【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.更多还原

【Abstract】 Petrophysical constraints play an important role in a geophysical joint inversion.A relationship of different physical properties is often used as a mapping from one physical property to another one(point to point)in a general joint inversion,which requires the empirical relationship of different physical properties is accurate.This requirement potentially reduces the flexibility of the application to the joint inversion with petrophysical constraints.In this paper,we develop a wide-range petrophysical constraints technology based on a global optimal simulated annealing(SA)algorithm.By combining model perturbation,model acceptance criterion of the SA method and petrophysical constraints,a space to space mapping is fulfilled in this method.Therefore,the physical properties of resistivity and velocity can be coupled together.And weapply this technology to a regularized synchronous joint inversion of magnetotelluric and seismic data and test the applicability of the technology based on wide-range petrophysical constraints under different priori conditions.Model tests show that the new technology is robust and easy to use.Meanwhile,the risk introduced by the incorrect relationship of physical properties is reduced,and the flexibility of the application of the petrophysical constraints is also improved.更多还原