| 利用共轭梯度方法的激发极化三维快速反演 |
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| 引用本文： | 吴小平.利用共轭梯度方法的激发极化三维快速反演[J].煤田地质与勘探,2004,32(5):62-64. |
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| 作者姓名： | 吴小平 |
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| 作者单位： | 中国科学技术大学地球与空间科学学院, 安徽 合肥 230026 |
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| 基金项目： | 国家自然科学基金 (No.4 0 0 0 4 0 0 5 )，国土资源部十五重点科技项目资助 |
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| 摘 要： | 利用共轭梯度方法实现了激发极化(IP)三维快速反演。首先,利用共轭梯度方法反演电位数据,得到地下的三维电阻率模型,(由于避免了直接求偏导数矩阵,因此反演计算速度很快。)然后,以此电阻率模型为地下电导率分布,再反演IP数据得到三维极化率分布理论模型。试算结果表明其效果较好。
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| 关 键 词： | 激发极化 电阻率 三维反演 共轭梯度 |
| 文章编号： | 1001-1986(2004)05-0062-03 |
| 收稿时间： | 2004-04-06 |
| 修稿时间： | 2004年4月6日 |
Rapid 3-D inversion of induced polarization data using conjugate gradient method |
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| WU Xiao-ping.Rapid 3-D inversion of induced polarization data using conjugate gradient method[J].Coal Geology & Exploration,2004,32(5):62-64. |
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| Authors: | WU Xiao-ping |
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| Institution: | University of Science and Technology of China, School of Earth and Space Science, Hefei 230026, China |
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| Abstract: | Rapid 3D induced polarization (IP) inversions algorithm are developed using conjugate gradient (CG) relaxation techniques. At the first stage,the 3D resistivity model is recovered by inverting dc potential data using CG method, it bypasses the computation of the derivative matrix, therefore, the resistivity inversion is computed much quickly. Then, the 3D resistivity model is accepted as the distribution of subsurface resistivity to obtain a chargeability that satisfies the IP data. The algorithm is tested using synthetic model and it shows promising results. |
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| Keywords: | induced polarization resistivity 3-D inversion conjugate gradient |
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