摘要
在平板模型油水驱替实验中,从同一块砂岩中切割下3 cm×3 cm×30 cm的长方体作为砂岩标定样品,30cm×30 cm×4 cm的平板作为砂岩平板模型测量样品,经NaCl溶液浓度校正和CT扫描图像计算的饱和度值标定,由测量样品的电阻测量值就可以间接计算出它的含水饱和度。由此得到的含水饱和度分布图像能反映出平面含水饱和度的变化。这种测量方法既比声波法和微波法有更好的空间分辨能力,又比CT成像法或核磁共振成像方法更安全、低廉和易行。但该方法在高含水条件下还需提高精度,在含气时尚不能应用。
In lab experiment of oil-water displacement with plate model, a cube of 3 cm×3 cm× 30 cm as the calibration sample and a plate of 30 cm× 30 cm× 4 cm as the measurement sample are cut from a same sandstone rock. Having corrected by concentration of NaCl solution and calibrated by saturation calculated from CT scan image, its water saturation might be indirectly calculated from the resistances of the measurement sample. The distributing image of water saturation like this is able to reflect the variation of saturation in plane. The method not oniy is better in spatial resolution than acoustic and microwave method, but also is safer, cheaper and easer than CT or NMR method. However, the method needs to improve its accuracy in high water-cut condition, and still cannot be used in gas bearing sample now.
出处
《测井技术》
CAS
CSCD
2008年第3期207-210,共4页
Well Logging Technology
关键词
油水驱替实验
平板模型
电阻率
含水饱和度
oil-water displacement experiment, plate model, resistivity, water saturation