Seismic Inversion For Improved Reservoir Characterization Validate well placement and avoid expensive mistakes

Challenge

The complexity of geology in certain reservoir types, such as thin-layered, tight and carbonate reservoirs, etc, makes the prediction of reservoir rock distribution and connectivity in-between the wells a very challenging task. Planning new wells without a good description of the reservoir is a very risky business. iRes-Geo’s quantitative seismic inversion workflow is specially designed to help validate and improve well planning and obtain a realistic geomodel.

Solution

Seismic inversion is a tech-laden and experience-demanding field of applied geophysics. With the help of commercial and in-house tools, our highly-capable QI geophysicists will take a deep dive into the seismic data and retrieve the knowledge about the reservoir from the finest features in the seismic waveforms. iRes-Geo offers the following seismic inversion services:

  • Colour inversion
  • Sparse-spike inversion
  • Prestack simultaneous seismic inversion
  • Post stack seismic inversion
  • Stochastic seismic inversion
  • Bayesian inversion
  • Petrophysical inversion based on rock physic model
  • Facies probability for facies model

Application

  • Detailed mapping of reservoir facies
  • Production optimization
  • EOR feasibility study
  • Well planning and field re-development
  • Geomodelling

Benefit

  • Improved knowledge about the distribution of reservoir rock and “sweet spots”
  • Avoid serious mistakes in well planning, poor decision-making and disastrous economic effects
  • Better understanding of reservoir connectivity
Why advanced seismic inversion?
  • Much higher vertical resolution
  • Availability of multiple high frequency realisations
  • Consistency with geostatistical and spatial trend in well logs
  • Results ready for reservoir modelling and uncertainty analysis

Case study 1: Improve The Understanding of Complex Stacked Channels

The channel element pattern of stacked channel complex has a huge impact on reservoir connectivity. Channel stacking impacts on well-planning with well placement, and the surface facility location, are largely determined by this pattern. Our fast scenario-testing workflow is designed to improve the understanding of complex stacked channel architecture and help mitigate the risk of the field development plan.

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Case study 2: Validate Well Planning Using Seismic Facies Probability

With acoustic impedance and elastic properties resulting from advanced seismic inversion technologies, seismic facies probabilities can be derived whereby well planning can be verified and improved on.

Case study 2: Validate Well Planning Using Facies Probability Cube

With impedance and elastic properties resulting from advanced seismic inversion technologies, seismic facies probabilities can be derived whereby well planning can be verified and improved on.

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Case study 3: Improve The Understanding Of Reservoir Connectivity

Seismic data falls short of the vertical resolution desired by geologists and reservoir engineers in the characterization of the reservoir connectivity. Stochastic seismic inversion is one method that may improve this long-standing problem. The result of the method is a 3D volume with a seismic-like areal resolution and a log-like vertical resolution that honours both the log data and the seismic data allowing for a better understanding of reservoir connectivity.

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