ABSTRACT

This paper introduces what's the problem with onshore time-lapse seismic and discusses how to deal with the problem, and then shows a successful land example of Western China. The study indicates that it is difficult to overcome the non-repeatability effects only by using cross-equalization and shows that it has to be using the specially designed processing techniques to deal with the non-repeatability effect. The specially designed processing techniques can enhance repeatable account of space-varying influence from the near surface and the non-repeatability factors of time-lapse seismic acquisition on land, and can obtain the image of relative preservation of amplitude, frequency, phase, waveform, and further improving resolution for the reservoir. With further integration with dynamic information, remaining oil in the reservoir can be described with the reprocessed time lapse seismic data.

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