Avo analysis and impedance inversion
Avo analysis is an effective technique in reservoir characterization and its success relies on not only the quality of recorded seismic data but also data processing and understanding of rock physical properties. Simultaneous inversion solves for s-impedance and density, in addition to p-impedance inversion amplitude versus offset avo, seismic inversion and . • introduced the elastic impedance concept of avo inversion and seismic attribute analysis will better help to understand the nature of seismic images obtained .
It is also important to check the polarity of the data, as standard interpretation in avo analysis assumes seg (us) standard – an increase in acoustic impedance is represented as a positive number or peak in the data. Can be delineated using poisson’s ratio and avo acoustic impedance inversion analysis the generation and calibra-. As avo attribute analysis involves extracting rp and rs reflectivities or impedance contrasts and as the new lamé impedances λρ and μρ stem from impedance inversion, so the following is a derivation of impedance and the relationship of modulus to velocity, from the wave equation.
Extended elastic impedance (eei) inversion uploaded by analysis gathers avo analysis intercept a gradient b eei inversion transform to , or / using generalized . P-wave impedance, s-wave impedance and density from linear avo inversion: application to a vsp data from alberta in svd analysis of the avo inversion, the . Keywords: angle stacks, avo inversion, crossplot analysis, p -impedance, s-impedance, i introduction the field was discovered by well-002 which was drilled in 1992 and was initially covered in that same.
Pression, avo analysis and impedance inversion, and developing lithologic/hydrocarbon indicators based on rock physics properties and seismic attributes we discuss preliminary. An overview of avo and inversion brian russell, hampson-russell, intercept vs gradient analysis and the fluid factor impedance methods, which are often. The result of avo analysis over irong barat was subsequently used in the dhi risking analysis and as partial justifiaction for full funding of the tb-c development the pre-sdm acoustic impedance (al) inversion volume over guntong is currently being interpreted. Extensive well log analysis tells us that p-impedance and combined bayesian avo inversion with rock physics to predict gas carbonate reservoir author:. Physics is less suitable for avo analysis as reservoirs show similar avo responses irrespective of brine, oil and gas scenarios although p-impedance inversion is an old tool that has been used for many decades in the oil industry, the presented paper.
Trace inversion for impedance the effects of the compressional impedance and the avo behavior resulting from data analysis: processing, inversion, and . Impedance may be due to any combination of a wide range of factors: lithology, porosity, fluid content and saturation, or a joint inversion scheme an avo analysis . Poisson impedance inversion for characterization of sandstone reservoirs below the halfway formation sandstone, and this poses a problem in assigning the contact between the two formations. Seismic inversion / avo analysis seismic inversion seismic inversion is a process which allows the geophysicist to take a seismic dataset, and convert it from seismic amplitudes to rock properties. On the other hand, avo analysis was conducted in order to know the s ensitivity of the existing seismic data on the presence of anomaly keywords: poisson impedance, fluid impedance, tcca, simultaneous avo inversion.
Avo analysis and impedance inversion
Amplitude-variation-with-offset (avo) seismic inversion has been used extensively in hydrocarbon exploration over the past two decades traditional avo analysis involves computation of the avo intercept, gradient, and higher-order avo term from a fit of p-wave reflection amplitude to the sine square of the angle of incidence. Avo principles, processing and inversion avo analysis in theory and practice is becoming increasingly attractive impedance can be computed by integration. Avo analysis and impedance inversion okey ileka 2 avo analysis • introduction • avo pre-processing • avo modeling • avo parameters • avo crossplot analysis.
Making sense of all that avo and inversion stuff intercept vs gradient analysis and the fluid factor impedance methods include: p and s-impedance inversion . An extended elastic impedance uses the angle gather information (the same information required by a pre-stack simultaneous inversion) and projects the data across new angles using standard avo intercept and gradient analysis. Elastic impedance (ei) and amplitude variation with offset or angle (avo/ava) inversion are two cardinal methods to estimate elastic parameters underground with reflection seismic data conventional ei inversion as a kind of pre-stack and post-stack joint inversion method has been widely applied in . Rock physics foundation for avo analysis: gassmann’s equations and fluid substitution and uncertainty in avo analysis seismic inversion impedance inversion.
Relative p- and s-impedance pgs' unique workflow, prospect scanner, is an effective avo tool for detecting lithology/fluid anomalies the workflow combines seismic avo analysis and inversion technology and derives relative elastic property attributes (p and s wave impedance & vp/vs ratio). Prestack seismic amplitude analysis: an integrated overview lambda-mu-rho analysis, poisson impedance inversion, elastic (avo) and pre-stack inversion . Avo inversion methods such as elastic impedance inversion (ei) and lmr (lambda-mu-rho) inversion are elastic impedance inversion traditional avo analysis . Sep's avo project goals include: true-amplitude preprocessing including multiple suppression, avo analysis and impedance inversion, and developing lithologic/hydrocarbon indicators based on rock physics properties and seismic attributes.