--> Integrated Prospect Evaluation Using Electromagnetic, Seismic, Petrophysical, Basin Modeling, and Reservoir Engineering Data, by Elizabeth Lorenzetti Harvey, Odd-Petter Skogly, Tracy Burke, and Luiz Amado; #90052 (2006)
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Integrated Prospect Evaluation Using Electromagnetic, Seismic, Petrophysical, Basin Previous HitModelingNext Hit, and Reservoir Engineering Previous HitDataNext Hit

Elizabeth Lorenzetti Harvey, Odd-Petter Skogly, Tracy Burke, and Luiz Amado
Shell International Exploration and Production Inc, Houston, TX

A deepwater prospect in the Campos Basin, Brazil, was evaluated using a combination of geophysical and geological technologies including controlled-source electromagnetic Previous HitdataNext Hit, seismic amplitude-vs.-offset and Previous HitinversionNext Hit Previous HitdataNext Hit, basin- and prospect-scale Previous HitmodelingNext Hit of hydrocarbon generation and migration, and petrophysical input to reservoir engineering models. The integration of these disciplines produced a consistent story for the prospect that reduced the uncertainty of the interpretation. Key uncertainties were the presence of reservoir and the presence, quality, and producibility of hydrocarbons. Many of the analyses, considered alone, were inconclusive or highly uncertain. Combining the analyses increased confidence in the interpretation, and several scenarios were dropped. For example, seismic forward Previous HitmodelingNext Hit results using petrophysical trend Previous HitdataNext Hit were ambiguous regarding the presence of reservoir and hydrocarbons. Reservoir engineering and offset well Previous HitdataNext Hit suggested a likelihood of heavy oil with a seismic response similar to brine. Seismic AVO analysis indicated a weak response at the crest of the structure. Seismic Previous HitinversionNext Hit results supported the presence of reservoir, but indicated a wet response in all but the most crestal areas of the prospect. Prospect-specific basin Previous HitmodelingNext Hit indicated that hydrocarbon migration into the prospect was unlikely, although an oil discovery was located only a few kilometers away. Electromagnetic Previous HitdataNext Hit were acquired over the prospect and showed a negative response. This result was used to downgrade scenarios that could not be discounted with other Previous HitdataNext Hit types. The integration of these Previous HitdataNext Hit and Previous HitmethodsTop has served to downgrade a prospect that has been in the exploration portfolio inventory for five years.