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我国地质条件复杂、多样,能否充分发挥出非地震勘探技术成本低、效率高的技术优势,检验电法勘探技术在页岩气勘探中的有效性,是当前在页岩气勘探起步阶段亟待解决的重要问题之一.本文介绍了在研究和总结含气页岩密度、极化率、电阻率等岩石物理特征基础上,在四川盆地南部筠连地区开展的物性调查、时频电磁法勘探试验工作.勘探研究结果表明,本地区分布的富有机质页岩层系-志留系龙马溪组(S1l)具备开展电法勘探工作的物性条件,时频电磁法具有勘探富有机质页岩层系的能力.
The geological conditions in China are complex and diverse. Whether it can give full play to the technical advantages of low cost and high efficiency of non-seismic exploration technology and test the validity of the electrical prospecting technology in shale gas exploration is the urgent need in the initial stage of shale gas exploration One of the important problems to be solved.This paper introduces the investigation of physical properties carried out in the Junlian area in southern Sichuan Basin on the basis of researching and summarizing petrophysical characteristics of gas-bearing shale such as density, polarizability and resistivity, The results of the exploration show that the organic-rich shale series-Silurian Longmaxi Formation (S1l) distributed in the region possesses physical properties for electrical prospecting, and the time-frequency electromagnetic method has the capability of prospecting organic-rich shale formations .