f Analysis of the seismic response from thin calcite cemented layers

Calcite cemented sandstone layers are common in reservoirs deposited in shallow marine environments. The thickness of these layers are typically from 0.1 to 5 meters. Their lateral extent can range from small nodules to several kilometers, and the laterally continuous layers are potential reservoir barriers. Field analogue data indicate that the more continuous cemented zones are related to sequence stratigraphic boundaries, and that they occur in a network around these boundaries. Mahradi (1983) found that the reflected zero-offset amplitude from closely spaced thin layers was linearly related to the totsl amount of the thin layer material in the stack. The objective of this paper is to quantify such a relationship for stacks of calcite cemented layers and further, to estimate the amount of calcite cementation from synthetic and real seismic data.