PetroChina's low-frequency seismic excitation technology has leapt to the international leading level

The Oriental Geophysical Exploration "low-frequency vibroseis and low-frequency seismic exploration technology" project won the first prize of China's geophysical science and technology progress, marking the international geophysical low-frequency seismic excitation technology reached the international leading level.

The low-frequency information in seismic data is one of the important properties of oil and gas, which is very effective for improving reservoir resolution, full-wave field seismic inversion, improving deep imaging and direct detection of oil and gas. The low-frequency source signal is beneficial to improve the vertical resolution of the reservoir, and can directly detect oil and gas, which is very beneficial to improve the quality of deep imaging and help to obtain better underground geological data on the special surface of igneous rocks.

In early 2012, the low frequency vibrator project was listed as the national “863” program. The Eastern Geophysical Exploration brings together elites to attack. In the end, the lowest frequency of the low-frequency source independently developed by Oriental Geophysical Exploration is 3 Hz, and the low-frequency seismic signal that can be received reaches 1.5 Hz. It was put into industrial production in 2013.

This technology can greatly improve the bandwidth of seismic waves, is conducive to high-precision imaging, and is conducive to the direct use of seismic waves for accurate inversion of the properties of the target. The application effect of more than 80 projects at home and abroad shows that this technology has achieved good geological effects in solving the geological target imaging under the salt, deep desert hinterland and coal seam and igneous rock zone, greatly improving the oil. The accuracy of the Tibetan property prediction technology; highly recognized by the oilfield company, and promoted the advancement of geophysical technology.

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