... inversion, and to determine whether the higher resolution data or more accurate seismic velocity can be obtained. To address these issues, based on 3D thin-bed geologic model and post-stack linear programming inversion method (LP), we study the influence of expanding high or low-frequency effective...

... Summary Thin-bed reservoirs are one of the major research topics in lithologic seismic prospecting, and one of the main difficulties as well. Seismic impedance inversion is generally considered a direct geologic interpretation approach. Although the inversion technique has evolved from post...

... with the geological model of one of the productive Lower Tarbert sands. However, manual interpretation ofthe low acoustic impedance event on the interpretation system proved to be difficult especially at the edges which in fact were the areas of greatest interest. Instead acoustic impedance maps were extracted using...

... in an isotropic medium. "The model of overlap," describes the case of a gradual change in the acoustic properties of the section. Both models have been given a change of acoustic impedance along the wedge; this technique allows us to trace the influence of changes in the geological properties to the spectral...

... on contrasts in acoustic impedance--density times velocity. Conventional multi-channel seismic data also records oblique reflections, which have been influenced by concurrent mode conversion from compressional to shear waves. Thus the amplitude variation with offset (AvO) exhibited by seismic reflection events...

... model impedance international petroleum technology conference rock physic application elastic impedance Introduction Rock physics is one of the key tools that link geological features and geophysical observations ( Pradhan, Avseth, & Mukerji, 2023 ). A proper understanding...

... of inversion use borehole data to build geologically meaningful models. Since the target parameters of the inversion are acoustic impedance, shear impedance, density, then the fundamental significant well logging results are the acoustic, density and interval travel time of P and S waves. Log responses...

... generated by shallow gas and positive impedance contrasts generated by hard soils/sediments give similar responses. The ability to derive acoustic impedance from the SBP data allows geologists, geophysicists , and engineers to assess near-surface geologic conditions and characters of the soils/sediments...

..., careful pre-stack data conditioning steps were taken to create stable seismic event across the offset. 6 angle stacks were used as input for the simultaneous seismic inversion with the acoustic impedance and Vp/Vs ratio as the deliverables. The main geological factor that controls the reservoir...

... but also on characteristics of noise, it is important to determine how these factors influence the recovery of the acoustic impedance. It is generally believed that the difference of the band-limited acoustic impedance and the perfect acoustic impedance decreases as the bandwidth of a seismic source...

.... Influences on amplitudes For illustrative purposes correction factors are developed for geometrical divergence, transmission, and impedance in the acoustic case. VSP receivers are typically sensitive to the particle velocity. For purposes of discussion it is assumed that the three component VSP observations...

... to influence drilling decisions (Dac & Sanders 2014). Once corridor stacks are generated, they can be inverted for acoustic impedance and thus, obtaining velocity profiles ahead of the well TD. These predicted velocities can be used to predict the depth of target reservoirs as well as to spot high pressure...

... from the Hilbert transform and inversion modeling results (acoustic impedance and modeling uncertainty) were integrated to define better geological horizons and discontinuities. The results show the integrated geophysical subsurface models can support seismic interpretation and improve shallow marine...

... analysis, we selected attributes that highlight the main geologic characteristics found in the reservoirs. They can be divided into two categories, stratigraphic (acoustic impedance, instantaneous phase, and hybrid spectral decomposition) and structural attributes (coherence and curvature). We used a model...

... ABSTRACT Seismic inversion for acoustic impedance has been widely practiced in the industry. By "inversion", we mean converting seismic reflection amplitudes into impedance profiles. This involves removing the bandpass filter ("wavelet") imposed by seismic acquisition and processing. Well...

... 0ž phase, but a ramped acoustic impedance appears -90ž phase when convolved with the same wavelet (Figure 5). Examining phase independent Figure 5. Zero phase wavelet convolved with step and ramp acoustic impedance models. information such as stacking velocities may help to determine if geologic...

... the inversion process and calculate the acoustic impedance. When well data are not available, acoustic impedance inversion cannot be performed properly. In one of the mentioned cases, a pseudo-acoustic impedance volume has been then computed from partial angle stacks by means of a novel inversion-based custom...

... an additional channel distribution. The relationship of high porosity with low acoustic impedance appeared mostly in the channel facies which reflects good reservoir quality grainstone channels. Outside these channels, the rock is heavily mud filled by peritidal carbonates and characterized by a high acoustic...

... reservoir characterization geostatistical inversion spe 69485 geostatistical spe 69485 acoustic impedance variogram artificial intelligence thin-bed fluvial reservoir sand packet simulation vertical discrimination porosity resolution geological modeling seismic data Introduction...

... impedance located in clinoforms of Torton age. Only one zone of abnormal seismic attenuation corresponding to the east acoustic impedance anomaly is revealed using AVD (Attenuation and Velocity Dispersion) method. This anomaly is confirmed by the productive well, discovered oil-bearing layer of sands...