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Geological influences on acoustic impedance

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Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0146
... 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...
Proceedings Papers

Paper presented at the 2009 SEG Annual Meeting, October 25–30, 2009
Paper Number: SEG-2009-2496
... 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...
Proceedings Papers

Paper presented at the European 3-D Reservoir Modelling Conference, April 16–17, 1996
Paper Number: SPE-35485-MS
... 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...
Proceedings Papers

Paper presented at the SPE Russian Petroleum Technology Conference, October 26–28, 2015
Paper Number: SPE-176613-MS
... 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...
Proceedings Papers

Paper presented at the 2000 SEG Annual Meeting, August 6–11, 2000
Paper Number: SEG-2000-0689
... 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...
Proceedings Papers

Paper presented at the International Petroleum Technology Conference, March 1–3, 2023
Paper Number: IPTC-23024-EA
... 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...
Proceedings Papers

Paper presented at the SPE Annual Caspian Technical Conference & Exhibition, November 1–3, 2016
Paper Number: SPE-182578-MS
... 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...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2013
Paper Number: OTC-23978-MS
... 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...
Proceedings Papers

Paper presented at the International Petroleum Technology Conference, February 21–23, 2022
Paper Number: IPTC-21938-EA
..., 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...
Proceedings Papers

Paper presented at the 1982 SEG Annual Meeting, October 17–21, 1982
Paper Number: SEG-1982-0199
... 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...
Proceedings Papers

Paper presented at the 1998 SEG Annual Meeting, September 13–18, 1998
Paper Number: SEG-1998-0385
.... 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...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594237
... 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...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31102-MS
... 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...
Proceedings Papers

Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 28–September 1, 2022
Paper Number: SEG-2022-3751010
... 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...
Proceedings Papers

Paper presented at the 2000 SEG Annual Meeting, August 6–11, 2000
Paper Number: SEG-2000-1580
... 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...
Proceedings Papers

Paper presented at the 1999 SEG Annual Meeting, October 31–November 5, 1999
Paper Number: SEG-1999-0993
... 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...
Proceedings Papers

Paper presented at the OMC Med Energy Conference and Exhibition, September 28–30, 2021
Paper Number: OMC-2021-070
... 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...
Proceedings Papers

Paper presented at the SPE Reservoir Characterisation and Simulation Conference and Exhibition, September 17–19, 2019
Paper Number: SPE-196618-MS
... 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...
Proceedings Papers

Paper presented at the SPE Latin American and Caribbean Petroleum Engineering Conference, March 25–28, 2001
Paper Number: SPE-69485-MS
... 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...
Proceedings Papers

Paper presented at the 1997 SEG Annual Meeting, November 2–7, 1997
Paper Number: SEG-1997-0606
... 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...

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