中国石油大学学报（自然科学版）2024，Vol.48Issue(3)：57-64,8.DOI:10.3969/j.issn.1673-5005.2024.03.006
基于三相Biot速度应力波动方程的水合物储层波场数值模拟
Numerical simulation of hydrate reservoir based on three-phase Biot velocity-stress wave equaiton
摘要
Abstract
Natural gas hydrate reservoirs are considered as three-phase porous media,comprising skeleton,hydrate,and pore water.Utilizing the three-phase Biot first-order velocity stress wave equation as the governing equation for sound wave propa-gation in gas hydrate reservoirs,numerical simulations are conducted employing the finite difference time domain(FDTD)method.The wavefield snapshots vividly illustrate three compressional waves and two shear waves,consistent with Biot̍s the-ory.Through parameter optimization of the control equation based on measured velocities,numerical velocities are aligned with measured velocities.The results highlight porosity as the most influential factor on the shear stress component of gas hy-drates,followed by impacts on hydrates,pore water,and skeleton velocities.Consequently,porosity is best analyzed using the shear stress component of gas hydrates in reservoirs.The skeleton velocity and stress components are less affected by sat-uration,while the shear stress component of gas hydrates is most affected.Therefore,the optimal choice for analyzing gas hy-drate saturation in reservoirs is the shear stress component of gas hydrates.关键词
水合物储层可视化/三相Biot波动方程/有限差分法/孔隙度/水合物饱和度/完全匹配层Key words
hydrate reservoir visualization/three-phase Biot velocity-stress wave equation/finite difference time domain(FDTD)/porosity/hydrate saturation/perfectly matched layer分类
天文与地球科学引用本文复制引用
石仁刚,魏周拓,葛新民,邓少贵,祁磊,姚志广..基于三相Biot速度应力波动方程的水合物储层波场数值模拟[J].中国石油大学学报（自然科学版）,2024,48(3):57-64,8.基金项目
CNPC重大专项(ZD2019-184-001) （ZD2019-184-001）
中央高校基本科研业务费专项(20CX05011A) （20CX05011A）
国家自然科学基金项目(42174142,42374152,41404091) （42174142,42374152,41404091）
山东省自然科学基金项目(ZR2023YQ034,ZR2020MD050) （ZR2023YQ034,ZR2020MD050）
中国石油科技创新基金项目(2021DQ02-0402) （2021DQ02-0402）
