石油钻采工艺2017，Vol.39Issue(3)：382-387,6.DOI:10.13639/j.odpt.2017.03.023
稠油蒸汽吞吐逐级深部封窜及乳化降黏复合技术
A composite technology of in-depth stepwise channeling blocking and emulsifying viscosity reduction for heavy-oil steam huff and puff
摘要
Abstract
To deal with serious steam channeling which occurs after several cycles of steam soaking in heavy oil reservoirs, emulsifying viscosity reduction technology was adopted, and consequently the recovery factor is increased significantly. To overcome the restriction and deficiency of single channeling blocking or emulsifying viscosity reduction technology, a composite technology of in-depth stepwise channeling blocking and emulsifying viscosity reduction for heavy-oil steam huff and puff was developed. The chan-neling blocking agent with different temperature resisting capacities and the emulsifying viscosity reducer with high-efficiency viscosity reducing effect were selected by means of laboratory experiments and physical simulation experiments. Then, the in-depth stepwise channeling blocking system was determined for the zones near the wellbore and far from the wellbore and that between them. It is shown from laboratory experiments that the plugging rate of stepwise channeling blocking system is higher than 99% and the viscosity reducing rate of emulsifying viscosity reduction system is higher than 95%. Its successful application in field demonstrates strongly its validity in heavy oil development improvement. It provides the theoretical basis and technical support for enhanced recovery of similar heavy oil reservoirs.关键词
稠油/蒸汽吞吐/深部封窜/乳化降黏Key words
heavy oil/steam huff and puff/deep channeling blocking/emulsifying viscosity reduction分类
能源科技引用本文复制引用
张丁涌..稠油蒸汽吞吐逐级深部封窜及乳化降黏复合技术[J].石油钻采工艺,2017,39(3):382-387,6.基金项目
十三五国家科技重大专项"大型油气田及煤层气开发"子课题"改善 SAGD 开发效果技术研究与应用"(2016ZX05012-002-005). （2016ZX05012-002-005）
