Seismic preprocessing and amplitude cross‐calibration for a time‐lapse amplitude study on seismic data from the Oseberg reservoir

Stucchi, E.; Mazzotti, Alfredo; Ciuffi, Simonetta

doi:10.1111/j.1365-2478.2004.00471.x

Cited by 12 publications

(5 citation statements)

References 25 publications

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“…Elastic indicators such as amplitude and phase versus offset (AVO and PVO) or others are sometimes used in reservoir and time‐lapse applications (Mazzotti ; Avseth et al . ; Stucchi, Mazzotti, and Ciuffi ). However, elastic effects are not taken into account in this paper, and only simplified zero‐offset modelling was performed to investigate the change in the interference pattern.…”

Section: Seismic Modellingmentioning

confidence: 98%

“…In order to facilitate the verification of the field data and to understand the changes of wavelet phase resulting from injected CO 2 , a series of seismic forward modelling tests was performed. Elastic indicators such as amplitude and phase versus offset (AVO and PVO) or others are sometimes used in reservoir and time-lapse applications (Mazzotti 1991;Avseth et al 2001;Stucchi, Mazzotti, and Ciuffi 2005). However, elastic effects are not taken into account in this paper, and only simplified zero-offset modelling was performed to investigate the change in the interference pattern.…”

Section: S E I S M I C M O D E L L I N Gmentioning

confidence: 99%

See 1 more Smart Citation

Feasibility of utilizing wavelet phase to map the CO₂ plume at the Ketzin pilot site, Germany

Huang

Juhlin

Han³

et al. 2016

Geophysical Prospecting

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Spectral decomposition is a powerful tool that can provide geological details dependent upon discrete frequencies. Complex spectral decomposition using inversion strategies differs from conventional spectral decomposition methods in that it produces not only frequency information but also wavelet phase information. This method was applied to a time‐lapse three‐dimensional seismic dataset in order to test the feasibility of using wavelet phase changes to detect and map injected carbon dioxide within the reservoir at the Ketzin carbon dioxide storage site, Germany. Simplified zero‐offset forward modelling was used to help verify the effectiveness of this technique and to better understand the wavelet phase response from the highly heterogeneous storage reservoir and carbon dioxide plume. Ambient noise and signal‐to‐noise ratios were calculated from the raw data to determine the extracted wavelet phase. Strong noise caused by rainfall and the assumed spatial distribution of sandstone channels in the reservoir could be correlated with phase anomalies. Qualitative and quantitative results indicate that the wavelet phase extracted by the complex spectral decomposition technique has great potential as a practical and feasible tool for carbon dioxide detection at the Ketzin pilot site.

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Section: Seismic Modellingmentioning

confidence: 98%

Section: S E I S M I C M O D E L L I N Gmentioning

confidence: 99%

Feasibility of utilizing wavelet phase to map the CO₂ plume at the Ketzin pilot site, Germany

Huang

Juhlin

Han³

et al. 2016

Geophysical Prospecting

View full text Add to dashboard Cite

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“…different prediction distance for predictive deconvolution, e.g. Stucchi, Mazzotti and Ciuffi 2005). Alternatively, Calvert and Wills (2003) proposed an original approach to remove these multiples.…”

Section: O N C L U S I O N Smentioning

confidence: 99%

Repeatability enhancement in deep‐water permanent seismic installations: a dynamic correction for seawater velocity variations

Bertrand

MacBeth

2005

Geophysical Prospecting

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A B S T R A C TWith the increasing use of permanently installed seismic installations, many of the issues in time-lapse seismic caused by the lack of repeatability can be reduced. However, a number of parameters still influence the degree of reliability of 4D seismic data. In this paper, the specific impact of seawater velocity variations on time-lapse repeatability is investigated in a synthetic study. A zero-lag time-lapse seabed experiment with no change in the subsurface but with velocity changes in the water column is simulated. The velocity model in the water column is constant for the baseline survey while the model for the repeat survey is heterogeneous, designed from sea salinity and temperature measurements in the West of Shetlands. The difference section shows up to 80% of residual amplitude, which highlights the poor repeatability. A new dynamic correction which removes the effect of seawater velocity variations specifically for permanent installations is developed. When applied to the synthetic data, it reduces the difference residual amplitude to about 3%. This technique shows substantial improvement in repeatability beyond conventional time-lapse cross-equalization. I N T R O D U C T I O NOne of the main issues encountered during 4D seismic experiments is the degree of repeatability between successive surveys. It often determines the degree of confidence in the interpretation of the time-lapse signature. Metrics have been developed to quantify that degree of confidence. The most used are the NRMS (which measures the normalized root mean square difference residual amplitude) and the predictability (which measures the correlation between two traces). Their equations are given in Appendix A. Over the past years, factors affecting repeatability have been studied extensively and solutions or guidelines have been laid out in order to minimize their effects. From the acquisition point of view, dedicated 4D surveys have proved to be more repeatable than the use of legacy data sets. Swanston et al. (2003) compared the repeatabilities obtained for legacy and 4D dedicated sur- * Now at: veys. In their examples, dedicated 4D experiments tended to achieve an NRMS value of around 30% to 40% while it is more likely to exceed 60% for 4D experiments using data not purposely acquired. Such experiments include the Alba Field (towed streamers and seabed receivers) where the NRMS is 89% (Hanson et al. 2003). Similarly, dedicated 4D processing helps to reduce the discrepancies between data sets. Smith et al. (2001) showed that careful 4D reprocessing reduced the difference residual amplitude from 74.6% to 41.3%. New 4D specific processing techniques have also been developed to remove non-production-related difference signals. Cross-equalization (Ross, Cunningham and Weber 1996), warping (Rickett and Lumley 2001), singular-value decomposition (Reid et al. 2005) and geostatistics (Lecerf and Coleou 2002) are some of the methods that are now used to improve the quality of the 4D signature. However, some parameters, often ...

