In velocity inversion, the result is a map of wavespeed that can be used to determine lithology. Reservoir characterization using avo and seismic inversion. Seismic exploration is divided into refraction and reflection. Ebook introduction to seismic inversion methods as pdf. Figure from seismic inversion methods and some of their. Seismic inversion q compensated acoustic impedance inversion of attenuated seismic data. An overview of the current techniques used in the inversion of seismic data is provided. Adequate data preconditioning is a prerequisite for quantitative interpretation of the end results. Stochastic vs deterministic pre stack inversion methods. Several methods can be used to model the reflection coefficient versus angle. This recorded seismic data can be used to image the earths subsurface. Comparison of post stack seismic inversion methods.
Pdf on jan 1, 1999, brian russell and others published comparison of poststack seismic inversion methods find, read and cite all the. Ritesh kumar sharma, arcis seismic solutions, calgary. A broad meaning of seismic inversion commonly referred to as elastic inversion, is the grand scheme of estimating elastic parameters directly from observed data. Providing an uptodate overview of the most popular global optimization methods used in interpreting geophysical observations, this new edition includes a detailed description of the theoretical. Every point on the wave front is a source of a new wave that travels out of it in the form of spherical shells. These methods minimize an objective function, which is usually a measure. Modelbased inversion produces a blocky output that contains more geological detail than bandlimited inversion. A constrained global inversion method using an overparameterized. Pdf fast seismic inversion methods using ant colony. This chapter introduces a wavelet construction method based on the statistical characteristics of the power spectrum, and two inversion methods for a constant. Stochastic vs deterministic prestack inversion methods cgg. Generally, the stochastic inversion methods use broadband starting models drawn from welllogbased a priori distribution of the model space and apply a globalsearch method for seismic data fitting torresverdin et al1999, francis 2006a, 2006b, srivastava and sen 2010.
In fact all seismic method pre or post stack, deterministic or sthocastic are recursive. The seismic signature is replaced by a blocky response corresponding to the seismic impedance layering. Flow chart of inversion methods used in this study. Seismic wavelet estimation seismic inversion wiley. Pdf on jan 1, 1999, brian russell and others published comparison of poststack seismic inversion methods find, read and cite all the research you need on researchgate. Numerical and fielddata experiments xintao chai, genyang tang, fangfang wang, hanming gu, and xinqiang. Different methods of seismic inversion, including deterministic and stochastic.
We present a seismic inversion method driven by a petro elastic model, providing finescale geological models, in depth, fully compatible with prestack seismic. For both deterministic and stochastic inversion, the seismic amplitudes control. Figure 1 shows flowchart of seismic inversion methods. Basic principles of the seismic method in this chapter we introduce the basic notion of seismic waves. Near and far stacks, intercept vs gradient analysis and the fluid factor. Conventional seismic trace inversion method is based on the assumption of pwave striking interface normally.
Sparsespike inversion introduction to seismic inversion. Seismic reservoir characterization for carbonate environments is often. Fast seismic inversion methods using ant colony optimization algorithm. The geosi method that i will discuss today combines both a gaussian pdf and. The journal of the acoustical society of america 6. This can make it confusing for the nonspecialist to understand the various flavors of seismic inversion and choose the most appropriate tool for a particular interpretation task. Seismic inversion is a complex topic with many different methods. These techniques provide detailed information about subsurface. In the earth, seismic waves can propagate as longitudinal p or as shear s waves.
They address the bandlimited nature of deterministic inversion methods and integrate well data and seismic data at a fine scale within a stratigraphic geomodel framework. This inversion, called seismic inversion for reservoir characterization, reads between the lines, or between reflecting interfaces, to produce detailed models of rock properties. Also, by combining seismic inversion with geostatistics leads to. The three application examples shown herein use the gsi, but the main concepts of the proposed approach are easily extrapolated to similar geostatistical inversion methods. In the same way most of the seismic inversion methods are modeldriven because they use an initial solution and try to fit the real solution from the initial. A list of presentations at the 1994 seg postconvention workshop on comparison of seismic inversion methods on a single real data set for which papers in this volume were written. Seismic stratigraphic and quantitative interpretation of.
