1887
Volume 39 Number 4
  • ISSN: 0263-5046
  • E-ISSN: 1365-2397
PDF

Abstract

Abstract

The recent downturn in the industry has led to a focus on maximizing economic recovery and low-frequency seismic sounding (LFS) technology has the potential to delineate oil and gas reservoirs to derisk drilling decisions and shorten the appraisal and development timeframe. The change in the low-frequency range of natural microseismic background noise is due to the mechanics of fluid saturated, fractured and porous media, with oil and gas reservoirs having a high-velocity dispersion and attenuation at low frequencies.

Here, we demonstrate the offshore deployment, acquisition and applicability of LFS to delineate hydrocarbon deposits in the North Sea. The spectra of the dry and oil-bearing sections of the surveyed area is observed in the frequency range of 0.6–1.9 Hz, while noise interference in the form of Scholte waves is also observed in the low-frequency range of 2Hz. We developed new filtering procedures to remove interference and exclusively select vertically directed P waves from the recorded signal. The result is a map of correlation coefficients which characterize the absence and presence of hydrocarbons as a probability map of hydrocarbon. The offshore trial has confirmed the application of the LFS technology highlighting areas that can be improved to deliver optimal results.

Loading

Article metrics loading...

/content/journals/10.3997/1365-2397.fb2021027
2021-04-01
2024-04-24
Loading full text...

Full text loading...

/deliver/fulltext/fb/39/4/fb2021027.html?itemId=/content/journals/10.3997/1365-2397.fb2021027&mimeType=html&fmt=ahah

References

  1. ArutyunovS.L.
    [1993] Direct method of acoustic low-frequency oil and gas exploration (results and perspectives) [Text] / S.L.Arutyunov, O.L.Kuznetsov [et al.] // Collection of the international scientific conference «Geophysicist and modern world». – Moscow, 1993.
    [Google Scholar]
  2. V.A.Korneev, G.M.Goloshubinz, T.M.Daley, D.B.Silin
    [2001], Seismic Low-frequency Effects in Monitoring Fluid-saturated ReservoirsGeophysics, 69(2), 2004.
    [Google Scholar]
  3. Birialtsev, E.
    Experience in Low-Frequency Spectral Analysis of Passive Seismic Data in Volga-Ural Oil-Bearing Province [Electronic resource]/ E.Birialtsev, E.Eronina, N.Shabalin, D.Rizhov, V.Rizhov, A.A.Vildanov // IPTC 13678. International Petroleum Technology Conference (IPTC), DOHA, QATAR, 2009.
    [Google Scholar]
  4. Sharapov, I.R., Manasyan, A.E., Papukhin, S.P., Shabalin, N.Y., Rizhov, V.A. and Feofilov, S.A.
    [2016]. Experience of Implementation of Low-Frequency Seismic Sounding at Exploration Stage in the Samara Region.7th International Conference & Exhibition EAGE.Saint Petersburg, Russia.
    [Google Scholar]
  5. Quintal, B., Schmalholz, S.M. and Podladchikov, Y.Y.
    Low-frequency reflections from a thin layer with high attenuation caused by inter-layer flow:Geophysics, 74(1)
    [Google Scholar]
  6. Wapenaar, K.
    [2004] Retrieving the elastodynamic Green’s function of an arbitrary inhomogeneous medium by cross-correlation:Physical Review Letters, 93, 254301.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/journals/10.3997/1365-2397.fb2021027
Loading
/content/journals/10.3997/1365-2397.fb2021027
Loading

Data & Media loading...

  • Article Type: Research Article
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error