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“…The challenge of time-lapse data processing is to reveal changes in the reservoir. Crossequalization is a popular technique for this task (Ross, et al, 1996;Schmitt, 1999;Rickett and Lumley, 2001;Stucchi et al, 2005). These approaches to amplitude balancing are to scale time-lapse datasets using the R.M.S.…”

Section: Introductionmentioning

confidence: 99%

Southwest Regional Partnership on Carbon Sequestration Phase II

Rutledge¹

2011

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The Southwest Regional Partnership (SWP) on Carbon Sequestration designed and deployed a medium-scale field pilot test of geologic carbon dioxide (CO 2) sequestration in the Aneth oil field. Greater Aneth oil field, Utah's largest oil producer, was discovered in 1956 and has produced over 455 million barrels of oil (72 million m 3). Located in the Paradox Basin of southeastern Utah, Greater Aneth is a stratigraphic trap producing from the Pennsylvanian Paradox Formation. Because it represents an archetype oil field of the western U.S., Greater Aneth was selected as one of three geologic pilots to demonstrate combined enhanced oil recovery (EOR) and CO 2 sequestration under the auspices of the SWP on Carbon Sequestration, sponsored by the U.S. Department of Energy. The pilot demonstration focuced on the western portion of the Aneth Unit as this area of the field was converted from waterflood production to CO 2 EOR starting in late 2007. The Aneth Unit is in the northwestern part of the field and has produced 149 million barrels (24 million m 3) of the estimated 450 million barrels (71.5 million m 3) of the original oil in place-a 33% recovery rate. The large amount of remaining oil makes the Aneth Unit ideal to demonstrate both CO 2 storage capacity and EOR by CO 2 flooding. This report summarizes the geologic characterization research, the various field monitoring tests, and the development of a geologic model and numerical simulations conducted for the Aneth demonstration project. The Utah Geological Survey (UGS), with contributions from other Partners, evaluated how the surface and subsurface geology of the Aneth Unit demonstration site will affect sequestration operations and engineering strategies. The UGS' research for the project are summarized in Chapters 1 through 7, and includes (1) mapping the surface geology including stratigraphy, faulting, fractures, and deformation bands, (2) describing the local Jurassic and Cretaceous stratigraphy, (3) mapping the Desert Creek zone reservoir, Gothic seal, and overlying aquifers, (4) characterizing the depositional environments and diagenetic events that produced significant reservoir heterogeneity, (5) describing the geochemical, petrographic, and geomechanical properties of the seal to determine the CO 2 or hydrocarbon column it could support, and (6) evaluating the production history to compare primary production from vertical and horizontal wells, and the effects of waterflood and wateralternating-gas flood programs. The field monitoring demonstrations were conducted by various Partners including New

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Seismic preprocessing and amplitude cross‐calibration for a time‐lapse amplitude study on seismic data from the Oseberg reservoir

Cited by 12 publications

References 25 publications

Feasibility of utilizing wavelet phase to map the CO₂ plume at the Ketzin pilot site, Germany

Feasibility of utilizing wavelet phase to map the CO₂ plume at the Ketzin pilot site, Germany

Repeatability enhancement in deep‐water permanent seismic installations: a dynamic correction for seawater velocity variations

Southwest Regional Partnership on Carbon Sequestration Phase II

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Seismic preprocessing and amplitude cross‐calibration for a time‐lapse amplitude study on seismic data from the Oseberg reservoir

Cited by 12 publications

References 25 publications

Feasibility of utilizing wavelet phase to map the CO2 plume at the Ketzin pilot site, Germany

Feasibility of utilizing wavelet phase to map the CO2 plume at the Ketzin pilot site, Germany

Repeatability enhancement in deep‐water permanent seismic installations: a dynamic correction for seawater velocity variations

Southwest Regional Partnership on Carbon Sequestration Phase II

Contact Info

Product

Resources

About

Feasibility of utilizing wavelet phase to map the CO₂ plume at the Ketzin pilot site, Germany

Feasibility of utilizing wavelet phase to map the CO₂ plume at the Ketzin pilot site, Germany