塔河缝洞型油藏氮气+二氧化碳吞吐先导试验PILOT TEST OF N2 & CO2 HUFF AND PUFF IN TAHE FRACTURED-VUGGY RESERVOIRS
王建海,李娣,曾文广,杨利萍,李婷婷
WANG Jianhai,LI Di,ZENG Wenguang,YANG Liping,LI Tingting
摘要(Abstract)：
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 N_2 injection EOR effects influenced by the extra viscosity oil for the fractured-vuggy reservoirs,with the help of the composite CO_2 injection,the effects stated above are improved.By means of the integrated method between indoor mechanism study and pilot test,the EOR researches of N_2 and CO_2huff-and-puff are conducted.The achievements show that the technique can play the dual roles of N_2 and CO_2 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 gready increased.The pilot test was performed in Well TH12263 for the application of the achievements,the initial daily oil production increased from10 t to 18.6 t and the admixture ratio dropped from 3.4:1 to 1.9:1,so much better viscosity-reduced and oilincreased effects are obtained.
关键词(KeyWords)：
塔河油田;缝洞型油藏;复合注气;提高采收率;先导试验
Tahe oil field;fractured-vuggy oil reservoir;composite gas injection;EOR;pilot test
基金项目(Foundation): 国家973项目“碳酸盐岩缝洞型油藏提高采收率基础研究”(2011CB201006)
作者(Author):
王建海,李娣,曾文广,杨利萍,李婷婷
WANG Jianhai,LI Di,ZENG Wenguang,YANG Liping,LI Tingting
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