Optimized arrays for 2D cross-borehole electrical tomography surveys
Optimized arrays for 2D cross-borehole electrical tomography surveys
复制标题
DOI：
10.1111/1365-2478.12072
复制
发表时间：
2014-01-01
影响因子：
2.6
通讯作者：
Strutt, M.
中科院分区：
文献类型：
--
作者：
Loke, M. H.;Wilkinson, P. B.;Strutt, M.
本文探讨了利用Compare R’方法生成的优化阵列进行井间电阻率测量的方法。我们比较了两种阵列优化算法的性能，一种是最大化模型分辨率，另一种是最小化点扩散值。虽然两种算法的结果相似，但模型分辨率最大化算法的速度要快几倍。对井间测量的点扩展函数图的研究表明，在被井电极包围的中心区域内的模型分辨率远高于靠近井底端的模型分辨率。通过合成和实验数据的测试表明，Compare R'方法生成的优化阵列的分辨率明显优于以往使用的标准测量序列。如果排除在同一井眼中具有两个电流（或两个电位）电极的阵列，则优化阵列的分辨率会降低。然而，它们仍然比标准的“数组”要好。
The use of optimized arrays generated using the Compare R' method for cross-borehole resistivity measurements is examined in this paper. We compare the performances of two array optimization algorithms, one that maximizes the model resolution and another that minimizes the point spread value. Although both algorithms give similar results, the model resolution maximization algorithm is several times faster. A study of the point spread function plots for a cross-borehole survey shows that the model resolution within the central zone surrounded by the borehole electrodes is much higher than near the bottom end of the boreholes. Tests with synthetic and experimental data show that the optimized arrays generated by the Compare R' method have significantly better resolution than a standard' measurement sequence used in previous surveys. The resolution of the optimized arrays is less if arrays with both current (or both potential) electrodes in the same borehole are excluded. However, they are still better than the standard' arrays.