准噶尔盆地盐北地区下乌尔禾组储层敏感性形成机理及评价  

Sensitivity Mechanism and Evaluation of Permian Lower Urho Formation Reservoir in Yanbei Area,Junggar Basin

作　　者：王剑 周基贤 刘明 杨红霞 杨召 廖健德 

机构地区：[1]新疆油田分公司实验检测研究院,新疆克拉玛依834000

出　　处：《非常规油气》2018年第1期28-34,共7页Unconventional Oil & Gas

基　　金：国家自然科学基金"地质历史时期碎屑岩储层物性参数恢复的定量研究"(41272157)资助

摘　　要：盐北地区下乌尔禾组储层为低孔低渗,孔喉结构较差,其产液量受储层敏感性影响较大。通过岩心动态流动试验,对盐北地区下乌尔禾储层敏感性进行分析。结果表明,玛东2井区具有中等偏强水敏、中等偏弱速敏、无—弱酸敏、高临界盐度的特征,夏盐2井区具有弱潜在水敏、中等偏弱速敏、中等偏弱酸敏的特征。结合扫描电镜分析、X衍射等测试手段,查明了储层敏感性矿物的类型、含量、形态及其分布特征,剖析了储层敏感性的成因机理。最后,针对不同井区不同的敏感性特征,提出了相应的储层保护措施,为储层的合理评价和开发提供依据。In Yanbei area,the reservoir belongs to low porosity and permeability reservoir,whose pore throat structure is poor and liquids production influenced by reservoir sensitivity.Through the dynamic core flow test,we analyzed the reservoir sensitivity.The results showed that the lower Urho formation reservoir in well Madong-2 zone had the characteristics of medium to strong water sensitivity,medium to weak velocity sensitivity,no-weak acid sensitivity and high critical salinity.Meanwhile the reservoir in well Xiayan-2 zone had the characteristics of weak potential water sensitivity,medium to weak velocity sensitivity and medium to weak acid sensitivity.Combined with scanning electron microscopy(SEM)analysis and X-diffraction means,we found out the type,content shape and distribution characteristics of the sensitivity mineral and deeply analyzed the formation mechanism of sensitivity.Finally,in regard to different sensitivity characteristics of each well zone,proposed the corresponding reservoir protection measures,provided a reasonable basis for the evaluation and development of reservoirs.

关 键 词：盐北地区 下乌尔禾组 敏感性 形成机理 评价 

分 类 号：P624.6[天文地球—地质矿产勘探]