徐深气田火山岩储层测井解释饱和度方法研究

徐深气田兴城地区深层火山岩储层岩性复杂、储层流体多变、属于特低孔隙度、特低渗透性储层。火山岩储层岩性对电阻率的影响超过储层流体对电阻率的影响,其岩电实验参数特征与砂岩储层存在着较大的差异,根据传统的阿尔奇公式难以准确求取储层的原始含气饱和度。下面以徐深气田兴城地区酸性火山岩岩电实验为例,探讨如何对传统阿尔奇公式加以改进,建立徐深气田兴城地区火山岩储层饱和度解释模型。经过多口井的实际应用,取得了较好的应用效果。

Study of the Saturation Method to the Volcanic Reservoir Well Logging Interpretation in Xushen Gas Field

The lithology of deep volcanic reservoir in Xingcheng area of Xushen gas field is complex.The reservoir fluids change a lot.They belong to super-low-porosity,super-low-permeability reservoirs.The lithology of a volcanic reservoir has more impact on resistivity than reservoir fluids.There are big differences in the experimental rock electricity parameters between volcanic reservoir and sandstone reservoir.It is difficult to get the original gas saturation accurately with Archie equation.The paper takes the rock electricity experiments of acidic vol- canics in Xingcheng area of Xushen gas field as an example to discuss how to improve traditional Archie equation and establish reservoir saturation interpretation model of Xushen gas field.Practical application in many wells has gained good effect.