Modeling of inclined fracture network and calculation of fracture effect on seismic signal spectrum

Shatskaya, Anastasiya A.; Немирович-Данченко, М М; Terre, D A

doi:10.1088/1755-1315/21/1/012016

Cited by 1 publication

(2 citation statements)

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“…In [1,2] we have proposed and further developed the method of running time window spectral analysis to determine fractured zones. The technique for amplitude spectrum analysis of seismic fields was based on the results of numerical finite-difference modeling of forward problems in mechanics of deformable solids in fractured bodies [3] and Gregory's laboratory test published in [4].…”

Section: Problem Settingmentioning

confidence: 99%

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Detection of attenuation zones in a time section based on running window filtration

Islyamova

Немирович-Данченко

Terre

2016

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. When developing oil reservoirs composed of carbonate rocks and those characterized by complex structure, the production well flow rate is largely determined by reservoir fracturing/ porosity rather than structure. These reservoir properties can often be reflected in a time section as significant attenuation of a seismic signal. The running time window spectral analysis has been proposed in the previous research to detect fractured zones. The calculations of seismic field diffraction due to a single pore and pore ensemble effects were made. The present research indicates that reservoir fracturing or porosity can cause qualitatively similar behavior of reflected signal amplitude spectra. Based on this finding, a rejection filter was constructed and applied to a real time section of the field in Tomsk Oblast, Prony and Fourier spectra being tested. Problem settingIn [1, 2] we have proposed and further developed the method of running time window spectral analysis to determine fractured zones. The technique for amplitude spectrum analysis of seismic fields was based on the results of numerical finite-difference modeling of forward problems in mechanics of deformable solids in fractured bodies [3] and Gregory's laboratory test published in [4].The unnormalized spectra obtained in the laboratory test and numerical computation are given in figure 1 a and b. Their comparison indicates that a section of high frequencies drops drastically within the spectrum of a wave reflected off the fractured zone; consequently, it distinctly differs from the wave spectrum in a continuous medium.

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Section: Problem Settingmentioning

confidence: 99%

“…Figure 1. a -unnormalized spectra of an incident (1) and a reflected (2) wave in a fractured layer [1,2], b -figure from [4]; spectra of an incident (А) and reflected (B) signals in the sandstone sample…”

Section: Problem Settingmentioning

confidence: 99%