An improved local phase variation attribute and its application in channels detection

• Autorzy: Shi Lei , Liu Junzhou , Liu Lanfeng , Wang Tieyi , Su Yuxin

Identyfikatory

DOI

10.1007/s11600-020-00420-5

• Języki publikacji: EN

Abstrakty

EN

Instantaneous phase is a commonly used attribute for structural and stratigraphic feature characterization. The conventional calculation method is to construct the complex-valued seismic trace, then get the ratio of the imaginary part to the real part and fnally compute the antitangent of the ratio as the instantaneous phase attribute. In this way, the phase result at one time sample point is the total phase rotation from the beginning of the trace to this point, which means the traditional instantaneous phase is cumulative. Furthermore, the phase obtained by arctangent is usually entangled, which makes it more difcult to apply to seismic interpretation. To address the two issues above, we proposed a new way to calculate the improved local phase variation attributes. Firstly, we calculate traditional instantaneous phase and unwrap it. Then we set a time window on the unwrapped phase to compute the local phase variation by using some diference methods. Finally, we slide the time window on the whole trace to obtain the fnal phase variation attributes. This strategy turns the whole cumulative value into local variational value, which makes the obtained local phase variation nearly zero in the continuous region but changed greatly at the interface or the abnormal structure areas. Tested by the numerical model and the real data, the proposed attributes have a good application efect in channel detection, which provides a train of thought to seismic structure interpretation with phase attributes.

Słowa kluczowe

EN

discontinuity detection; instantaneous phase; local phase variation; sliding time window

PL

wykrywanie nieciągłości; faza chwilowa; lokalna zmienność faz

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2020
• Tom: Vol. 68, no. 2
• Strony: 357--364
• Opis fizyczny: Bibliogr. 22 poz.

Twórcy

autor

Shi Lei

• Exploration and Production Research Institute, Sinopec, Beijing 100083, China

autor

Liu Junzhou

• Exploration and Production Research Institute, Sinopec, Beijing 100083, China

autor

Liu Lanfeng

• Exploration and Production Research Institute, Sinopec, Beijing 100083, China

autor

Wang Tieyi

• State Key Laboratory of Petroleum Resources and Prospecting, CNPC Key Laboratory of Geophysical Exploration, China University of Petroleum, Changping, Beijing 102249, China

autor

Su Yuxin

• State Key Laboratory of Petroleum Resources and Prospecting, CNPC Key Laboratory of Geophysical Exploration, China University of Petroleum, Changping, Beijing 102249, China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021)