Bright spots, Dim spots: DHI support in Niger Delta - with Dr. Krzysztof M. (Chris) Wojcik

Direct Hydrocarbon Indicator (DHI) support for hydrocarbons in the Niger Delta has been recognized for several decades. Largely unconsolidated Tertiary shallow marine and deepwater clastics are characterized by strong amplitude response related to hydrocarbon presence. Bright-spot amplitude anomalies have been an attractive exploration target since early 70’. However, even in a well-calibrated basin as the Niger Delta, amplitudes do not always ‘work’. Both false positives, as well as hydrocarbon-bearing reservoirs without any DHI support, are fairly common. The remaining exploration potential in the Niger Delta is still significant thus there is a clear driver to improve our ability to assess the potential for DHI support beyond classic bright-spot plays, as well as to polarize exploration risks to avoid costly failures. This presentation illustrates key issues that seismic interpreters face evaluating classic bright spots and extending bright spot plays into more subtle and risky dim spot plays.

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