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- W2018250039 abstract "Introduction of small or large quantities of hydrocarbons into a porous low impedance reservoir has been known for some time to produce an amplitude increase with moderate offset. This direct hydrocarbon indicator signature has been successfully exploited for some time. The drawback of this indicator is its inability to clearly distinguish between fully and partially saturated reservoirs. What will be highlighted in this paper is a robust direct hydrocarbon indicator, the “AVO rollover,” which is sensitive to hydrocarbon saturation. Unlike the traditional amplitude increase with offset, the rollover shows itself at large rather than intermediate offset. A number of Gulf of Mexico examples will be provided to illustrate the effect. Statistics indicating the widespread nature of this effect will also be provided. Further, the physical basis for this effect and why it is sensitive to saturation will be shown using both interface and 1-d modeling. Non-low impedance reservoirs also exhibit a specific AVO rollover signature, but the focus of this paper will be on the low impedance case." @default.
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- W2018250039 date "2001-01-01" @default.
- W2018250039 modified "2023-09-25" @default.
- W2018250039 title "AVO rollover: A saturation sensitive direct hydrocarbon indicator" @default.
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- W2018250039 doi "https://doi.org/10.1190/1.1816581" @default.
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