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Keywords: impedance
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Proceedings Papers

Paper presented at the SPE Europec featured at 81st EAGE Conference and Exhibition, June 3–6, 2019
Paper Number: SPE-195549-MS
... attributes are generated by running a petro-elastic model (PEM) with reservoir simulation data, at the simulation scale. Then, instead of averaging the simulation layers, we propose to resample the simulation grid to a seismic grid and filter the seismic impedances to the seismic frequency. Lastly, we...
Proceedings Papers

Paper presented at the EAGE Annual Conference & Exhibition incorporating SPE Europec, June 10–13, 2013
Paper Number: SPE-164857-MS
... functions to find better models that match the data. We use a qualitative measure of the change of acoustic impedance in both the model and observed data domains to determine how much change takes places during production. Then we compare regions of change as a measure of similarity. With production data...
Proceedings Papers

Paper presented at the EAGE Annual Conference & Exhibition incorporating SPE Europec, June 10–13, 2013
Paper Number: SPE-164852-MS
... parameters and analysing uncertainties in parameter estimates. In this study we apply history matching to the models on the Schiehallion field. We compare the attributes of acoustic impedance derived from coloured inversion products to predicted acoustic impedance from a petro-elastic model. We call this a...
Proceedings Papers

Paper presented at the EAGE Annual Conference & Exhibition incorporating SPE Europec, June 10–13, 2013
Paper Number: SPE-164884-MS
... In a GOM case study, we collected data of gamma ray (GR) and calculated acoustic impedance (AI) from density and sonic curves. We plotted AI against GR, and colored the scatter data points with shale volume (VSH) ( Fig.2 ). Our data show a loose relationship between AI and GR, with lower GR...
Proceedings Papers

Paper presented at the SPE Europec/EAGE Annual Conference, June 4–7, 2012
Paper Number: SPE-154509-MS
... impedances along them are calculated separately. The total impedance change is the sum of the individual impedance changes. The median heterogeneity (small scale) is believed to be the main reason for the non-Fickian transport of tracers in porous media ( Cortis and Berkowitz, 2004 ; Levy and...
Proceedings Papers

Paper presented at the SPE Europec/EAGE Annual Conference, June 4–7, 2012
Paper Number: SPE-154503-MS
... ‘coloured inversion’ (Lancaster and Whitcombe, 2000) , and referred to as maps of pseudo-impedance ( Stephen, 2006) . To match the observed data, we calculate two types of predictions. The first type consists of synthetic impedance maps calculated through a petro-elastic model from simulator output as...
Proceedings Papers

Paper presented at the SPE Europec/EAGE Annual Conference, June 4–7, 2012
Paper Number: SPE-154870-MS
... of chalk reservoirs of high calcite content has mostly been focused around prediction of porosity, due to the strong correlation between acoustic impedance and porosity (e.g. Walls et al. 1998 ; Anderson, 1999 ; Jacobsen et al. 1999) . Lithology prediction from seismic is similarly well...
Proceedings Papers

Paper presented at the SPE EUROPEC/EAGE Annual Conference and Exhibition, May 23–26, 2011
Paper Number: SPE-142946-MS
... H M + 8 μ H M K H M + 2 μ H M ) , Abstract Time-Lapse seismic attributes has been showed as a promising tool to be used in the history matching process. The most common seismic attribute used to integrate these data is P-impedance. The procedure usually...
Proceedings Papers

Paper presented at the SPE EUROPEC/EAGE Annual Conference and Exhibition, May 23–26, 2011
Paper Number: SPE-143123-MS
... above can be simplified when accounting for this particular cross-covariance model. We show two examples to support the interest of a co-simulation algorithm. First, we simulate a porosity field conditionally to impedances. In this case, realization y 1 is known: it consists of the 50×45...
Proceedings Papers

Paper presented at the SPE EUROPEC/EAGE Annual Conference and Exhibition, June 14–17, 2010
Paper Number: SPE-130303-MS
... such optimization methodology can reduce significantly the differences between observed P, S-impedances data and modelled ones from the optimized RPM compared to the base RPM. The results of forward modelling in elastic domain match better the 3D inverted seismic data with around 15% reduction of...
Proceedings Papers

