音频大地电磁测深法在贵州山区页岩气勘探中的应用

Application of Audio Magnetotelluric Sounding in Exploration of Shale Gas in Guizhou Mountain Area

页岩气常见于泥岩、高碳泥岩、页岩及粉砂质岩类夹层中,而储气层相对于围岩电阻率呈现相对低阻,并结合音频大地电磁测深法(AMT)对贵州山区页岩气的勘探实例进行分析,总结地下页岩气在地球物理特征参数下的响应特征,查明测区内页岩的电性分布规律。

Shale gas is commonly found in mudstone, high-carbon mudstone, shale and silty rock interbeds, while the resistivity of gas reservoir is relatively low compared with that of surrounding rock.Combined with audio frequency magnetotelluric sounding(AMT) method, analyzes shale gas exploration in mountainous areas of Guizhou province, summarizes the response characteristics of underground shale gas under geophysical parameters, and finds out the shale in the survey area the law of electrical distribution.