Numerical simulation of shear wave attenuation in borehole inserted by a horizontal fracture

• Autorzy: Yan Binpeng , Ou Weiming , Huang Xingguo , da Silva Nuno Vieira

Identyfikatory

DOI

10.1007/s11600-020-00503-3

• Języki publikacji: EN

Abstrakty

EN

The amplitude of shear waves is attenuated when passing through horizontal fractures crossing a borehole. In this study, we investigate the amplitude attenuation of shear waves throughout simulation of full-wave acoustic logging with the fnite-diference method. As the fracture aperture is very small, it needs to be represented in a very fne gird when carrying out fnite-diference simulation. Therefore, the variable-grids fnite-diference method is adopted to avoid over-sampling in the non-fracture regions, yielding substantial savings in computational cost. We demonstrate the accuracy of waveform modeling with the variable-grid fnite-diference by benchmarking against that obtained with the real-axis integrating method. We investigated the efects of several important parameters including fracture aperture, distance from receiver to fracture, borehole radius and extended distance utilizing that benchmarked variable-grid fnite diference code. We determined a good linear relationship between the attenuation coefcient of shear wave amplitude and the fracture aperture. Then, the efects of distance from receiver to fracture, the borehole radius and the extended distance of fracture on shear wave attenuation are also studied. The attenuation coefcient of shear wave becomes smaller with the increasing borehole radius. While, it increases as the distance from receiver to fracture and the extended distance of fracture increase. These efect characteristics are conducive to the use of shear wave to evaluate fractures.

Słowa kluczowe

EN

horizontal fracture; acoustic logging; finite difference; shear wave attenuation; variable grids

PL

szczelina pozioma; profilowanie akustyczne

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2020
• Tom: Vol. 68, no. 6
• Strony: 1715--1726
• Opis fizyczny: Bibliogr. 24 poz.

Twórcy

autor

Yan Binpeng

• China University of Petroleum-Beijing At Karamay, Xinjiang, China

autor

Ou Weiming

• The 54th Research Institute of China Electronics Technology Group, Shijiazhuang, China

autor

Huang Xingguo

• Department of Earth Sciences, University of Bergen, Allegaten 41, 5020 Bergen, Norway

autor

da Silva Nuno Vieira

• Department of Earth Science and Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
• Present Address: Total E&P UK, Tarland Road, Westhill, Aberdeen AB32 6JZ, UK

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