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U.S.A., The use of the Time Lapse, or 4D, seismic technology is well established in the marine offshore seismic environment, this technology is not so well established yet in the land seismic environmentThe effectiveness of 4D seismic surveys for monitoring production-induced effects in the reservoir is determined by the magnitude of the change in seismic response and by the repeatability of the seismic experiments over the time periods.KOC has recognized the significance and potential of 4D seismic as a powerful and cost effective tool for reservoir management. KOC also comprehends the need to test and evaluate all available, and the emerging, technologies to make 4D successful. In this paper we review several 4D examples, with emphasize on a repeatability study onshore conducted in North Kuwait and a 4D reservoir study performed in Minagish field; West Kuwait.