油藏
水气交注
氮气驱
非混相驱
室内实验
low permeability fractured reservoir
water alternating gas
nitrogen flooding
immiscible displacement
laboratory experiment
