塔河缝洞型油藏氮气+二氧化碳吞吐先导试验  

PILOT TEST OF N_2 & CO_2 HUFF AND PUFF IN TAHE FRACTURED-VUGGY RESERVOIRS

作　　者：王建海[1] 李娣[1] 曾文广[1] 杨利萍[1] 李婷婷[1] 

机构地区：[1]中国石油化工股份有限公司西北油田分公司工程技术研究院,新疆乌鲁木齐830011

出　　处：《大庆石油地质与开发》2015年第6期110-113,共4页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家973项目"碳酸盐岩缝洞型油藏提高采收率基础研究"(2011CB201006)

摘　　要：针对原油超稠影响缝洞型油藏注氮气提高采收率效果的问题,拟通过复合注入CO_2方式提高注氮气效果。利用室内机理研究和现场先导试验相结合的方法开展氮气+CO_2注气吞吐提高采收率研究。结果表明:该技术可充分发挥氮气和CO_2的双重作用,既能补充地层能量、驱替顶部剩余油,又能降低稠油黏度、改善地层流动性,从而提高缝洞型稠油油藏油井产能。应用该研究成果在塔河TH12263井开展先导试验,初期日产油量由10 t上升到18.6 t,掺稀比从3.4:1下降到1.9:1,取得了较好降黏增油效果。In the light of the problem of the Nz injection EOR effects influenced by the extra viscosity oil for the fractured-vuggy reservoirs, with the help of the composite CO2 injection, the effects stated above are improved. By means of the integrated method between indoor mechanism study and pilot test, the EOR researches of N2 and CO2 huff -and-puff are conducted. The achievements show that the technique can play the dual roles of N2 and CO2 i. e. supply the formation energy and displace the remained oil on the top, and furthermore can reduce the viscosity and improve the formation mobility, thus the productivity of the oil wells can be greatly increased. The pilot test was performed in Well TH12263 for the application of the achievements, the initial daily oil production increased from 10 t to 18. 6 t and the admixture ratio dropped from 3.4 ： 1 to 1.9 ： 1, so much better viscosity-reduced and oil- increased effects are obtained.

关 键 词：塔河油田 缝洞型油藏 复合注气 提高采收率 先导试验 

分 类 号：TE357[石油与天然气工程—油气田开发工程]