Volume 47 Issue 4
Aug.  2019
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WANG Shuwei. Application of seismic exploration technology in forecasting unconventional gas enrichment area of coal measures[J]. COAL GEOLOGY & EXPLORATION, 2019, 47(4): 159-164. DOI: 10.3969/j.issn.1001-1986.2019.04.024
Citation: WANG Shuwei. Application of seismic exploration technology in forecasting unconventional gas enrichment area of coal measures[J]. COAL GEOLOGY & EXPLORATION, 2019, 47(4): 159-164. DOI: 10.3969/j.issn.1001-1986.2019.04.024
shu

Application of seismic exploration technology in forecasting unconventional gas enrichment area of coal measures

  • Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China

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Science and Technology Innovation Fund of Xi'an Research Institute of CCTEG(2017XAYZD10,2013XAYCX018)

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  • Received Date: January 14, 2019
  • Published Date: August 24, 2019
    Graphical Abstract
    • Abstract
  • For forecasting unconventional gas enrichment area in coal measures of eastern Ordos basin, seismic exploration was used to forecast the gas in this new field. First of all, it took the post-stack impedance inversion to forecast the lithology of the reservoir, it can get the number of sample points from the impedance threshold, and get the thickness of time by cal-culating the sampling rate, after that it can get the strata thickness by multiplying the thickness of time and the velocities of strata; second, it took the pre-stack AVO inversion to forecast the lithology gas-bearing properties of the reservoir, based on analyzing the relationship between gas saturation and the related AVO attribute parameters, we got the most sensitive attrib-ute parameter of the favorable gas bearing areas. At last, it took the thicker reservoir and the low pseudo-Poisson's ratio at-tribute feature as the favorable gas bearing areas, and it forecasted the enrichment area of sandstone gas and shale gas in eighth member of Shihezi Formation, Shanxi Formation and Benxi Formation of the exploration area, and drilling verified that the effect is good. The result of forecasting the enrichment area shows that seismic exploration forecasting this new field of unconventional gas enrichment area in coal measures in this region is feasible, and this method has a reference meaning for forecasting unconventional gas enrichment area in coal measures in other areas.
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    • References (21)
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