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Volume 57, Issue 4
  • E-ISSN: 1365-2478

Abstract

ABSTRACT

The founder of the Russian school of direct interpretation of potential fields (with minimal prior geological‐geophysical information) was V.M. Berezkin, who introduced the operator of total normalized gradient for the 2D interpretation of profile gravity data sets. This operator was successfully applied in searches of hydrocarbon reservoirs. The further development of this approach (the so‐called quasi‐singular points method) has allowed solution also to various structural problems, using mathematical criteria for the transition from extremes of total normalized gradient fields to coordinates of anomalous sources. The main numerical evaluation strategy is based on stabilized downward continuation of field derivatives and specific use of the filtration properties of Fourier series approximation. The characteristic properties of the quasi‐singular points method are: 1) presentation of a more general total normalized gradient function through additional parameters (derivative order , form of smoothing function , number of Fourier coefficients * with maximal ), optimum values being chosen during a peak‐spectrum analysis of the interpreted function; 2) calculation of the set of total normalized gradient fields for various values of */, representing coordinate systems {,*/} as an ‘axes tree’ of extrema, where each 2D total normalized gradient field is representationally compressed in a 1D line, permitting a) immediate overview of the positions of the axes in all variants of the calculated fields and b) reduction of the retained information, as required in subsequent interpretation; 3) development of two criteria for transition from extrema of total normalized gradient fields to the coordinates of anomaly sources. The quasi‐singular points method is intended for tracing limiting gently‐sloping boundaries, if their micro‐relief features are sources of the interpreted anomaly but sub‐vertical contacts may also be traced. The method has been tested in delineating various geological structures. One of the most challenging, successfully achieved, was tracing of the Moho discontinuity and study of the upper mantle, using only Bouguer anomaly data along interpretation profiles. This is attested in an example of two regional profiles intersecting the European part of Russia. The central part of one of them coincides with the results from a deep seismic profile.

© 2009 European Association of Geoscientists & Engineers
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2009-05-12
2024-04-24

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References

  1. AydinA.2007. Interpretation of gravity anomalies with the normalized full gradient (NFG) method and an example. Pure and Applied Geophysics164, 2329–2344.
    [Google Scholar]
  2. BerezkinV.M.1967. Application of the total vertical gradient of gravity for determination of the depth to the sources of gravity anomalies. Razvedochnaya Geofizika (Exploration Ggeophysics) 18, 69–79. (in Russian)
     [Google Scholar]
  3. BerezkinV.M.1988. Method of the Total Gradient in Geophysical Prospecting . Nedra, Moscow . (in Russian)
     [Google Scholar]
  4. BerezkinV.M. and BuketovA.P.1965. Application of the harmonic analysis for the interpretation of gravity data. Prikladnaya geofizika (Applied Geophysics) 46, 161–166. (in Russian)
     [Google Scholar]
  5. ElysseievaI.S.1980. Influence of the procedure of a linear background subtraction in the GH ‐method on redistribution of inhomogeneities location in an investigated section. Prikladnaya Geofizika (Applied Geophysics) 91, 92–97. (in Russian)
     [Google Scholar]
  6. ElysseievaI.S.1995. Methodical Recommendations for the Interpretation of Gravity and Magnetic Data by Means of the Quasi‐singular Points Method. VNIIGeofizika, Geoinfomark, Moscow. (in Russian)
  7. ElysseievaI.S.2003. Choice of initial parameters of interpreted potential functions. Principle of focussing. EAGE Conference on Geophysics of the 21st Century – The Leap into the Future, 1–4 September, Expanded Abstracts, PS9.
  8. ElysseievaI.S., BerezkinV.M. and EgorovaI.P., 1972. Application of the Filon’ method for spectral decomposition at use of total normalized gradient GH (x,z). Prikladnaya Geofizika (Applied Geophysics) 67, 139–145. (in Russian)
     [Google Scholar]
  9. ElysseievaI.S., ChernovA.A., PaštekaR. and BoldyrevaV.A.2004. Development of Berezkin's ideas in geophysics in last third of 20th century in Russian and abroad. Razvedka i ochrana nedr (Reconnaissance and Protection of Subsoil) 7, 40–44. (in Russian)
     [Google Scholar]
  10. ElysseievaI.S. and CvetkovaN.P.1989. First experience of the application of cosine expansion within the interpretation of anomalous curves, deformed by strong trend effect. Razvedochnaya Geofizika (Exploration Geophysics) 110, 124–132. (in Russian)
     [Google Scholar]
  11. ElysseievaI.S., GiorgadzeI.G., KodzhebaschN.N. and KozhevnikovaE.S. 1997.Quasi‐singular points method as development of the Bereskin's method. Geofizika (Geophysics) 4, 53–60. (in Russian)
     [Google Scholar]
  12. MushayandebvuM.F., Van DrielP., ReidA.B. and FairheadJ.D.2001. Magnetic source parameters of two‐dimensional structures using extended Euler deconvolution. Geophysics66, 814–823.
    [Google Scholar]
  13. ReidA.B., AllsopJ.M., GranserH., MilletA.J. and SomertonI.W.1990. Magnetic interpretation in three dimensions using Euler deconvolution. Geophysics55, 80–91.
    [Google Scholar]
  14. StrakhovV.N.1971. Determination of singular points of two‐dimensional fields by means of approximation with functions of exponential type with finite degree. Prikladnaya Geofizika (Applied Geophysics) 64, 85–109.
    [Google Scholar]
  15. ThompsonD.T.1982. EULDPH: A new technique for making computer‐assisted depth estimates from magnetic data. Geophysics47, 31–37.
    [Google Scholar]
  16. TroshkovG.A.1977. Problems of localization of the singularities of potential fields in three‐dimensional space. Izv. AN SSSR, Fizika zemli (Reports of Academy of Sciences USSR, Earth Physics) 10, 79–82. (in Russian)
     [Google Scholar]
  17. VoskoboynikovG.M. and NachapkinN.I.1969. Method of singular points for interpretation of potential fields. Izv. AN SSSR, Fizika zemli (Reports of Academy of Sciences USSR, Earth Physics) 5, 24–39. (in Russian)
     [Google Scholar]
  18. ZengH., MengX., YaoC., LiX., LouH., GuangZ. and LiZ.2002. Detection of reservoirs from normalized full gradient of gravity anomalies and its application to Shengli oil field, east China. Geophysics67, 1138–1147.
    [Google Scholar]
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Direct interpretation of 2D potential fields for deep structures by means of the quasi‐singular points method
Geophysical Prospecting 57, 683 (2009); https://doi.org/10.1111/j.1365-2478.2009.00806.x
/content/journals/10.1111/j.1365-2478.2009.00806.x
/content/journals/10.1111/j.1365-2478.2009.00806.x
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