Petroleum Reservoir Evaluation and Development >
2020 , Vol. 10 >Issue 5: 34 - 41
DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2020.05.005
Adaptability evaluation and analysis of low density 3D seismic exploration method for shale gas
Received date: 2020-02-19
Online published: 2020-09-24
3D seismic exploration technology with the mode of “Wide-azimuth, high-density and broadband” is widely used in the exploration of conventional and unconventional oil and gas. Technical effectiveness and economy are the two main factors restricting seismic exploration, especially unconventional oil and gas exploration（shale oil and gas, coalbed methane, etc.）, whose economy is the main influencing factor. Taking 3D seismic exploration for the shale gas with normal pressure in Wulong as an example, the successful 3D method of shale gas with low density and economy is introduced, and the purpose of reducing the exploration cost of 3D seismic data and improving the exploration effect is achieved. Combined with the similar conventional 3D seismic exploration examples in Taozidang area, the S/N ratio is evaluated and analyzed emphatically. It is pointed out that the application geological background with relatively simple structure, regional enrichment and strong reflective seismic interface, low density observation system with high cost performance, single shot record with high energy and SNR, and methods of improving S/N ratio and high-precision static correction for seismic exploration are the keys to the success of low density 3D shale gas. The application of deep well and large dosage saturation excitation to ensure the energy and S/N ratio of seismic acquisition data, improve the ratio of effective seismic record ratio, and the method and measure of field management are worthy of reference. Its successful experience has been widely used in 3D seismic exploration in Guihua and Yangchungou.
Houyu LIU . Adaptability evaluation and analysis of low density 3D seismic exploration method for shale gas[J]. Petroleum Reservoir Evaluation and Development, 2020 , 10(5) : 34 -41 . DOI: 10.13809/j.cnki.cn32-1825/te.2020.05.005
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