1887

Abstract

Summary

Identification of reflectors in formation is a research focus in reservoir evaluation with single borehole acoustic reflection imaging method. Through improving the constraint conditions, the high-resolution Radon transform has been introduced to eliminate the trailing phenomenon and to concentrate energy of transformed signal in Radon domain, which can simplify the extraction and preserve the energy of reflected wave. Combining the extracted reflections and appropriate velocity models, the imaging quality and resolution can be enhanced to distinguish fractures, vugs and geological structures. In the images, a fracture appears in a form of shortly bending interface, while a vug appears as an isolated point. Based on these conclusions, the high-resolution imaging method is used to evaluate reservoirs in central part of China. The results indicate that the images can give detail information about reflectors near borehole within around 20 metres. Moreover, features of imaging results in gas reservoir have been investigated with field data. It is found that the oil-gas valent weight linearly increases with the increasing of reflection energy, accordingly, the energy can be taken as an effective indicator of gas reservoir.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201901654
2019-06-03
2020-07-06
Loading full text...

Full text loading...

References

  1. Esmersoy, C., Chang, C., Kane, M., et al.
    [1998] Acoustic imaging of reservoir structure from a horizontal well. The Leading Edge, 17(7), 940–946.
    [Google Scholar]
  2. Tang, X. M., and Patterson, D. J
    . [2009] Single-well S-wave imaging using multicomponent dipole acoustic-log data. Geophysics, 74(6), WCA211-WCA223.
    [Google Scholar]
  3. Patterson, D., Mekic, N., Bolshakov, A., et al.
    [2013] Unconventional Reservoir Fracture Evaluation Utilizing Deep Shear-Wave Imaging. IPTC International Petroleum Technology Conference.
    [Google Scholar]
  4. Pistre, V., Kinoshita, T., Endo, T., et al.
    [2005] A modular wireline sonic tool for measurements of 3D (azimuthal, radial, and axial) formation acoustic properties. SPWLA 46th Annual Logging Symposium, pp. P1–P13.
    [Google Scholar]
  5. Sacchi, M.D., Ulrych, T.J
    . [1995] High-resolution velocity gathers and offset space reconstruction. Geophysics, 60(4), 1169–1177.
    [Google Scholar]
  6. Trad, D.O., Ulrych, T.J, Sacchi, M.D
    . [2002] Accurate interpolation with high-resolution time-variant Radon transforms. Geophysics, 67(2), 644–656.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201901654
Loading
/content/papers/10.3997/2214-4609.201901654
Loading

Data & Media loading...

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