Paper presented at the SPE EUROPEC/EAGE Annual Conference and Exhibition, June 14–17, 2010
Paper Number: SPE-131310-MS
... impedances are derived from seismic inversion. Second, these data are incorporated into a matching process to identify reservoir models leading to acoustic responses close to the reference acoustic data. The parameterization of the facies and petrophysical properties populating the reservoir models is based...
Proceedings Papers

Paper presented at the SPE EUROPEC/EAGE Annual Conference and Exhibition, June 14–17, 2010
Paper Number: SPE-131538-MS
... identified for observed data we have a change of impedance for modeled data but not exactly the same as observed data. The differences should be removed by history matching. Figure 4 Qualitative analysis of observed 4D data by comparing observe data (a) and synthetic data (b) from base model. The...
Proceedings Papers

Paper presented at the Europec/EAGE Conference and Exhibition, June 9–12, 2008
Paper Number: SPE-113557-MS
... reservoir simulation impedance best model successively case study Upstream Oil & Gas fault transmissibility seismic history misfit society of petroleum engineers inclusive run History segment 4 transmissibility multiplier SPE 113557 Updating Fault Transmissibilies in Simulations by...
Proceedings Papers

Paper presented at the EUROPEC/EAGE Conference and Exhibition, June 11–14, 2007
Paper Number: SPE-107147-MS
... is compared to equivalent observed properties. Conventionally, observed data consists of production and injection data from wells while time-lapse seismic data may include acoustic or elastic impedance attributes or perhaps full predictions of seismic. Following an evaluation of the misfit to history...
Proceedings Papers

Paper presented at the SPE Europec/EAGE Annual Conference and Exhibition, June 12–15, 2006
Paper Number: SPE-100233-MS
... modelling, the simulated elastic parameters (impedances) can be predicted before and during production. This can then enable the changes in rock and fluid properties to be compared with the changes inferred from the seismic surveys, thus providing additional information for computer-aided history matching...
Proceedings Papers

Paper presented at the SPE Europec/EAGE Annual Conference and Exhibition, June 12–15, 2006
Paper Number: SPE-100334-MS
... formation is characterised by four parameters: filtration and formation damage coefficients, critical porosity fraction and filter cake permeability.[4–6] Nevertheless, just three constants can be extracted from well injectivity decline curve: the impedance slope during deep bed filtration, the transition...
Proceedings Papers

Paper presented at the SPE Europec/EAGE Annual Conference and Exhibition, June 12–15, 2006
Paper Number: SPE-100295-MS
... converted to predictions of seismic impedance attributes using a petro-elastic transform and suitable re-scaling. The resulting misfit between the model and observed data is combined with an equivalent measure for well data and these are used to constrain simulations by iteratively updating the model...
Proceedings Papers

Paper presented at the SPE Europec/EAGE Annual Conference, June 13–16, 2005
Paper Number: SPE-94173-MS
... predictions of seismic impedance attributes and compared to observed data by calculation of a misfit. With a similar approach applied to dynamic well data, the total misfit is used to update model probabilities in a Bayesian framework. These are then used to guide the re-sampling of the parameter space...
Proceedings Papers

Paper presented at the SPE European Petroleum Conference, October 24–25, 2000
Paper Number: SPE-65131-MS
... parameters are inverted to allow the numerical recovery of seismic acquisitions. But these inversion processes are made separately and are poorly constrained. The idea of this original work is to simultaneous match both the permeability and the acoustical impedance of the reservoir for an enhancement of the...
Proceedings Papers

Paper presented at the SPE European Petroleum Conference, October 24–25, 2000
Paper Number: SPE-65132-MS
... paleogeographic maps, correlation panels, and stratigraphic gridding and seismic impedance results when available. This technique makes full use of the sedimentological interpretation at the well and, when necessary, captures fine scale heterogeneities observed at the well. We then present a methodology for...

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