摘要
低阻油层是指在同一油水系统内油层电阻率小于和近似等于围岩电阻率的绝对低阻油层；或油、水层电阻率增大率小于2的相对低阻油层。受内因及外因的共同影响，某些低阻油层测井所得到的视电阻率值往往不能反映油层真实的含油饱和度情况，因此开展非电阻率方法计算低阻油层含油饱和度研究非常重要。本文将实验室压汞曲线换算为储层条件下的毛管压力、烃柱高度与含油饱和度的关系曲线，建立含油孔隙体积与烃柱高度、孔隙度的关系曲线，进而求取含油饱和度，为准确评价储层含油性、精确计算低阻油层储量提供了保障。
Low resistivity reservoirs can be divided into two kinds:absolute low resistivity reservoir and relative one.The former resistivity is less than or approximately equal to the resistivity of surrounding rocks in the same oil and water system.And the latter is that resistivity index is smaller than 2.Because of internal cause and external cause,some apparent resistivity can not reflect the real oil saturation in low resistivity formation.It is important to calculate the oil saturation with non-resistivity metheds.In the paper the relationship of capillary pressure,hydrocarbon column height and oil saturation is established through conversing laboratory intrusive mercury curve into reservoir conditions. Then it can give accurate oil saturation.So it has provided safeguard for evaluating oil occurrence of the reservoir and prec ise reserves calculation.
出处
《国外测井技术》
2010年第1期40-42,4,共3页
World Well Logging Technology
关键词
低阻油层
烃柱高度
含油饱和度
毛管压力曲线
low resistivity reservoir
hydrocarbon column height
oil saturation
capillary pressure logs
