石油物探2017，Vol.56Issue(2)：232-239,8.DOI:10.3969/j.issn.1000-1441.2017.02.010
基于White模型的含气砂岩垂直入射地震响应特征分析
Analysis of seismic response characteristics from vertical incident in sandstone gas reservoir based on the White model
摘要
Abstract
Based on the White's sphere patchy saturated model and dynamic bulk modulus theory,in this paper we analysis the effect of gas saturation and permeability on seismic phase velocity and inverse quality factor in different sandstone reservoirs,including well consolidated sandstone,medium consolidated sandstone and unconsolidated sandstone.Great attenuation can be observed on phase velocity of P-wave due to the increasing of gas saturation increasing,which can be as high as hundreds of meters per second in seismic frequency band and slightly attenuation can be brought by increasing permeability.And the inverse quality factor is higher when the gas saturation and frequency are both high,which leads to greater attenuation of seismic energy.The simulation results of seismic response for 3 types of sandstome reservoirs based on the phase-shift wave equation shows by phase-shift that “time delay” on the reflection from lower interface can be observed by increasing gas saturation,especially in the unconsolidated and consolidated sandstone reservoir.Furthermore,the main frequency of seismic energy will decline when gas saturation is increased.If containing gas is at a high saturation state,the flow of fluid medium will be enhanced,resulting in greater attenuation of seismic energy by increasing permeability.关键词
斑块饱和模型/含气砂岩/含气饱和度/波动方程正演/渗透率/时间延迟Key words
patchy saturated model/gas sandstone/gas saturation/wave equation simulation/permeability/time delay分类
天文与地球科学引用本文复制引用
李世凯,文晓涛,阮韵淇,李天,张瑞,张金明..基于White模型的含气砂岩垂直入射地震响应特征分析[J].石油物探,2017,56(2):232-239,8.基金项目
国家自然科学基金石油化工联合基金(U1562111)和中国石油化工股份有限公司地球物理重点实验室开放研究基金(33550006-15-FW2099-0029)共同资助.This research is financially supported by the National Natural Science Foundation of China (Grant No.U1562111) and SINOPEC Key Laboratory of Geophysics Open Foundation(Grant No.33550006-15-FW2099-0029). （U1562111）
