Derivation of refraction statics solution for 3D seismic data in an onshore prospect Niger Delta field

• Autorzy: Adizua Okechukwu Frank , Anakwuba Kenechukwu Emmanuel , Onwuemesi Ajana Godwin

Identyfikatory

DOI

10.7494/geol.2019.45.2.133

• Języki publikacji: EN

Abstrakty

EN

The near-surface imaging and characterization of an onshore prospect field in the Niger Delta was successfully carried out in a previous study (Adizua et al. 2019) using an integrated approach of combining inversion of refracted arrivals and uphole measurements. The output of that study which revealed the layer characteristics of the near-surface (0–500 m) over the prospect field is now being used as a starting model to derive a complete refraction statics solution to be adapted for processing the 3D seismic dataset from the prospect field. The complete statics solution derived included the field or datum statics, refraction statics, and the 1st and 2nd residual statics which addressed the unresolved and remnant spatial long and short wavelength statics effect on the traces across the investigated field. The comprehensive solution was then incorporated into a PROMAXTM routine and applied to the seismic datasets using appropriate flow commands to perform the statics correction procedure. The out-come of the derived and implemented statics correction was demonstrated on shot gathers from the field in FFID configuration. Results from the several shot gathers analyzed after the application of the statics correction across the field showed that traces were adjusted back to their appropriate positions. The reflectors became better aligned and assumed a near-hyperbolic pattern which is a positive indication that the derived and applied refraction statics solution was the most appropriate for the dataset.

Słowa kluczowe

EN

near-surface imaging; near-surface characterization; starting model; field statics; datum statics; refraction statics; 1nd residual statics; 2nd residual statics; FFID configuration; alignment of reflectors

• Wydawca: Wydawnictwa AGH
• Czasopismo: Geology, Geophysics and Environment
• Rocznik: 2019
• Tom: Vol. 45, no. 2
• Strony: 133--144
• Opis fizyczny: Bibliogr. 34 poz., rys.

Twórcy

autor

Adizua Okechukwu Frank

• University of Port Harcourt, Faculty of Science, Department of Physics (Applied Geophysics Option); River State, Nigeria
• Nnamdi Azikiwe University, Faculty of Physical Sciences, Department of Geological Sciences, Awka, Anambra State, Nigeria

autor

Anakwuba Kenechukwu Emmanuel

• Nnamdi Azikiwe University, Faculty of Physical Sciences, Department of Geological Sciences, Awka, Anambra State, Nigeria

autor

Onwuemesi Ajana Godwin

• Nnamdi Azikiwe University, Faculty of Physical Sciences, Department of Geological Sciences, Awka, Anambra State, Nigeria

