摘要
针对某典型低渗透率多裂缝型区块注水开发效果较差的现状,在非常规储层动态模拟系统和低渗透裂缝型三维平板岩心制作技术的基础上,开展了九组大型室内物理模拟驱油实验,研究了不同体系、不同轮次对低渗透裂缝型储层的调驱效果。实验结果表明,弱凝胶体系可以更好的适用低渗透裂缝型油藏环境,对储层中的微裂缝进行有效封堵,优选出"0.1%浓度的800万分子量聚合物+0.1%浓度的交联剂调剖体系溶液+保护段塞"调驱体系。该体系三轮次注入采收率可提高31.35%,同时多轮次调驱效果呈逐次递减的现象,需要结合国际油价和现场实际情况,合理地选取注入轮次。
According to the poor water flood development effects of a typical low permeability multi-fractured block, and based on the dynamic simulation experiment system and the production technology of the fractured 3D flat cores with low permeability of the unconventional reservoir, we carried out 9 groups of physical simulation flooding experiments to research the profile control effects of the fractured reservoir with low permeability in the different injection systems and injection rounds. The result showed that the weak gel system better fitted the fractured reservoir with low permeability, and plugged the micro fractures effectively. In addition, the optimized profile control system is composed of 0.1% concentration of 8 million molecular weight polymer, 0.1% concentration of the profile system solution of cross linking agent, and the protection slug. It improved 31.35 % of the oil recovery by three injec- tion rounds. Furthermore, the effects of the multi-round profile control decreased. The injected rounds should be selected reason- ably according to the international oil price and the actual situation on site.
出处
《油气藏评价与开发》
CSCD
2018年第1期44-48,共5页
Petroleum Reservoir Evaluation and Development
基金
国家自然科学基金项目"凝胶与化学剂段塞式多轮次交替注入调驱技术应用研究"(51274070)
东北石油大学研究生创新科研项目"微生物体系在多孔介质中滞留迁移规律研究"(YJSCX2016-008NEPU)
关键词
低渗透
裂缝油藏
注入轮次
调驱
室内驱油实验
low permeability, fractured reservoir, injection round, profile control, indoor displacement experiment
