基于宽范围岩石物性约束的大地电磁和地震联合反演

发布时间：2018-02-16 00:22

本文关键词： 联合反演岩石物性约束大地电磁地震模拟退火　出处：《地球物理学报》2016年12期 　论文类型：期刊论文

【摘要】：岩石物性约束是地球物理联合反演重要的实现方式.在以往联合反演研究中,这种约束通常以点对点的映射方式出现,要求经验性的岩石物性关联是相对精确的,无形中提高了岩石物性约束应用于联合反演的条件.基于此,本文结合全局寻优的模拟退火算法,提出了宽范围岩石物性约束技术.该技术将岩石物性约束与模拟退火模型扰动、模型接受准则相结合,实现了空间对空间的映射,将电阻率和速度耦合在一起.文章以MT和地震正则化同步联合反演为例,检验了不同的先验信息条件下的宽范围岩石物性约束技术的适用性.模型试验表明:新技术容易实现,容错性高,可降低"不精确"岩石物性关联信息引入带来的风险,提高岩石物性约束应用的灵活性.
[Abstract]:Rock physical constraint is an important way to achieve joint geophysical inversion. In previous joint inversion studies, this constraint usually appears as a point-to-point mapping method, which requires the empirical correlation of rock physical properties to be relatively accurate. The conditions for the application of physical constraints to joint inversion are improved invisibly. Based on this, a simulated annealing algorithm based on global optimization is proposed. In this paper, a wide range of rock physical constraint technique is proposed, which combines the rock physical property constraint with simulated annealing model disturbance and model acceptance criterion to realize the mapping of space to space. The resistivity and velocity are coupled together. Taking the simultaneous inversion of MT and seismic regularization as an example, the applicability of the wide range physical property constraint technique of rock under different prior information conditions is tested. The model test shows that the new technique is easy to realize. High fault tolerance can reduce the risk caused by the introduction of "imprecise" rock physical property correlation information, and improve the flexibility of the application of rock physical constraints.
【作者单位】：东华理工大学放射性地质与勘探技术国防重点学科实验室;中国地质大学(武汉)地球内部多尺度成像湖北省重点实验室;同济大学海洋地质国家重点实验室;
【基金】：同济大学海洋地质国家重点实验室开放基金(MGK1506) 中国地质大学(武汉)地球内部多尺度成像湖北省重点实验室开放基金(SMIL-2015-09) 国家自然科学基金(41604104,41504054,41504098,41664006) 江西省教育厅科学技术研究项目(GJJ150581) 东华理工大学放射性地质与勘探技术国防重点学科实验室开放基金(RGET1405);东华理工大学博士科研启动基金(DHBK201403) 国防科工局项目(科工技[2013]969号)联合资助
【分类号】：P631.4;P631.325

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