Bibliografia

• Adizua O.F., Anakwuba E.K. & Onwuemesi A.G., 2019. A Hybrid approach to near-surface imaging and characterization for an onshore Niger Delta prospect field. Journal of Earth Sciences and Geotechnical Engineering – JESGE, 9, 1, 1–14.
• Baker G.S., 1999. Processing near-surface seismic ref lection data: A primer. Course Notes Series, 9, SEG Books, Tulsa, Oklahoma, USA.
• Bridle R. & Aramco S., 2009. Delay-Time refraction methods applied to a 3D seismic block. The Leading Edge, 28, 2, 212–215.
• Butler D.K. (ed.), 2005. Near-surface Geophysics. Investigations in Geophysics, 13, SEG Books, Tulsa, Oklahoma, USA
• Cox M., 1999. Static corrections for seismic reflection surveys. Geophysical References, 9, SEG Books, Tulsa, Oklahoma, USA.
• Deere J., 2009. Introduction to this Special Section – Statics. The Leading Edge, 28, 2, 190–191.
• Duan Y.Q., 2006. Residual static corrections based on refraction survey. Oil and Gas Prospecting – OGP, 41, 2, 32–35.
• Gardner L.W., 1939. An areal plan of mapping subsurface structures by refraction shooting. Geophysics, 4, 4, 247–259.
• Hagedoorn J.G., 1959. The Plus-Minus method of interpreting seismic ref lection sections. Geophysical Prospecting, 7, 158–182.
• Hampson D. & Russell B., 1984. First-Break interpretation using generalized inversion. Journal of the Canadian Society of Exploration Geophysicists, 20, 40–54.
• Henley D.C., 2012. Interferometric applications in static corrections. Geophysics, 77, 1, 1–13.
• Huang M.Z., Feng Z.Y. & Zhou D.T., 2008. Directly iterated statics correction method in Offset Domain and its application. Progress in Exploration Geophysics, 31, 2, 122–128.
• Jing X.L., 2003. Two steps solution methods for big residual static corrections. Oil and Gas Prospecting – OGP, 38, 1, 22–26.
• Keho T.H. & Kelamis P.G., 2012. Focus on Land Seismic Technology: The Near-surface Challenge. The Leading Edge, 31, 62–68.
• Knox W.A., 1967. Multilayer near-surface refraction computations. [in:] Musgrave A.W. (ed.), Seismic Refraction Prospecting, Society of Exploration Geophysicists, 197–216.
• Lawton D.C., 1989. Computation of refraction statics corrections using first-break travel time differences. Geophysics, 54, 1289–1296.
• Lawton D.C., 1990. A nine-component refraction statics experiment. [in:] SEG Technical Program Expanded Abstracts 1990, Society of Exploration Geophysicists, 1089–1092.
• Li L., Chen X.J. & Jing X.L., 2011. Multi-scale inversion algorithm for seismic residual statics correction and its application. Xinjing Petroleum Geology, 32, 4, 402–405.
• Li P., Feng Z. & Li Z., 2009. Statics correction technology and applications in complex areas of western China. The Leading Edge, 28, 2, 1384–1386.
• Liu L.S., 1998. Constrained first arrival pick up and first-break residual static correction. Oil and Gas Prospecting – OGP, 35, 5, 604–610.
• Luo Y.W., Yang J. & Duan W.X., 2010. Comparing between several statics correction methods. Petroleum Instruments, 24, 5, 41–43.
• Marsden D., 1993a. Statics corrections – a review, part I. The Leading Edge, 12, 1, 43–49.
• Marsden D., 1993b. Statics corrections – a review, part II. The Leading Edge, 12, 2, 115–120.
• Marsden D., 1993c. Statics corrections – a review, part III. The Leading Edge, 12, 3, 210–216.
• Opara C., Adizua O.F. & Ebeniro J.O., 2018. Application of static correction in the processing of 3D seismic data from onshore Niger Delta. Universal Journal of Geoscience, 6, 1, 1–7.
• Palmer D., 1981. The Generalized Reciprocal Method of seismic refraction interpretation. Geophysics, 36, 1508–1518.
• Ponnam S., Navin M., Sarvind R., Sudhakar M. & Dutta N.M., 2013. Field Statics estimations: A case history from North Assam Shelf, Assam, India. [in:] 10th Biennial International Conference and Exposition – Kochi 2013,Society of Petroleum Geophysicists, 287–291.
• Russell B.H., 1990. Statics correction – A tutorial. CSEG Recorder, 14, 3, 16–30.
• Sheriff R.E., 1991. Encyclopedic Dictionary of Exploration Geophysics. 3rd ed., Geophysical References, 1, Society of Exploration Geophysicists.
• Short K.C. & Stauble A.J., 1967. Outline of the Geology of Niger Delta. American Association of Petroleum Geologists Bulletin, 51, 761–779.
• Uko E.D., Ekine A.S. & Ebeniro J.O., 1992. Weathering Structure of the East-Central Niger Delta, Nigeria. Geophysics, 57, 9, 1228–1233.
• Yilmaz O., 2001. Seismic Data Analysis: Processing, Inversion, and Interpretation of Data. Investigations in Geophysics, 10, SEG Books, Tulsa, Oklahoma, USA.
• Yin C., Xiong X.J. & Zhang B.L., 2004. The Study of using the fourth accumulated component in residual static corrections. Gas Industry, 24, 12, 48–50.
• Zhu X.S., Gao R., Li Q.S., Guan Y., Lu Z. & Wang H., 2014. Static corrections methods in the processing of deep reflection seismic data. Journal of Earth Science, 25, 2, 299–308.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).