摘要：Coda waves are usually regarded as noise in the conventional seismic exploration fields. Our work is to use the energy of coda waves to estimate the stochastic parameters of random media, which is necessary to characterize the subsurface reservoir and assess the oil or gas total volume in the heterogeneous reservoir. In this paper, we briefly present the Monte Carlo radiative transfer (MCRT) theory in acoustic media, which is often used to model the envelopes of seismic energy in approximated random media in seismology. Then, we estimate the fluctuation strength and correlation length in 2D acoustic heterogeneous media based on the MCRT simulation from the synthetic crosswell seismic data. Our results show that sufficient energy information at a range of offsets can alleviate the nonunicity of the inversion result. In order to properly balance the energy effect of direct waves and coda waves in the inversion process, we modify the objective function to compare the logarithm values of the RT envelopes and of the envelopes computed with the finite difference method. Revision of this objective function makes the inversion result more accurate and more stable. Even when there is strong noise in the envelopes of seismic data, the modified equation tends to estimate the correct values. Moreover, the estimated results of the correlation length and fluctuation strength are influenced by the type of random model used in the MCRT simulation. It is better to choose the type of random media matching the investigated medium, when we apply the MCRT simulation to estimate the stochastic parameters of the investigated medium.

关键字：coda waves Monte Carlo simulation radiative transfer theory random media stochastic parameters

ISSN号：1742-2132

卷、期、页：卷: 14 期: 3

发表日期：2017-06-01

期刊分区（SCI为中科院分区）：四区

收录情况：SCIE（科学引文索引网络版）,ESI（基本科学指标数据库）

发表期刊名称：JOURNAL OF GEOPHYSICS AND ENGINEERING

参与作者：李京南

通讯作者：孟祥翠

第一作者：王尚旭,唐跟阳,孙超

论文类型：期刊论文

论文概要：孟祥翠,王尚旭,唐跟阳,李京南,孙超，Stochastic parameter estimation of heterogeneity from crosswell seismic data based on the Monte Carlo radiative transfer theory，JOURNAL OF GEOPHYSICS AND ENGINEERING，2017，卷: 14 期: 3

论文题目：Stochastic parameter estimation of heterogeneity from crosswell seismic data based on the Monte Carlo radiative transfer theory