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Facies-constrained prestack seismic probabilistic inversion driven by rock physics

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Science China Earth Sciences 2020年第6期63卷 822-840页

作者： Kun LI Xingyao YIN zhaoyun zong School of Geosciences China University of Petroleum(East China)Qingdao 266580China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China

Seismic Rock physics plays a bridge role between the rock moduli and physical properties of the hydrocarbon *** seismic inversion is an important method for the quantitative characterization of elasticity,physical properties,lithology and fluid properties of subsurface *** this paper,a high order approximation of rock physics model for clastic rocks is established and one seismic AVO reflection equation characterized by the high order approximation(Jacobian and Hessian matrix)of rock moduli is ***,the contribution of porosity,shale content and fluid saturation to AVO reflectivity is *** feasibility of the proposed AVO equation is discussed in the direct estimation of rock physical *** the basis of this,one probabilistic AVO inversion based on differential evolution-Markov chain Monte Carlo stochastic model is proposed on the premise that the model parameters obey Gaussian mixture probability prior *** stochastic model has both the global optimization characteristics of the differential evolution algorithm and the uncertainty analysis ability of Markov chain Monte Carlo *** the cross parallel of multiple Markov chains,multiple stochastic solutions of the model parameters can be obtained simultaneously,and the posterior probability density distribution of the model parameters can be simulated *** posterior mean is treated as the optimal solution of the model to be ***,the variance and confidence interval are utilized to evaluate the uncertainties of the estimated results,so as to realize the simultaneous estimation of reservoir elasticity,physical properties,discrete lithofacies and dry rock *** validity of the proposed approach is verified by theoretical tests and one real application case in eastern China.

关键词： Prestack seismic inversion Seismic rock physics Physical properties estimation Bayesian inference Probabilistic mixture model Markov chain Monte Carlo

Improving seismic interpretation: a high-contrast approximation to the reflection coefficient of a plane longitudinal wave

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Petroleum Science 2013年第4期10卷 466-476页

作者： Yin Xingyao zong zhaoyun Wu Guochen China University of Petroleum

Linearized approximations of reflection and transmission coefficients set a foundation for amplitude versus offset（AVO） analysis and inversion in exploration ***,the weak properties contrast hypothesis of those linearized approximate equations leads to big errors when the two media across the interface vary *** extend the application of AVO analysis and inversion to high contrast between the properties of the two layers,we derive a novel nonlinearized high-contrast approximation of the PP-wave reflection coefficient,which establishes the direct relationship between PPwave reflection coefficient and P-wave velocities,S-wave velocities and densities across the interface.（A PP wave is a reflected compressional wave from an incident compressional wave（P-wave）.） This novel approximation is derived from the exact reflection coefficient equation with Taylor expansion for the incident *** tests demonstrate that,compared with the reflection coefficients of the linearized approximations,the reflection coefficients of the novel nonlinearized approximate equation agree with those of the exact PP equation better for a high contrast interface with a moderate incident ***,we introduce a nonlinear direct inversion method utilizing the novel reflection coefficient equation as forward solver,to implement the direct inversion for the six parameters including P-wave velocities,S-wave velocities,and densities in the upper and lower layers across the *** nonlinear inversion algorithm is able to estimate the inverse of the nonlinear function in terms of model parameters directly rather than in a conventional optimization *** examples verified the feasibility and suitability of this novel approximation for a high contrast interface,and we still could estimate the six parameters across the interface reasonably when the parameters in both media across the interface vary about 50%.

