1887
Volume 39 Number 6
  • ISSN: 0263-5046
  • E-ISSN: 1365-2397

Abstract

Abstract

The measurements of vertical seismic profiles (VSP) used in the petroleum industry are often limited to direct arrivals to establish time-depth laws. Many other measurements such as PP and PS corridor stacks, offset vertical seismic profiles (OVSP) and walkaway can help to predict P and S wave impedances estimated by inversion of surface seismic data.

This article shows the use of all available VSP records to constrain the inversion of surface seismic data and predict matrix properties of Carboniferous and Devonian intervals in the Machukhske gas field in the Ukrainian Dnieper-Donetsk basin.

The use of PS corridor stack, in addition to PP corridor stack, allows a better optimization of the S impedance at the well. Moreover, corridor stacks allow a better estimate of the P and S impedance below the well TD than surface seismic data alone, and therefore an enhanced characterization of the Devonian sands, which has been drilled by only a few wells. OVSPs help to build a more reliable a priori model by confirming or discarding the faults identified on the 3D seismic data.

Results of reservoir characterization show a clear impact of the VSP integration on lithology prediction from surface seismic data.

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2021-06-01
2021-06-20
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