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Journal of China University of Geosciences 2004年第3期15卷 341-348页

作者： ShiWanzhong ChenHonghan ZhangXiming ChenHuichao Faculty of Earth Resources China University of GeosciencesWuhan430074China The Academy of Design＆Research Northwest Bureau of PetroleumSINOPECUrumqi830011China

The origin and distribution of formation overpressure have effect not only on hydrocarbon migration and accumulation, but also on technique of drilling well. The study and prediction of overpressure are very important in basin analysis. At present, overpressure is mostly predicted by stack velocity. The process in calculating inter-velocity from stack velocity is very complex and inevitably leads to errors. Especially, this method is not available in the case that structural compression contribution to overpressure occurred. This paper introduces a new method, impedance inversion, to predict overpressure, and the principle is discussed. This method is used to predict the overpressure in Kuqa depression, Tarim basin and as a result, the absolute errors are less than 0.1, and relative errors are less than 5 % for predicted fluid pressure coefficients to the drill stem test (DST) measurements. It suggests that this method can be widely used to predict overpressure in foreland basins.

关键词： impedance inversion overpressure stack velocity Kuqa depression.

Recursive impedance inversion of ground-penetrating radar data in stochastic media

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Applied Geophysics 2015年第4期12卷 615-625,630页

作者：曾昭发陈雄李静陈玲娜鹿琪刘凤山吉林大学地球探测科学与技术学院长春130026 美国特拉华州立大学应用数学研究中心多佛19901

The travel time and amplitude of ground-penetrating radar （GPR） waves are closely related to medium parameters such as water content, porosity, and dielectric permittivity. However, conventional estimation methods, which are mostly based on wave velocity, are not suitable for real complex media because of limited resolution. impedance inversion uses the reflection coefficient of radar waves to directly calculate GPR impedance and other parameters of subsurface media. We construct a 3D multiscale stochastic medium model and use the mixed Gaussian and exponential autocorrelation function to describe the distribution of parameters in real subsurface media. We introduce an elliptical Gaussian function to describe local random anomalies. The tapering function is also introduced to reduce calculation errors caused by the numerical simulation of discrete grids. We derive the impedance inversion workflow and test the calculation precision in complex media. Finally, we use impedance inversion to process GPR field data in a polluted site in Mongolia. The inversion results were constrained using borehole data and validated by resistivity data.

关键词： Ground-penetrating radar impedance inversion tapering function stochasticmedium

Acoustic impedance inversion of zero-offset VSP data

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Applied Geophysics 2009年第2期6卷 150-158页

作者： Wang Jing Liu Yang Sun Zhe Tian Hong Su Hua Zhao Qianhua Liu Yingyu State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Beijing 102249 China CNPC Key Laboratory of Geophysical Exploration China University of Petroleum Beijing 102249 China Oilfield Technology Department China Oilfield Services Limited Beijing 101149 China

Highly precise acoustic impedance inversion is a key technology for pre-drilling prediction by VSP data. In this paper, based on the facts that VSP data has high resolution, high signal to noise ratio, and the downgoing and upgoing waves can be accurately separated, we propose a method of predicting the impedance below the borehole in front of the bit using VSP data. First, the method of nonlinear iterative inversion is adopted to invert for impedance using the VSP corridor stack. Then, by modifying the damping factor in the iteration and using the preconditioned conjugate gradient method to solve the equations, the stability and convergence of the inversion results can be enhanced. The results of theoretical models and actual data demonstrate that the method is effective for pre-drilling prediction using VSP data.

关键词： zero-offset VSP impedance inversion non-linear iterative inversion damping factor pre-conditioned conjugate gradient method

Broadband Constraint Based Simulated Annealing impedance inversion

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Broadband Constraint Based Simulated Annealing Impedance Inv...

Seismic impedance inversion using l1-norm regularization and gradient descent methods

第二届国际计算科学与工程国际学术研讨会

作者： Guangxuan Chen Yanhui Du Panke Qin Lei Zhang People's Public Security University of China Beijing University of Posts and Telecommunications

In order to enhance the accuracy and improved the resolution of the inversion result in gas hydrate exploration, this paper proposed a new inversion method. By introducing broadband constraint based simulated annealing impedance inversion, the new method allows for a more extensive search for the optimal solution and is more efficient than exhaustive enumeration in solving global optimization problems. Compared to other inversion solutions as constraint sparse spike inversion and model based inversion, the new method not only solved the global optimization problems, but also improved the resolution of the profiles and enhanced the inversion accuracy, which is helpful to the later interpretation.

关键词： Broadband constraint Global optimization impedance inversion Simulated annealing

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Seismic impedance inversion using l1-norm regularization and...

Seismic attributes and integrated prediction of fractured and caved carbonate reservoirs in the Tarim Basin,China

中国科学院地质与地球物理研究所第11届（2011年度）学术年会

作者： Yanfei Wang Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics,Chinese Academy of Sciences,

We consider numerical solution methods for seismic impedance inversion problems in this *** inversion process is *** tackle the ill-posedness of the problem and take the sparsity of the reflectivity function into consideration,an l normregularization model is *** computation,a nonmonotone gradient descent method based on Rayleigh quotient for solving the minimization model is *** simulations and field data applications are performed to verify the feasibility of our methods.

关键词： impedance inversion optimization regularization

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Petroleum Science 2011年第4期8卷 455-461页

作者： Liu Lifeng Sam Zandong Sun Yang Haijun Han Jianfa Gao Hongliang Jing Bing Zhu Xinghui Laboratory for Integration of Geology ＆ Geophysics China University of Petroleum Beijing 102249 China Research Institute of Exploration ＆ Development PetroChina Tarim Oilfield Company Korla 841000 China

The carbonate reservoirs in the Tarim Basin are characterized by anisotropy and strong *** with an integrated analysis of data from seismic,geology,and drilling results,a series of attributes which are suitable for fractured and caved carbonate reservoir prediction is discussed,including amplitude,coherence analysis,spectra decomposition,seismic absorption attenuation analysis and impedance ***,3-D optimization of these attributes is achieved by integration of multivariate discriminant analysis and principle component analysis,where the logging data are taken as training *** the optimized results,the spatial distribution and configuration features of the caved reservoirs can be characterized in *** technique not only improves the understanding of the spatial distribution of current reservoirs but also provides a significant basis for the discovery and production of carbonate reservoirs in the Tarim Basin.

关键词： Coherence analysis spectra decomposition seismic absorption and attenuation impedance inversion seismic attribute optimization

Application of constrained sparse spike inversion in reservoir predication:a case study of Oriente Basin in South America

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Global Geology 2011年第2期14卷 87-93页

作者： WANG Qing LU Zhanguo Key Laboratory of Geo-detection of Ministry of Education China University of Geosciences Beijing 100083 China Beijing Orangelamp Navigation Technology Development Co. Ltd Beijing 100085 China

In the conditions of low Signal-to-Noise Ratio(SNR) of seismic data and a small quality of log information,the consequences of seismic interpretation through the impedance inversion of seismic data could be more precise. Constrained sparse spike inversion(CSSI) has advantage in oil and gas reservoir predication because it does not rely on the original model. By analyzing the specific algorithm of CSSI,the accuracy of inversion is controlled. Oriente Basin in South America has the low amplitude in geological structure and complex lithologic trap. The well predication is obtained by the application of CSSI.

关键词： CSSI reservoir predication control parameters lower frequency model impedance inversion