刘静^1,,
李悦静¹,
郑黎明^2,,,
蒲春生¹
1. 中国石油大学(华东)石油工程学院, 山东青岛 266580
2. 燕山大学车辆与能源学院, 河北秦皇岛 066004

基金项目: 国家自然科学基金（51874339，51904320），中央高校基本科研业务费专项资金（18CX02095A和17CX05004），山东省自然科学基金（ZR2016EEQ04），博士后基金面上项目（2018M631765），河北省博士后科研项目择优（B2018003011）资助


详细信息

作者简介: 刘静, 女, 1982年生, 讲师, 主要从事复杂油气藏物理-化学强化开采理论.E-mail:liujing4522009@163.com

通讯作者: 郑黎明, 男, 讲师, 主要从事低频波动采油技术.E-mail:zheng_liming_happy@126.com

中图分类号: P631

收稿日期:2018-04-14
修回日期:2018-10-25
上线日期:2019-09-05

A dynamic model of elastic waves propagation through porous media with water and oil seepage flow

LIU Jing^1,,
LI YueJing¹,
ZHENG LiMing^2,,,
PU ChunSheng¹
1. School of Petroleum Engineering, China University of Petroleum, Qingdao Shandong 266580, China
2. College of Vehicles and Energy, Yanshan University, Qinhuangdao Hebei 066004, China


More Information

Corresponding author: ZHENG LiMing,E-mail:zheng_liming_happy@126.com

MSC: P631

--> Received Date: 14 April 2018
Revised Date: 25 October 2018
Available Online: 05 September 2019


摘要
摘要:弹性波在储层渗流场中的传播与衰减规律是研究波场强化采油动力学机理的重要基础.基于等效流体理论和饱和静态流体弹性波传播Biot理论，建立油水两非混相流体渗流条件下储层多孔介质中弹性波传播的动力学模型，通过算例求解与分析，发现含油水两相渗流储层多孔介质中同时存在着3种纵波P1、P2、P3和1种横波S；受频率和含水饱和度的影响，各波波速和品质因子呈现出不同变化规律，4种体波波速与频率、饱和度正相关，P1、P2波品质因子与饱和度正相关，P3和S波品质因子与饱和度负相关；最后，通过与传统静态弹性波模型结果对比，进一步分析了宏观渗流场对弹性波传播特征的影响规律，为揭示低频人工地震波辅助强化采油技术的动力学机理和工艺参数优化提供了重要理论依据.
关键词: 非混相流体/
宏观渗流/
多孔介质/
弹性波传播/
动力学模型

Abstract:The propagation and attenuation of elastic waves in the seepage field of reservoirs are the major foundation for understanding the kinetic mechanism of wave-field intensified oil production technique. On the basics of the equivalent fluid theory and Biot theory,a dynamic model of elastic waves propagating through porous media with water and oil seepage flow of immiscible phases is established. The case analysis suggests that three kinds of P-waves (P1,P2 and P3) and one S-wave exist simultaneously in the porous media. Influenced by frequency and water saturation,each wave velocity and quality factor exhibit different variations. The velocities of these four body waves are positively proportional to the wave frequency and the water saturation. The attenuations of the first and the second P-waves are in positive proportion to the water saturation,while the attenuations of S-wave and the third P-wave are just opposite. The influence of the initial seepage field on elastic wave propagation characteristics is further analyzed by comparing with the traditional static model of elastic waves in porous media. This study provides a theoretical basis to reveal dynamic mechanism of the intensified oil production technique assisted with low-frequency man-made seismic waves and practical parameter optimization.
Key words:Immiscible fluid/
Macroscopic flow/
Porous media/
Elastic wave propagation/
Dynamic model



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