A New Technique for Pressure - Saturation Separation from Time-Lapse Seismic - Schiehallion Case Study

Floricich, Mariano; MacBeth, Colin; Stammeijer, Jan; Staples, Rob; Evans, Andrew; Dijksman, C.

doi:10.3997/2214-4609.201402389

Cited by 10 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The first step is to select a seismic attribute map that is sensitive to the reservoir changes. Examples of the range of possible seismic attributes suited for this purpose are given by Floricich et al (2006); however, it is known that the choice is field dependent. After selection, a discrete grid of points is then overlain on top of the attribute map, and across the fault segment of interest (figure 1).…”

Section: Fault Transmissibility Analysis Using 4d Seismic Datamentioning

confidence: 99%

A method to update fault transmissibility multipliers in the flow simulation model directly from 4D seismic

Benguigui

Yin

MacBeth

2014

Journal of Geophysics and Engineering

View full text Add to dashboard Cite

We propose a new approach to update fault seal estimates in fluid flow simulation models by direct use of 4D seismic amplitudes calibrated by a well geological constraint. The method is suited to compartmentalized reservoirs and based on metrics created from differences in the 4D seismic signature on either side of major faults. The effectiveness of the approach is demonstrated by application to data from the fault controlled Heidrun field in the Norwegian Sea. The results of this application appear favourable and show that our method can detect variations of fault permeability along the major controlling faults in the field. Updates of the field simulation model with the 4D seismic-derived transmissibilities are observed to decrease the mismatch between the predicted and historical field production data in the majority of wells in our sector of interest.

show abstract

Section: Fault Transmissibility Analysis Using 4d Seismic Datamentioning

confidence: 99%

A method to update fault transmissibility multipliers in the flow simulation model directly from 4D seismic

Benguigui

Yin

MacBeth

2014

Journal of Geophysics and Engineering

View full text Add to dashboard Cite

show abstract

“…Production started in 1998, and during the course of production, lack of support from injectors and a weak aquifer influx has led to a strong pressure decrease and a drop below the bubble point with the consequent liberation of free gas from the solution. The field is non-compacting (Floricich et al 2006) and segregated by a series of east-west trending normal faults, which divide the reservoir into five distinct segments with limited or no lateral communication. This character of the field enables us to select a single segment to act as a manageable data set for our study.…”

Section: Data For the Studymentioning

confidence: 99%

“…However the water saturation signal tends to dominate in this reservoir (Alvarez and MacBeth 2012) and the blue hardening persists -see wells I2, I3, I7 and I10 in the north, north-west and western portions of the segment. (between 1996-2002), of the sum of all negative amplitudes in a window defined from the top of T31a to the base of T31b (a known attribute for this field, see Floricich et al 2006). b) Geobodies in our case study that were achieved using seismic data.…”

Section: Data For the Studymentioning

confidence: 99%

Adaptive scaling for an enhanced dynamic interpretation of 4D seismic data

Falahat

Shams

MacBeth

2013

Geophysical Prospecting

View full text Add to dashboard Cite

A B S T R A C TIn this study, importance is drawn to the role of engineering principles when interpreting dynamic reservoir changes from 4D seismic data. In particular, it is found that in clastic reservoirs the principal parameters controlling mapped 4D signatures are not the pressure and saturation changes per se but these changes scaled by the corresponding thickness (or pore volume) of the reservoir volume that these effects occupy. For this reason, pressure and saturation changes cannot strictly be recovered by themselves, this being true for all data interpretation. This understanding is validated both with numerical modelling and analytic calculation. Interestingly, the study also indicates that the impact of gas saturation on the seismic can be written using a linear term but that inversion for gas saturation can yield at best only the total thickness/pore volume of the distribution. The above provides a basis for a linear equation that can readily and accurately be used to estimate pressure and saturation changes. Quantitative updates of the static and dynamic components of the simulation model can be achieved by comparing thickness or pore volume-scaled changes from the simulator with the corresponding quantities on the inverted observations.

show abstract

“…The AVO impact was also investigated for North Sea field data ( Floricich et al . ; Alvarez and MacBeth ). Using another modified form of Landrø’s results, Trani et al .…”

Section: Introductionmentioning

confidence: 98%

Using slowness and azimuth fluctuations as new observables for four‐dimensional reservoir seismic monitoring

Cacqueray

Roux

Campillo

2015

Geophysical Prospecting

View full text Add to dashboard Cite

Four‐dimensional imaging using geophysical data is of increasing interest in the oil and gas industries. While travel‐time and amplitude variations are commonly used to monitor reservoir properties at depth, their interpretation can suffer from a lack of information to decipher the parts played by different parameters. In this context, this study focuses on the slowness and azimuth angle measured at the surface using source and receiver arrays as complementary observables. In the first step, array processing techniques are used to extract both azimuth and incidence angles at the source side (departure angles) and at the receiver side (arrival angles). In the second step, the slowness and angle variations are monitored in a laboratory environment. These new observables are compared with traditional arrival‐time variations when the propagation medium is subject to temperature fluctuations. Finally, field data from a heavy‐oil permanent reservoir monitoring system installed onshore and facing steam injection and temperature variations are investigated. The slowness variations are computed over a period of 152 days. In agreement with Fermat's principle, strong correlations between the slowness and arrival‐time variations are highlighted, as well as good consistency with other techniques and field pressure measurements. Although the temporal variations of slowness and arrival time show the same features, there are still differences that can be considered for further characterization of the physical changes at depth.

show abstract

A New Technique for Pressure - Saturation Separation from Time-Lapse Seismic - Schiehallion Case Study

Cited by 10 publications

References 0 publications

A method to update fault transmissibility multipliers in the flow simulation model directly from 4D seismic

A method to update fault transmissibility multipliers in the flow simulation model directly from 4D seismic

Adaptive scaling for an enhanced dynamic interpretation of 4D seismic data

Using slowness and azimuth fluctuations as new observables for four‐dimensional reservoir seismic monitoring

Contact Info

Product

Resources

About