大庆石油地质与开发2012，Vol.31Issue(4)：144-148,5.DOI:10.3969/J.ISSN.1000-3754.2012.04.030
CO2吞吐提高低渗透油藏采收率技术
CO2 HUFF-AND-PUFF EOR TECHNIQUE FOR LOW-PERMEABILITY OIL RESERVOIR
摘要
Abstract
In order to improve the effects of CO2 huff and puff in low-permeability oil reservoirs, from the viewpoint of its main influencing factor on oil-flooding mechanism, the main engineering parameters, such as the cyclic injection rate, injection frequency, injection opportunity, injection pressure and so forth, which influence the effects of the huff and puff in Fuyu extra-low-permeability oil layers of Punan Oilfield in the periphery of Daqing Oilfield, are screened in the laboratory experiments. And furthermore integrating with the oilfield tests, the optimized soaking time of shutting in wells for CO2 huff and puff are determined, finally it is pointed out that the specific soaking times for each different oilfield should be adjusted according to the tubing pressure' changes in the later stage of the soakage. The optimized huff-and-puff program design has effectively guided the development of the low-permeability reservoirs in the peripheral Daqing Oilfields, the initial average incremental oil per well is 1. 1 t for 3 testing wells, the accumulative oil is up to 479 t, the researches stated above have provided the important evidence for the further enhancing oil recovery after water flooding in the low-permeability reservoirs.关键词
低渗透/CO2吞吐/工程参数/采收率Key words
low permeability/ CO2 huff-and-puff/ engineering parameter/ recovery factor分类
能源科技引用本文复制引用
马亮亮..CO2吞吐提高低渗透油藏采收率技术[J].大庆石油地质与开发,2012,31(4):144-148,5.基金项目
国家"863"计划"CO2驱油提高石油采收率与封存关键技术研究"(2009AA063404)资助. （2009AA063404）
