摘要
用两种方法对鄂尔多斯盆地南部镇泾油田长8油藏砂岩进行了应力敏感实验,实验结果表明,渗透率随有效应力的变化而变化幅度较大,内压较大时,渗透率随围压的变化而变化幅度很大。应力敏感性评价采用了三种方法,其中,采用应力敏感指数法评价储层为弱应力敏感,此法符合实际生产过程,具有参考价值。
Zhengjing oilfield Chang 8 reservoir in south of Ordos basin is ultra low permeability lithologic reservoir, experiments have been carried out based on ministry standard and modified factorial design experiment. The experimental results show that the permeability changes a lot with the effective stress. Experimental data derived from modified factorial design show that when higher inner pressure is large, permeability change greatly with confining pressure. Three methods are evaluated based onstress sensitivity evaluation. For modified factorial design experiment scheme, sensitivity is weak by using the stress sensitivity coefficient method. This method is more consistent with the actual production process, therefore has more reference value.
出处
《石油地质与工程》
CAS
2012年第4期110-112,9,共3页
Petroleum Geology and Engineering
基金
中国石油化工股份公司科技部项目(P08042)
关键词
渗透率
应力敏感性
低渗致密砂岩
有效应力
应力敏感评价
permeability
stress sensitivity
low permeable tight sandstone
effective stress
stress sensitivity evaluation
