安塞油田杏北地区长6储层敏感性评价

Sensitivity Evaluation of Chang 6 Reservoir in Xingbei Area of Ansai Oilfield

鄂尔多斯盆地杏北地区储层物性较差,属于低孔-低渗储层。利用岩性描述、薄片鉴定、扫描电镜观察、压汞实验等方法对研究区长6储层岩石学特征、物性特征、孔喉特征、黏土矿物特征等方面进行了研究,通过敏感性实验数据对研究区储层进行了评价分析,结果表明,研究区长6储层表现为无-弱速敏,无-弱水敏,无-弱盐敏,无酸敏。

The reservoirs in the Xingbei area of the Ordos Basin have poor physical properties and are lowporosity-low-permeability reservoirs.Lithology description,thin section identification,scanning electron microscope observation,mercury intrusion experiment and other methods were used to study the petrological characteristics,physical characteristics,pore throat characteristics,and clay mineral characteristics of Chang 6 reservoir in the study area.Evaluation and analysis of the reservoirs in the study area show that the Chang 6 reservoir in the study area has no-weak velocity sensitivity,no-weak water sensitivity,no-weak salt sensitivity,and no acid sensitivity.