Nonlinear hysteretic evolution characteristics of rock deformation and permeability

被引：0
|
作者：
Tang J. [1 ]
Wang H. [1 ]
Li J. [1 ]
Su W. [1 ]
Guan J. [2 ]
机构：
[1] School of Geosciences, China University of Petroleum (East China), Qingdao, 266580, Shandong
[2] Geophysical Research Institute of Shengli Oilfield Branch Co., Dongying, 257022, Shandong
来源：
Shiyou Diqiu Wuli Kantan/Oil Geophysical Prospecting | 2017年 / 52卷 / 03期
关键词：
Cyclic loading test; Discrete memory; Hysteresis; Nonlinear constitutive behavior; Simulated annealing inversion;
D O I：
10.13810/j.cnki.issn.1000-7210.2017.03.013
中图分类号：
学科分类号：
摘要：
Rocks and other non-uniform materials have strong nonlinear elastic behavior and significant hysteresis behavior (strain-stress state with discrete memory effect). In this paper, we use multi-level and multi-stage cyclic loading test combined with theoretical analysis to study nonlinear hysteresis characteristics of the rock. We introduce the concept of Preisach-Mayergoyz (PM) density to analyze static uniaxial compression tests at values well below the critical strength, and to characterize the elasticity of materials with hysteresis in their stress-strain relationship. The PM density can be deduced from a particular force protocol following basic data treatment. Hysteresis and discrete memory effect are inherent characteristics of rocks. The PM inversion procedure is tested for simulated stress-strain data. The final theoretical analysis can give better results to explain the experimental observations. © 2017, Editorial Department OIL GEOPHYSICAL PROSPECTING. All right reserved.
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页码：509 / 515
页数：6
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