Abstract:

Volcanic-rock reservoir belongs to extremely low permeability gas reservoir. However, as with natural holes and rifts, it can be for industrial development. Relative permeability curve is an important data for dynamic analysis and numerical simulate of gas reservoir development. It illustrated by the case of a Jilin Province's volcanic-rock gas reservoir, and measured the relative permeability curve by unsteady-state water displacement by gas. The results show: It had a high bound water saturation, residual gas saturation and water saturation in isotonic point; it also had a low relative permeability in isotonic point and a low water relative permeability in endpoint; confining pressure and displacement pressure had a significant impact to the results; volcanic-rock reservoir had a serious heterogeneity.

Key words: Volcanic-rock, Extremely low permeability, Relative permeability curve, Core displacement, Unsteady-state

摘要： 火山岩储层属于特低渗透率气藏, 但是由于具有较多的天然气孔, 裂缝发育, 因此可进行工业化开
发。气水相对渗透率曲线在气藏开发的动态分析和数值模拟中是一项重要的参考资料。以吉林某火山岩气藏岩心
为例, 使用非稳态气驱水法, 测定并绘制了火山岩岩心的气水相对渗透率曲线。结果表明, 束缚水饱和度、 残余气饱
和度及等渗点处含水饱和度均较高, 等渗点处相对渗透率较低, 端点处水相相对渗透率较低; 围压及驱替压差对结
果有重要影响; 火山岩储层非均质性严重。

关键词:  火山岩; , 特低渗透率; , 相对渗透率; , 岩心驱替; , 非稳态法