Fresnel Zone Wavepath Tomography - Theory

Nurhandoko, Bagus Endar B.; Ashida, Yuzuru

doi:10.3997/2352-8265.20140017

Cited by 3 publications

(8 citation statements)

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“…The data is computed and imaged using Fresnel interpolated wave-path (FIW) wide-band inversion tomography. The FIW is an interpolation between imaginary part of Rhytov scattering wave-path and ray-path [1][2][3][4] . FIW is then combined with wide band inversion for producing a stable inversion procedure.…”

Section: Methodsmentioning

confidence: 99%

“…The results showed that tomography based on FIW could handle the limitation of configuration angle, sparseness configuration and resulting good image. We have used this method in many difficult cases of field data such as: subsurface tunnel imaging and also void-fracture imaging in volcanic rock 2,4,5) .…”

Section: Methodsmentioning

confidence: 99%

“…Fresnel interpolated wavepath (FIW) is a interpolation approach of raypath and the imaginary part of Rhytov approximation wavepath. Eventhough this wavepath contains scattering wavepath, by following formulation we can simplify of calculation procedure of FIW by means travel times from source to any points, receiver to any points and source to receiver see Nurhandoko 5,6) .…”

Section: Fresnel Interpolated Wavepath Tomographymentioning

confidence: 99%

“…) | ( Then, we interpolate L wavepath of equation (7) with raypath and normalized it to produce Fresnel zone interpolated wavepath 1,6) .…”

mentioning

confidence: 99%

See 3 more Smart Citations

Characterization of Subsurface Coal Using Seismic Tomography : a Case Study in Muara Enim South Sumatera

Nurhandoko

Mubarok²,

Sukmana³

et al. 2016

ijp

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In recent years, coal as well as coal bed methane becomes important energy resources. Therefore, the characterization of coal seam is also important in predicting the quality, porosity and pore’s fluid of CBM’s reservoir. Seismic wave is very important parameter to characterize reservoir’s properties of coal bed methane as well as quality of coal. In this paper, we show methodology to image the subsurface velocity using seismic tomography. It is very useful for characterizing the coal’s seam as well as to detect the position of intrusion body. A case study was carried out in Suban Block, Muara Enim Sumatera. This coal mining block contains igneous rock intrusion which becoming main control of coal’s quality. Coal which is close with intrusion body usually has better quality than far zone. To acquire the data, we used 48 channels of seismic recorder controlled by telemetry for controlling the shot and first break. Then, data are processed by Fresnel interpolated wave-path (FIW) wide-band inversion tomography. The results show that the intrusion body can be imaged clearly and the seam coal can be delineated from well information. The information in well controls are quite match with tomography results.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Fresnel Interpolated Wavepath Tomographymentioning

confidence: 99%

“…) | ( Then, we interpolate L wavepath of equation (7) with raypath and normalized it to produce Fresnel zone interpolated wavepath 1,6) .…”

mentioning

confidence: 99%

See 2 more Smart Citations

Characterization of Subsurface Coal Using Seismic Tomography : a Case Study in Muara Enim South Sumatera

Nurhandoko

Mubarok²,

Sukmana³

et al. 2016

ijp

View full text Add to dashboard Cite

show abstract

“…The results shown that tomography based on FIW could handle the limitation of configuration angle, sparseness configuration and resulting good image. We have used this method in many difficult cases of field data such as: subsurface tunnel imaging and also void-fracture imaging in volcanic rock [1][2][3] .…”

Section: Introductionmentioning

confidence: 99%

Marine Seismic Tomography for Detecting Fracture and Void of Subsurface Seabed : a Theoretical Framework Development and Application of Wide-Band Fresnel Tomography

Nurhandoko

Ambia

Triyoso³

et al. 2016

ijp

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Fracture as well as void can generate unstable structure in offshore building. We use seismic tomography based on scattering wave instead of conventional raypath seismic tomography. Conventional raypath tomography usually needs dense source-receiver configuration as well as wide-angle measurement. Therefore, it will be high cost in field data acquisition. We propose scattering wavepath tomography by means of Fresnel interpolated wavepath (FIW) wide-band inversion. FIW is an interpolation between imaginary part of Rhytov scattering wavepath and raypath. Then, FIW is combined with wide band inversion procedure to handle sparseness configuration of measurement. By this method, smooth constraint is implemented more naturally by based on wave's spectrum. In this paper, we showed some applications of Wide-band inversion of FIW tomography in imaging fracture and void in marine carbonate sea bed.

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RETRACTED: Geo‐archaeological prospecting of Gunung Padang buried prehistoric pyramid in West Java, Indonesia

Natawidjaja,

Bachtiar,

Nurhandoko

et al. 2023

Archaeological Prospection

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The multidisciplinary study of Gunung Padang has revealed compelling evidence of a complex and sophisticated megalithic site. Correlations between rock stratifications observed through surface exposures, trenching and core logs, combined with GPR facies, ERT layers, and seismic tomograms, demonstrate the presence of multi‐layer constructions spanning approximately 20–30 m. Notably, a high‐resistive anomaly in electric resistivity tomography aligns with a low‐velocity anomaly detected in seismic tomography, indicating the existence of hidden cavities or chambers within the site. Additionally, drilling operations revealed significant water loss, further supporting the presence of underground spaces. Radiocarbon dating of organic soils from the structures uncovered multiple construction stages dating back thousands of years BCE, with the initial phase dating to the Palaeolithic era. These findings offer valuable insights into the construction history of Gunung Padang, shedding light on the engineering capabilities of ancient civilizations during the Palaeolithic era.

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Fresnel Zone Wavepath Tomography - Theory

Cited by 3 publications

References 0 publications

Characterization of Subsurface Coal Using Seismic Tomography : a Case Study in Muara Enim South Sumatera

Characterization of Subsurface Coal Using Seismic Tomography : a Case Study in Muara Enim South Sumatera

Marine Seismic Tomography for Detecting Fracture and Void of Subsurface Seabed : a Theoretical Framework Development and Application of Wide-Band Fresnel Tomography

RETRACTED: Geo‐archaeological prospecting of Gunung Padang buried prehistoric pyramid in West Java, Indonesia

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