The past track record has demonstrated the benefits of the. Seismic inversion methods and some of their constraints article pdf available in first break 2210 june 2004 with 6,770 reads how we measure reads. Comparison of seismic inversion methods on a single real. Introduction to seismic inversion methods course notes series.
Seismic inversion aims to reconstruct a quantitative model of the earth subsurface, by solving an inverse problem based on seismic measurements. Basic principles of the seismic method tu delft ocw. Combining seismic inversion and geostatistics to predict reservoir. This can make it confusing for the nonspecialist to understand the various flavors of seismic inversion and choose the most appropriate. Methods geologic setting seismic stratigraphic interpretation quantitative seismic interpretation poststack acoustic impedance inversion 3d porosity estimation via probabilistic neural network. Seismic inversion provides insight to porosity variations away from limited well control. However, it should be realised that the inversion procedure is not a unique process, i.
Bandlimited inversion is a robust method that produces a smooth and continuous output. An overview of techniques used in the inversion of seismic data is provided. Reservoir characterization using avo and seismic inversion techniques abhinav kumar dubey, iit kharagpur summary reservoir characterization is one of the most important components of seismic. Pdf seismic inversion methods and some of their constraints. Measurement of seismicwave travel time is one of the most common geophysical method. Seismic techniques are commonly used to determine site geology, stratigraphy, and rock quality. In the same way most of the seismic inversion methods are model. Stochastic and deterministic seismic inversion methods for thinbed. Some of the advantages of poststack inversion methods are mentioned below. Seismic inversion methods and some of their constraints. Band limited and colour inversion are not recursive. Integrated studies are essential to hydrocarbon development projects e. Earthworks seismic inversion plugin for decisionspace. Pdf comparison of poststack seismic inversion methods.
We implemented two inversion methodsstochastic and deterministicon the same seismic data in order to develop a highresolution map of a target zone. Seismic rays are used instead of the wave front to describe the wave propagation. The inversion methods are implemented on the poststack seismic data. The seismic inversion method that is presented in this work is classified as a deterministic inversion method russell, 1988. Porosity prediction from seismic inversion, lavrans field. Stochastic and deterministic seismic inversion methods for. Thus, seismic inversion can be a valuable tool for reservoir characterization prior to field development. In statistical methods for seismic inversion, the solution is expressed as a probability density function in the model parameters space. A paper by hampson and russell 1985 outlined a modification of maximumlikelihood deconvolution method which allowed the method to be more easily applied to real seismic data. Both stochastic and deterministic inversion methods utilize the following convolution model. Historically, the most popular seismic inversion technique used to estimate acoustic impedance is recursive inversion. Strategies for integrating uncertainty in iterative. Introduction to seismic inversion methods top results of your surfing introduction to seismic inversion methods start download portable document format pdf and ebooks electronic books free online rating news 20162017 is books that can provide inspiration, insight, knowledge to the reader.
Introduction to seismic method linkedin slideshare. Care should be taken when interpreting the inversion results. Simultaneous inversion of shallow seismic data for imaging. A twostage markov chain monte carlo method for seismic. Quantitative analysis of dissimilarities between different methods of. Introduction to seismic inversion methods top results of your surfing introduction to seismic inversion methods start download portable document format pdf and ebooks electronic books free. For all inversion methods, the prior model is constructed by interpolating filtered logs, and controls low frequencies. There is a bright future for the use of geophysics but it requires that inversion be applied with care and. Results from a typical poststack or prestack seismic inversion are bandlimited primarily due to missing low. The interest in seismic inversion techniques has been growing steadily over the last couple of years.
1448 245 1253 1043 883 1151 320 256 523 1579 1547 825 1380 99 730 1285 570 409 1097 1403 352 1057 1393 1632 702 607 794 823 611 1022 1382 1268 34 1362 139 1393 468 72 614 1263 477