泥质砂岩复电阻率的频散特性实验

不同孔隙流体特性的岩石复电阻率频散实验，是复电阻率测井资料评价水淹层和低阻油层的岩石物理基础。通过水驱水、水驱油、油驱水的岩石复电阻率频散特性的实验研究，发现泥质砂岩的复电阻率频散特性受含油饱和度的影响较大，受地层水矿化度的影响较小，尤其是异相电阻率，受地层水矿化度的影响更小；与含水泥质砂岩相比，含油泥质砂岩的相角相对较大，且随着含油饱和度的增加而增大；含水岩石和含油岩行在频散特性上存在着较大差异。实验研究结果表明，利用基于岩石频散特性发展起来的复电阻率测井技术，可以有效地识别油水层。

Complex Resistivity Dispersion Properties Experiment of Shaly Sands

Experimental research of dispersion properties on shaly sands with different fluid properties is the petrophysical basis to evaluate the water cut or low resistivity oil-bearing formation using complex resistivity logging technique. The experimental research has been carried on the complex resistivity dispersion properties of water flooding for water, for oil and oil flooding for water. The results indicate that the influence of oil saturation on dispersion is significant and the influence of the formation water salinities is small. Especially, the influence of water salinities on the quadrature resistivity is negligible. Corresponding to water bearing shaly sands, the CRL phase angel of oil-bearing shaly sands is large. Meanwhile, it increases with the increasing oil saturation . The dispersion properties of water-bearing formation and oil-bearing formation are different. Therefore, the experimental results of dispersion properties of shaly sands show that the formation oilness can be identified effectively by complex resistivity logging developed based on the dispersion properties of the rocks.