关键词： High-contrast interface reflection coefficient amplitude variation with angle multiparameter estimation artificial neural network inversion

Stress dependence of elastic wave dispersion and attenuation in fluid-saturated porous layered media

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Science China Earth Sciences 2023年第11期66卷 2622-2634页

作者： Fubin CHEN zhaoyun zong Xingyao YIN Alexey STOVAS National Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao 266580China Laoshan Laboratory Qingdao 266580China Centre for Exploration Geophysics Curtin UniversityGPO Box U1987PerthWA 6845Australia Department of Geoscience and Petroleum Norwegian University of Science and Technology(NTNU)Trondheim 7031Norway

The fluid-saturated porous layered(FSPL)media widely exist in the Earth's subsurface and their overall mechanical properties,microscopic pore structure and wave propagation characteristics are highly relevant to the in-situ ***,the effect of in-situ stress on wave propagation in FSPL media cannot be well explained with the existing *** fill this gap,we propose the dynamic equations for FSPL media under the effect of in-situ stress based on the theories of poroacoustoelasticity and anisotropic *** loss mechanism is considered to account for the stress-dependent wave dispersion and attenuation induced by global wave-induced fluid ***'s elastic anisotropy parameters are used to represent the anisotropy of the skeleton.A plane-wave analysis is implemented on dynamic equations yields the analytic solutions for fast and slow P waves and two S *** results show that the elastic anisotropy parameters significantly determine the stress dependence of wave *** tortuosity and permeability have remarkable effects on fast and slow P-wave velocity curves and the corresponding attenuation peaks but have little effect on S-wave *** difference in velocities of two S waves occurs when the FSPL medium is subjected to horizontal uniaxial stress,and the S wave along the stress direction has a larger velocity,which implies that the additional anisotropy other than that induced by the beddings appears due to horizontal ***,the predicted velocity results have the reasonable agreement with laboratory *** equations and results are relevant to a better understanding of wave propagation in deep strata,which provide some new theoretical insights in the rock physics,hydrocarbon exploration and stress detection in deep-strata shale reservoirs.

关键词： Fluid-saturated porous layered(FSPL)media In-situ stress Theory of poroacoustoelasticity Wave equation Wave dispersion and attenuation

Seismic wave scattering inversion for fluid factor of heterogeneous media

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Science China Earth Sciences 2014年第12期57卷 542-549页

作者： YIN XingYao zong zhaoyun WU GuoChen School of Geosciences China University of Petroleum (Huadong)

Elastic wave inverse scattering theory plays an important role in parameters estimation of heterogeneous *** inverse scattering theory,perturbation theory and stationary phase approximation,we derive the P-wave seismic scattering coefficient equation in terms of fluid factor,shear modulus and density of background homogeneous media and perturbation *** this equation as forward solver,a pre-stack seismic Bayesian inversion method is proposed to estimate the fluid factor of heterogeneous *** this method,Cauchy distribution is utilized to the ratios of fluid factors,shear moduli and densities of perturbation media and background homogeneous media,*** distribution is utilized to the likelihood *** introduction of constraints from initial smooth models enhances the stability of the estimation of model *** test and real data example demonstrate that the proposed method is able to estimate the fluid factor of heterogeneous media from pre-stack seismic data directly and reasonably.

关键词： heterogeneous media fluid factor seismic wave scattering pre-stack seismic inversion

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Seismic reflectivity parameterization with the effect of normal in-situ stress

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Seismic reflectivity parameterization with the effect of nor...

含两项不混合/单项黏性流体孔隙介质分界面上反透射系数特征研究

2020年中国地球科学联合学术年会

作者： Chen Fubin zong zhaoyun China University of Petroleum(East China)

The in-situ stress affects not only the seismic wave velocity of the rock but also the seismic reflection coefficient and transmission coefficient of the solid interface. The present researches mainly focus on the conventional seismic reflection and transmission, which neglect the effect of in-situ stress. Based on the theory of solid acoustoelasticity, we deduce the equation of reflection and transmission coefficient equations under the normal stress, and analyze the variation law of equations along with stress and incident angle.

