基于双重孔隙结构的测井解释模型及应用

Well logging interpretation model based on double pores and its application

测井解释的最终目的是最大限度地确定储层中的原始含水饱和度,并以此来判断储层所含流体的性质。Archie公式是测井解释中计算含水饱和度最基本的公式。由于火山岩储层的主要储集空间为裂缝和孔洞,简单地套用Archie公式计算含水饱和度其值偏高。因此,针对火山岩储层非均质性较强的特点,对Archie公式进行了修正,并引入双孔隙参数开发了一套基于双孔隙结构的火山岩储层流体识别方法。该方法在准噶尔盆地的应用中取得了良好的效果。

The final purpose of well logging interpretation is to determine the original water saturation in reservoir, and the n define the properties of the reservoir fluids. Most of the current water saturation models are based on Archie formula. Volcanic reservoirs generally develop two types of pores, including fractures and matrix pores. If we simply use the Archie formula to calculate the water saturation, the value will be higher than the real value. This paper amended the Archie formula according to the characteristics of volcanic reservoirs, and then developed a double pores system based on oil-water identification method of volcanic reservoirs by introducing the double pores parameters. The application in Junggar Basin proves the good effect of this method.