过程法数字岩心建模与弹性参数模拟研究

发布时间：2018-05-01 18:04

本文选题：数字岩心 + 过程法　；参考：《地球物理学进展》2017年05期

【摘要】：在数字岩石物理中数字岩心是弹性参数模拟的基础,现有的数字岩心建模方法虽然较多,但一般不能满足弹性参数模拟对骨架所提出的要求.过程法以岩石粒径分布曲线为约束条件构建数字岩心,是一种比较灵活的数字岩心建模方法.本文根据前人研究结果在过程法的压实过程中用一面状像素层表示颗粒与颗粒间的接触边界,使相邻的骨架颗粒能够相互区分,提高了数字岩心骨架结构的精细程度.在弹性参数模拟中,当变化数字岩心中的颗粒、颗粒接触边界和胶结物的弹性模量时,数字岩心的弹性模量发生相应的变化.数字岩心弹性模量的变化量与组成物质的体积含量及其弹性模量赋值有关.这说明能够利用数字岩石物理研究各种地质和环境因素对岩石弹性性质的影响.进一步分析认为,目前的建模方法对数字岩心的定义还不够充分,利用数字岩石物理解决实际地质问题尚有难度.
[Abstract]:Digital core is the foundation of elastic parameter simulation in digital rock physics. Although there are many digital core modeling methods, it can not meet the requirements of elastic parameter simulation for skeleton. The process method is a flexible digital core modeling method, which takes the rock particle size distribution curve as the constraint condition to construct digital core. In this paper, the contact boundary between particles and particles is expressed by a single pixel layer in the compaction process of the process method, according to the results of previous studies, the adjacent skeleton particles can be distinguished from each other, and the fine degree of the skeleton structure of digital core can be improved. In the simulation of elastic parameters, the elastic modulus of digital core changes when the particle, particle contact boundary and elastic modulus of cemented rock core are changed. The change of elastic modulus of digital core is related to the volume content and the value of elastic modulus. This shows that digital rock physics can be used to study the influence of various geological and environmental factors on the elastic properties of rock. Further analysis shows that the definition of digital core in current modeling method is not enough and it is difficult to use digital rock physics to solve practical geological problems.
【作者单位】：油气资源与勘探技术教育部重点实验室(长江大学);中国地质大学地球物理与空间信息学院;
【基金】：地球内部多尺度成像湖北省重点实验室开放基金(SMIL-2017-10) 国家科技重大专项课题页岩气勘探地球物理技术研究(2017ZX05036-005)联合资助
【分类号】：P618.13

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