论文部分内容阅读
面对日趋严重的环境干扰问题,我国已有多个地震台开展井下地电阻率观测试验,以减少或消除场地中出现的各种干扰影响,这些观测试验中一般采用较短极距的四极观测装置。在四极地电阻率观测装置中,由于装置系数与电极位置及电流在空间的分布有关,因此井下地电阻率观测的装置系数不能以电极在地表的方式计算,而应针对不同的观测装置情况,以半无限空间、全空间或者不完全全空间的方式计算。本文以甘肃省天水地震台井下地电阻率观测为例,详细说明了各种不同装置情况下装置系数的计算方法,期望能为今后井下地电阻率观测提供有益的帮助。
In the face of the increasingly serious environmental disturbance, many seismological stations in our country have carried out downhole resistivity observation experiments to reduce or eliminate various interference effects in the field. In these observation tests, the quadrupoles with shorter polarities Observation device. In the quadrupole resistivity observation device, the device coefficient of the downhole resistivity observation can not be calculated by the way of the electrode at the surface because the device coefficient is related to the electrode position and the current distribution in space. Instead, To semi-infinite space, full space or incomplete way to calculate. In this paper, taking Tianshui Seismic Station of Gansu Province as an example, this paper gives a detailed description of the calculation method of device coefficients for various devices. The expectation can provide useful help for the future earth resistivity observation.