In the Spring Festival of 2020, the people of the whole country worked together to prevent and fight the epidemic. At present, the spread of local epidemic in Wuhan as the main battlefield has been basically blocked, and it is believed that many years later, you will still be unforgettable. In March 2020, the epidemic spread rapidly outside the country, the United States has four consecutive circuit breakers, the collapse of international oil prices and oil companies have said to cut capital expenditure, so you are deeply impressed by the awe of the oil people Winter has come.
The year 2020 is treacherous, but as a geophysicist, no matter how difficult the situation is, we will stick to "I offer oil for our country".
Before that, we shared some experience on land seismic data processing. Compared with land data, ocean data has no complex near surface problem, relatively weak absorption and attenuation, and often has relatively good signal-to-noise ratio. However, the unique ghost wave and sea related multiple wave of ocean data bring difficulties to ocean data processing. In China, there are fewer researchers engaged in marine data processing than on land. Objectively speaking, their technical development should also be relatively behind the international advanced level. Therefore, at the beginning of the company's establishment, the in-depth exploration of marine seismic data processing technology was regarded as an important research direction of the company's development.
Recently, I reviewed 16 marine data that we have done in order to verify the application effect of the technology in the past three years, including broadband ghost wave removal, 2D shallow water multiple removal, 3D shallow water MWD multiple removal, 3D SRME, curved wave domain reduction, ISS multiple removal, deblending, CRS, Q depth migration, beam depth migration, RTM migration, fault control tomographic inversion and FWI Model update, etc. These technical sequences are complete and comprehensive in terms of content, hard-working in terms of team business and solid and effective in terms of processing effect. Here is a review:
Figure 1 processing effect of wide-band ghost wave elimination method
Fig. 2 shallow water broadband amplitude preserving reprocessing effect
Figure 3 Comparison of SWD / SRME multiple suppression methods in shallow water
Fig. 4 Effect of mwd-srme-tpdecon multiple suppression method in ultra shallow water
Fig. 5 Effect of multiple wave suppression method in gas cloud area
Fig. 6 Effect of curved wave domain subtraction method
Figure 7 Effect of CRS stacking method of common reflection surface elements
Figure 8 Effect of single gun separation technology for random source acquisition
Figure 9 Effect of continuous acquisition single gun separation technology
Figure 10 imaging effect of buried hill depth domain
Figure 11 effect of gas cloud migration method
Figure 12 update effect of FWI speed by full waveform inversion
Just as no one would have expected the new crown epidemic at the beginning of 2020 to press the emergency stop button for China, unexpected things will happen, so we should be more awed and more active! Looking back on the past and looking forward to the future, in 2020, we will have firm confidence and be more proactive in the crisis so that more people can understand us. Time will always go from cold to spring!