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- W2187366613 abstract "Summary Exploration risk assessment in frontier basins is generally based on regional geologic information in combination with prospect scale seismic interpretation and mapping. In a frontier basin offshore West Greenland EnCana Corporation and partners were challenged with prioritizing a drilling program by selecting from a portfolio of fourteen seismically mapped prospects on two exploration blocks. Lacking sufficient geologic information, reliance on unconventional geophysical methods to further the prospects to drillable locations was a necessity. Resistivity well logging methods measure responses of electromagnetic fields to determine resistivity of the host rock. Modern logging tools resolve resistivity on scales of centimeters vertically and horizontally within metres from the wellbore. Marine controlled source electromagnetic surveying (CSEM) uses similar physical principles but with a stronger electric field source located near the sea floor and with large areal sampling of the electric and magnetic field responses. From these measurements 3D CSEM inversion provides details of subsurface resistivity at scales typical of prospects and oil/gas fields. CSEM derived resistivity information offers additional geologic understanding to better assess pre-drill risk in exploration programs. This paper summarizes the use of CSEM data acquired and processed by WesternGeco-Geosystem and the 3D CSEM inversion results used by EnCana in the risk assessment of frontier exploration prospects offshore West Greenland. CSEM was used successfully to risk hydrocarbon presence before drilling and allowed prioritization of the “best” drilling candidates from the portfolio." @default.
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- W2187366613 date "2009-01-01" @default.
- W2187366613 modified "2023-09-27" @default.
- W2187366613 title "Hydrocarbon Charge Risk Assessment using 3D CSEM Inversion Derived Resistivity in a Frontier Basin, Offshore West Greenland" @default.
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