SEISMIC LOW-FREQUENCY EFFECTS IN MONITORING FLUID-SATURATED RESERVOIRS
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dc.contributor.author | Korneev V.A. | |
dc.contributor.author | Daley T.M. | |
dc.contributor.author | Silin D.B. | |
dc.contributor.author | Goloshubin G.M. | |
dc.date.accessioned | 2022-09-20T02:53:33Z | |
dc.date.available | 2022-09-20T02:53:33Z | |
dc.date.issued | 2004 | |
dc.identifier | https://elibrary.ru/item.asp?id=47586761 | |
dc.identifier.citation | Geophysics, 2004, 69, 2, 522-532 | |
dc.identifier.issn | 0016-8033 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/38629 | |
dc.description.abstract | There is a complex relationship between seismic attributes, including the frequency dependence of reflections and fluid saturation in a reservoir. Observations in both laboratory and field data indicate that reflections from a fluid-saturated layer have an increased amplitude and delayed traveltime at low frequencies, when compared with reflections from a gas-saturated layer. Comparison of laboratory-modeling results with a diffusive-viscous-theory model show that low (<5) values of the quality factor Q can explain the observations of frequency dependence. At the field scale, conventional processing of time-lapse VSP data found minimal changes in seismic response of a gas-storage reservoir when the reservoir fluid changed from gas to water. Low-frequency analysis found significant seismic-reflection-attribute variation in the range of 15-50 Hz. The field observations agree with effects seen in laboratory data and predicted by the diffusive-viscous theory. One explanation is that very low values of Q are the result of internal diffusive losses caused by fluid flow. This explanation needs further theoretical investigation. The frequency-dependent amplitude and phase-reflection properties presented in this paper can be used for detecting and monitoring fluid-saturated layers. | |
dc.title | SEISMIC LOW-FREQUENCY EFFECTS IN MONITORING FLUID-SATURATED RESERVOIRS | |
dc.type | Статья |
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