Changes

The term deep water has been used in two different ways. It applies in a geological context to deep-water systems that have been transported by [[gravity]] flow processes in a marine setting.<ref name=WeimerandSlatt>Weimer, P., and R. M. Slatt, 2004, Petroleum systems of deep-water settings: SEG/EAGE (Society of Exploration Geophysicists/European Association of Geoscientists and Engineers) Distinguished Instructor Series 7, 465 p.</ref> Deep water is also defined as present-day sea depths in excess of 500 m (1640 ft) deep.

The term deep water has been used in two different ways. It applies in a geological context to deep-water systems that have been transported by [[gravity]] flow processes in a marine setting.<ref name=WeimerandSlatt>Weimer, P., and R. M. Slatt, 2004, Petroleum systems of deep-water settings: SEG/EAGE (Society of Exploration Geophysicists/European Association of Geoscientists and Engineers) Distinguished Instructor Series 7, 465 p.</ref> Deep water is also defined as present-day sea depths in excess of 500 m (1640 ft) deep.

Since 1984 there has been an intensive effort in exploring for reservoirs located in present-day deep water with numerous prolific discoveries.<ref>Pettingill, H. S., and P. Weimer, 2001, Global deep-water exploration: Past, present and future frontiers, in R. H. Fillon, N. C. Rosen, P. Weimer, A. Lowrie, H. W. Pettingill, R. L. Phair, H. H. Roberts, and B. Van Hoorn, eds., Petroleum systems of deep-water basins: Global and Gulf of Mexico experience: GCS-SEPM Foundation, p. 1–22.</ref> Deep-water exploration in the Gulf of Mexico, Brazil, and west Africa is targeting and finding a large number of hydrocarbon pools in deep-water marine-sand systems. Only about 20% of these reservoirs had been developed to 2004.<ref name=WeimerandSlatt />

Since 1984 there has been an intensive effort in exploring for reservoirs located in present-day deep water with numerous prolific discoveries.<ref>Pettingill, H. S., and P. Weimer, 2001, Global deep-water exploration: Past, present and future frontiers, in R. H. Fillon, N. C. Rosen, P. Weimer, A. Lowrie, H. W. Pettingill, R. L. Phair, H. H. Roberts, and B. Van Hoorn, eds., Petroleum systems of deep-water basins: Global and Gulf of Mexico experience: GCS-SEPM Foundation, p. 1–22.</ref> Deep-water exploration in the [[Gulf of Mexico]], Brazil, and west Africa is targeting and finding a large number of hydrocarbon pools in deep-water marine-sand systems. Only about 20% of these reservoirs had been developed to 2004.<ref name=WeimerandSlatt />

==Deep-water marine reservoirs can be prolific reservoirs==

==Deep-water marine reservoirs can be prolific reservoirs==

| Widespread amalgamation of channel-fill sandstones in channelized systems || Creates laterally and vertically connected high-volume reservoirs ||  

| Widespread amalgamation of channel-fill sandstones in channelized systems || Creates laterally and vertically connected high-volume reservoirs ||  

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| Shale drapes or late-stage channel-fill shales common in channel-fill sandstones || || Reduces vertical and lateral connectivity between individual channel-fill sandstones

| Shale drapes or late-stage channel-fill shales common in channel-fill sandstones || || Reduces vertical and [[lateral]] connectivity between individual channel-fill sandstones

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| Preferential water ingress along channel axes || || Banked oil may form along channel margins

| Preferential water ingress along channel axes || || Banked oil may form along channel margins

| Levee sediments in channel-levee complexes are thin bedded but can show reservoir connectivity across a large area || Levee sediments can be a production target in their own right

| Levee sediments in channel-levee complexes are thin bedded but can show reservoir connectivity across a large area || Levee sediments can be a production target in their own right

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| Laterally extensive mudstones commonly form permeability barriers to vertical flow || Encourages edge-water drive and can suppress early water production || Creates hydraulic units; water overrun is common

| Laterally extensive [[mudstones]] commonly form permeability barriers to vertical flow || Encourages edge-water drive and can suppress early water production || Creates hydraulic units; water overrun is common

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| Fill and spill geometries || || Potential to create bypassed oil volumes in cellar oil accumulations

| Fill and spill geometries || || Potential to create bypassed oil volumes in cellar oil accumulations

==References==

==References==

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