低渗透裂缝性储层应力敏感性评价  

Evaluation on stress sensitivity of the low-permeability fractured reservoirs

作　　者：马收[1] 杨其彬[1] 隋文[1] 张云[1] 刘洪磊[1] 李伟星[2] 

机构地区：[1]中国石化股份胜利油田分公司采油工艺研究院,山东东营257000 [2]中国石化股份胜利油田分公司胜利采油厂,山东东营257051

出　　处：《油气地质与采收率》2006年第5期88-90,共3页Petroleum Geology and Recovery Efficiency

摘　　要：以松辽盆地长岭凹陷腰英台油田低渗透裂缝性储层岩心为研究对象,进行了不同净围压下的应力敏感性试验,得出了该储层的临界应力值及净围压的伤害率。试验结果表明,在低渗透裂缝性多孔介质中,不同性质流体的渗透率随净围压的变化十分明显,而且其渗透率损失是不可逆的。根据试验结果有针对性地优化了压裂工艺参数及泵注程序,使得该区块压裂改造的成功率由2004年的70%提高到90%,目前已累积增产原油达1.0×104t。因此,在裂缝性低渗透储层的改造开发中应充分考虑应力敏感特性对压裂工艺和生产动态的影响,以提高该类储层的增产效果。Stress sensitivity is experimented under various net confining pressure in low - permeability fractured reservoir cores of Yaoy-ingtai Oilfield in Changling Sag of Songliao Basin. Limit stress and the damage rate of net confining pressure are obtained. The permeability of the fluids with different features changes obviously with the net confining pressure in low - permeability fractured porous media, and the loss of the permeability is inconvertible. Fracturing parameters and pumping program are optimized according to the experiment results. The success ratio of fracturing in this block improved from 70% in 2004 to 90% , and cumulative incremental oil production is up to 1. 0 × 104t at present. Therefore,the effect of the stress sensitivity on fracturing technology and production performance should be considered well during the reform of the low - permeability fractured reservoirs so as to improve the stimulation effect of this type of reservoirs.

关 键 词：低渗透 裂缝 多孔介质 应力敏感性 渗透率 压裂 

分 类 号：TE311[石油与天然气工程—油气田开发工程]