镇北地区超低渗储层敏感性评价及机理探讨  

Sensitivity evaluation and mechanism discussion on ultra-low permeability reservoir in Zhenbei Area

作　　者：吴小斌[1] 王志峰[2] 崔智林[1] 张琰图[1] 

机构地区：[1]延安大学能源与环境工程学院,陕西延安716000 [2]中国石油长庆油田公司长南气田开发项目部,陕西西安710018

出　　处：《断块油气田》2013年第2期196-200,共5页Fault-Block Oil & Gas Field

基　　金：国家重点基础研究发展计划(973)项目"多种能源矿产共存成藏(矿)机理与富集规律研究"(2003CB214606)

摘　　要：为高效开发鄂尔多斯盆地镇北地区的超低渗储层,文中应用岩心动态流动实验,对延长组长3段砂岩储层敏感性进行了评价,结果表明,超低渗储层具有弱水敏、弱速敏、弱盐敏、中等偏强压敏和极强酸敏的特点。结合扫描电镜分析、能谱分析、X衍射等测试手段,查明了低渗储层敏感性矿物的类型、含量、形态及其分布特征,剖析了超低渗储层敏感性的成因机理。最后,针对超低渗储层岩心流动实验存在的问题作了初步探讨,认为目前在实验设备仪器、方法及评价标准等方面存在不足,需要进一步完善和改进,并建立该类储层的敏感性评价标准。In order to efficiently develop the ultra-low permeability reservoirs in Zhenbei Area of Ordos Basin, this paper begins with the sensitivity evaluation on Chang 3 Member sandstone reservoir of Yanchang Formation through the dynamic core flow tesl. The results show that the ultra-low permeability reservoir has the characteristics of weak water sensitivity, low velocity sensitivity, weak salt sensitivity, medium to strong pressure sensitivity and very strong acid sensitivity. Combined with scanning electron microscopy （SEM） analysis, energy spectrum analysis and X diffraction means, this paper finds out the type, content, shape and distribution characteristics of the sensitivity mineral in low permeability reservoir and deeply analyzes the formation mechanism of sensitivity of low permeability reservoir. Finally, the relative problems existed in core flow test for ultra-low permeability reservoirare discussed. It is considered that there are shortcomings in equipment and instrument, experimental method and evaluation standard at present, needing further improvement and establishment of the sensitivity evaluation standard.

关 键 词：超低渗 敏感性 机理探讨 延长组 鄂尔多斯盆地 

分 类 号：TE122.23[石油与天然气工程—油气勘探]