Systems Tracts, Seismic Facies, and Attribute Analysis Within a Sequence-Stratigraphic Framework—Example from the Offshore Louisiana Gulf Coast

Pacht, Jory A.; Bowen, Bruce E.; Shaffer, Bernard L.; Pottorf, William R.

doi:10.1007/978-1-4757-0160-9_2

Cited by 4 publications

(2 citation statements)

References 24 publications

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“…They typically represent well-sorted, far-travelled sediments resting above a sequence boundary, and are attractive hydrocarbon reservoirs because of their high sand content, thick-bedded nature, well-sorted character, and wide aerial extent. In contrast, slope fan sandstones typically display erosional truncation of beds and channelisation, may be thinner bedded, and are confined in a spatial sense to base of slope cone-like morphologies, with constituent channels and adjoining levee deposits (Vail 1987;Pacht et al 1992). Slope fans are more common of the later phases of lowstand deposition when base level begins to rise, a time when the major supply of continent-derived sediment has waned .…”

Section: Introductionmentioning

confidence: 99%

Grain‐size characteristics for distinguishing basin floor fan and slope fan depositional settings: Outcrop and subsurface examples from the late Miocene Mount Messenger Formation, New Zealand

Browne¹,

King

Higgs

et al. 2005

New Zealand Journal of Geology and Geophysics

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Outcrop data indicate that basin floor fan sandstones are relatively sand rich in comparison to silt-rich slope fan sandstones. Both basin floor and slope fan sandstones show better sorting with increasing grain size, though cross-plots show the nature of this relationship differs slightly for basin floor and slope fan samples. These relationships appear to hold for both outcrop and subsurface sandstone samples from the formation. This finding is unexpected given the c. 600 m stratigraphic thickness of the formation, representing several million years of depositional history, and implies a uniform sediment texture was supplied to the basin through time.The differentiation of basin floor fan and slope fan deposits is significant especially in subsurface settings involving petroleum well data. Hydrocarbon exploration strategies will vary markedly for basin floor fan versus slope fan reservoirs, making such differentiation of lithofacies types important to optimise hydrocarbon discovery. With subsurface data, the interpretation of these two reservoir sandstone lithofacies is often difficult to make. The grain-size changes appear to mimic the contrasting depositional mechanisms operative in these two deep-water settings.

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Section: Introductionmentioning

confidence: 99%

Grain‐size characteristics for distinguishing basin floor fan and slope fan depositional settings: Outcrop and subsurface examples from the late Miocene Mount Messenger Formation, New Zealand

Browne¹,

King

Higgs

et al. 2005

New Zealand Journal of Geology and Geophysics

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“…Many researchers have described the use of dipmeter in interpretations of structural dip, depositional environments, and fracture orientations (e. g. Gilreath, 1987;Adam et al, 1987;Brenson, 1991;Pacht et al , 1992;Bischke, 1994 In this study cumulative dip plot method (Hurley, 1994) was used in recognizing faults, unconformities and sequence boundaries (sedimentary cycles). The technique involves cross plotting cumulative bedding-plane dip against either depth or an arbitrary bedding-plane number that is a function of depth.…”

Section: Cumulative Dip Plotsmentioning

confidence: 99%

Cumulative dip plot method

Sadikun¹

1997

BGSM

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It is usual for a well to encounter faults, unconformities and sequence boundaries along its depth. Identification of these features based on the scatter of the 'tadpoles' from the diplog data alone may be difficult. To assist this identification, a cumulative dip plot, a crossplot of bedding plane orientation against depth was used. This method involves plotting the cumulative bedding plane dip with their appropriate dip directions against depth. The dip directions were colour coded into four compass quadrants: northeast (0-90°), east-south (90-180°), southwest (180-270°) and west-north (270-360°). A simple layer cake bedding will produce a straight line and a single colour cumulative plot. It is usual for bedding dips magnitude and directions or both to change when passing through a fault or unconformity, and thus will be represented by points of inflection (discontinuity and perhaps change of colours). In this study, diplog data from two wells

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Seismic facies analysis: Past, present and future

Haq

2022

Earth-Science Reviews

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Systems Tracts, Seismic Facies, and Attribute Analysis Within a Sequence-Stratigraphic Framework—Example from the Offshore Louisiana Gulf Coast

Cited by 4 publications

References 24 publications

Grain‐size characteristics for distinguishing basin floor fan and slope fan depositional settings: Outcrop and subsurface examples from the late Miocene Mount Messenger Formation, New Zealand

Grain‐size characteristics for distinguishing basin floor fan and slope fan depositional settings: Outcrop and subsurface examples from the late Miocene Mount Messenger Formation, New Zealand

Cumulative dip plot method

Seismic facies analysis: Past, present and future

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