唐晓明^1,2,3,,
王鹤鸣^1,3,
苏远大^1,3,
陈雪莲^1,3,,
1. 中国石油大学(华东)地球科学与技术学院, 青岛 266580
2. 青岛海洋科学与技术试点国家实验室, 青岛 266580
3. 中国石油大学(华东)深层油气重点实验室, 青岛 266580

基金项目: 国家自然科学基金（41821002），国家重点研发计划（2019YFC0605504）和中石油重大科技项目（ZD2019-183-004）联合资助


详细信息

作者简介: 唐晓明, 男, 1955年生, 教授, 博士生导师, 1982年获北京大学学士, 1984年获国家地震局地球物理研究所硕士, 1990年获麻省理工学院理学博士, 主要从事地球物理(特别是声波)测井、岩石物理学、地震波传播及测量等方面的研究和技术开发工作.E-mail: tangxiam@aliyun.com

通讯作者: 陈雪莲, 女, 1976年生, 副教授, 2006年获中国石油大学(华东)地质资源与地质工程专业博士学位, 主要从事声波测井方法及岩石物理的教学和科研工作.E-mail: chenxl@upc.edu.cn

中图分类号: P631

收稿日期:2020-12-09
修回日期:2021-04-24
上线日期:2021-08-10

Inversion for micro-pore structure distribution characteristics using cracked porous medium elastic wave theory

TANG XiaoMing^1,2,3,,
WANG HeMing^1,3,
SU YuanDa^1,3,
CHEN XueLian^1,3,,
1. School of Geosciences, China University of Petroleum, Qingdao Shandong 266580, China
2. Qingdao National Laboratory for Marine Science and Technology, Qingdao Shandong 266580, China
3. Key Laboratory of Deep Oil and Gas, China University of Petroleum, Qingdao Shandong 266580, China


More Information

Corresponding author: CHEN XueLian,E-mail:chenxl@upc.edu.cn

MSC: P631

--> Received Date: 09 December 2020
Revised Date: 24 April 2021
Available Online: 10 August 2021


摘要
摘要:“孔隙、裂隙介质的弹性波动理论”描述了介质中孔隙与裂隙相互作用的弹性波特征，已被广泛用来模拟和解释实际岩石的声学性质.本文将该理论进一步扩展，用以描述孔隙与多形态裂隙体系的相互作用.扩展理论的一个重要应用是模拟实验室流体饱和岩石在压力加载条件下的弹性波速数据，利用不同形态的裂隙在压力作用下产生的波速变化来反演裂隙的纵横比分布谱.对高孔渗砂岩、致密砂岩和花岗岩岩芯数据的反演结果清晰地反映了不同岩性的岩石中裂隙的纵横比分布特征，且与这些岩芯的扫描电镜分析结果一致.本文的研究不仅为扩展理论提供了实验验证，而且给出了一种分析岩石孔隙结构特征的有效方法.
关键词: 岩石物理/
孔裂隙介质/
孔隙分布/
孔隙纵横比谱/
弹性波传播

Abstract:The elastic wave theory of cracked porous media describes the wave propagation characteristics due to the pore-crack interaction in the medium, which has been widely used to model and explain acoustic properties of earth formation rocks. This paper further extends the theory to describe the interaction between pores and morphologically distributed cracks. An important application of this extended theory is the modeling and inversion of the laboratory elastic-wave velocity data of fluid-saturated rock samples measured under pressure loading conditions, so as to determine the morphological distribution, or the pore aspect ratio spectrum, of the pore structure. The inversion results of high porosity sandstone, tight sandstone, and granite core samples clearly reflect the pore structure distribution characteristics in different rock lithologies. The results are consistent with those from the scanning electron microscope analysis of these rock samples. This research provides not only the experimental verification for the extended theory, but also an effective method to analyze the pore structure distribution characteristics of rocks.
Key words:Rock physics/
Cracked porous media/
Pore structure/
Pore aspect ratio spectrum/
Elastic wave propagation



PDF全文下载地址:

http://www.geophy.cn/data/article/export-pdf?id=612b6b8f-60e3-4cd5-8049-17b5018a11fc