Digital surveys of the T block in China's Daqing oil field began in 1988, and the first high-resolution seismic survey in the area was conducted from the winter of 1998 to the spring of 1999. These 2D seismic data sets of 1988 and 1999 have been used in a time-lapse seismic reservoir monitoring study. Figure 1 shows the quality of the seismic data is good, and three events can be clearly seen in the seismic profiles.

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