关键词： Seismic reflectivity parameterization with the effect of normal in-situ stress

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地球物理学报 2019年第7期62卷 2684-2696页

作者：周东勇印兴耀宗兆云中国石油大学(华东)地球科学与技术学院山东青岛266580 海洋国家实验室海洋矿产资源评价与探测技术功能实验室山东青岛266071

弹性孔隙介质分界面上的反透射系数特征,在岩性划分、流体识别、储层边界判识等方面有重要的应用.本文研究上层为含两项不混合黏性流体孔隙介质、下层为含单项黏性流体孔隙介质分界面上的反透射理论.首先根据两种孔隙介质分界面上的能... 详细信息

弹性孔隙介质分界面上的反透射系数特征,在岩性划分、流体识别、储层边界判识等方面有重要的应用.本文研究上层为含两项不混合黏性流体孔隙介质、下层为含单项黏性流体孔隙介质分界面上的反透射理论.首先根据两种孔隙介质分界面上的能量守恒得到边界条件,再将波函数、位移、应力与应变关系代入边界条件,推导出完全连通孔隙情况下,第一类纵波入射到孔隙介质分界面上的反透射系数方程.通过建立砂岩孔隙介质模型,分别分析不同孔隙流体类型、不同含油饱和度及不同入射角情况下,各类波的反透射系数特征.研究表明,第二、三类纵波反透射系数数值比第一类纵波小多个数量级,且两者对入射角的变化不敏感,但对孔隙流体性质、含油饱和度的变化较敏感,而横波反透射系数特征恰好与此相反;第一类纵波反透射系数特征比较复杂,入射角、孔隙流体的性质及含油饱和度的变化都对其产生影响.不同孔隙流体弹性物性的差异、孔隙介质中含油饱和度的变化及不同入射角引起垂向和切向应力分量的变化都会影响各类波的反透射系数特征,分析这些特征可以为研究储层含油气性提供理论基础.

关键词：饱和流体孔隙介质含两项不混合流体孔隙介质黏性流体反透射系数

基于匹配追踪谱分解的时频域FAVO流体识别方法

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石油学报 2016年第6期37卷 777-786页

作者：李坤印兴耀宗兆云中国石油大学地球科学与技术学院山东青岛266580 海洋国家实验室海洋矿产资源评价与探测技术功能实验室山东青岛266071

基于Morlet小波的快速动态匹配追踪高分辨率谱分解算法,对比研究了短时傅立叶变换、S变换、连续小波变换及匹配追踪Wigner-Ville分布的时频分辨特征。在此基础上,为充分利用叠前地震资料中蕴含的振幅和频率信息,将快速匹配追踪谱分解方... 详细信息

基于Morlet小波的快速动态匹配追踪高分辨率谱分解算法,对比研究了短时傅立叶变换、S变换、连续小波变换及匹配追踪Wigner-Ville分布的时频分辨特征。在此基础上,为充分利用叠前地震资料中蕴含的振幅和频率信息,将快速匹配追踪谱分解方法与体现流体因子的频变AVO(FAVO)反射特征方程相结合,并依靠匹配追踪算法的高时频分辨特性,发展高分辨率时频域FAVO直接反演方法,该方法将常规谱均衡过程构建于目标泛函中,减少了频散属性提取过程的中间环节,避免了在消除"子波叠印"时引入的累计计算误差。模型测试和实际资料处理表明,该频散属性反演方法有助于精细刻画油气藏位置,是一种可靠性较高的储层流体类型检测方法。

关键词：频变AVO反演匹配追踪时频分辨率频变流体因子流体识别

Non-linear inversion of fundamental-mode surface waves

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Non-linear inversion of fundamental-mode surface waves

Nicotinamide reverses liver fibrosis in a thioacetamide induced mouse model

2019年中国地球科学联合学术年会

作者： Hongli Zhao Concettina Nunziata Chengyu Sun zhaoyun zong China University of Petroleum (East China) University of Napoli Federico Ⅱ

1. Introduction Surface waves are composed of finite numbers of modes, including the fundamental mode and the higher modes(also named overtones). The fundamental mode, however, dominates the shallow part of the Earth. In order to obtain the properties of the subsurface, I focus on the fundamental mode of the surface wave and utilize the Frequency-time analysis

关键词： Non-linear inversion of fundamental-mode surface waves

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Nicotinamide reverses liver fibrosis in a thioacetamide indu...