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Peter A Craig - One of the best experts on this subject based on the ideXlab platform.
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classification lithologic calibration and stratigraphic succession of seismic Facies of intraslope basins deep water gulf of mexico
AAPG Bulletin, 1998Co-Authors: Bradford E Prather, James R Booth, Gary S Steffens, Peter A CraigAbstract:Seismic Facies in Gulf of Mexico intraslope basins reflect the interplay of a variety of deep-water depositional processes and the evolution of accommodation space on the slope. This interplay of processes results in a transition from an early, sand-prone ponded basin-fill succession (ponded Facies assemblage) to a later shale-prone, slope-bypass succession (bypass Facies assemblage). Convergent-baselapping Facies in combination with localized chaotic and draping Facies dominate the ponded Facies assemblage. Stratigraphic relationships among these three units illustrate how fill-and-spill depositional processes occur within ponded-basin accommodation space. Convergent-thinning Facies with widespread chaotic and draping Facies dominate the bypass Facies assemblage. These units represent filling of different types of slope accommodation space. The transition from ponded to bypass Facies assemblages can be sharp or gradational over hundreds of meters. Transitions occured across the central Gulf of Mexico during the late Pliocene between 2.0 and 1.8 Ma, and in the early Pleistocene between 1.2 and 1.0 Ma. Nearly synchronous transitions throughout basins in the upper to middle slope suggest that increased sediment supply, resulting from a second-order sea level fall, and capture of large drainage areas by the Mississippi River during the Pleistocene are the primary controls on development of this large-scale stratigraphic architecture.
Bradford E Prather - One of the best experts on this subject based on the ideXlab platform.
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classification lithologic calibration and stratigraphic succession of seismic Facies of intraslope basins deep water gulf of mexico
AAPG Bulletin, 1998Co-Authors: Bradford E Prather, James R Booth, Gary S Steffens, Peter A CraigAbstract:Seismic Facies in Gulf of Mexico intraslope basins reflect the interplay of a variety of deep-water depositional processes and the evolution of accommodation space on the slope. This interplay of processes results in a transition from an early, sand-prone ponded basin-fill succession (ponded Facies assemblage) to a later shale-prone, slope-bypass succession (bypass Facies assemblage). Convergent-baselapping Facies in combination with localized chaotic and draping Facies dominate the ponded Facies assemblage. Stratigraphic relationships among these three units illustrate how fill-and-spill depositional processes occur within ponded-basin accommodation space. Convergent-thinning Facies with widespread chaotic and draping Facies dominate the bypass Facies assemblage. These units represent filling of different types of slope accommodation space. The transition from ponded to bypass Facies assemblages can be sharp or gradational over hundreds of meters. Transitions occured across the central Gulf of Mexico during the late Pliocene between 2.0 and 1.8 Ma, and in the early Pleistocene between 1.2 and 1.0 Ma. Nearly synchronous transitions throughout basins in the upper to middle slope suggest that increased sediment supply, resulting from a second-order sea level fall, and capture of large drainage areas by the Mississippi River during the Pleistocene are the primary controls on development of this large-scale stratigraphic architecture.
Shuyuan Yang - One of the best experts on this subject based on the ideXlab platform.
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Reservoir diagenetic Facies of the Upper Triassic Xujiahe Formation in the central Sichuan Basin
Shiyou Xuebao Acta Petrolei Sinica, 2011Co-Authors: Xiangxiang Zhang, Shizhen Tao, Rukai Zhu, Caineng Zou, Shuyuan YangAbstract:Based on data of cast-slice, cathodeluminescence and SEM analyses data, the present paper comprehensively investigated types and characteristics of reservoir diagenesis of the Upper Triassic Xujiahe Formation in the central Sichuan Basin, distinguished types of diagenetic Facies, discussed logging curve features of diagenetic Facies, and examined vertical and lateral distributions of diagenetic Facies. The results demonstrated that clastic reservoirs of the Xujiahe Formation in the studied area experienced destructive diagenesis by compaction, siliceous cementation, carbonate cementation and constructive diagenesis by denudation, chlorite cementation. The reservoirs could be divided into five types of diagenetic Facies, including low porosity particularly low permeability corroded Facies, particularly low porosity extremely low permeability compacted-corroded Facies, intensively compacted tight Facies, siliceous cemented tight Facies and calcite cemented tight Facies. Of which the two former Facies occurred mainly in lower parts of the second, forth and sixth members of the Xujiahe Formation, while the rest three Facies vertically and laterally isolated other favorable diagenetic Facies, forming lithologic traps. Horizontally, reservoirs of the Xujiahe Formation of the central Sichuan Basin could be divided into three areas according to different diagenetic Facies, such as low porosity particularly low permeability corroded Facies, particularly low porosity extremely low permeability compacted-corroded Facies and intensively compacted tight Facies.
Cnooc Lt - One of the best experts on this subject based on the ideXlab platform.
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Seismic Facies Characteristics and Sedimentary Facies Evolution of Wenchang Formation in Transfer Zone of Fault A in Huizhou Sag
2014Co-Authors: Cnooc LtAbstract:Huizhou sag locates in the middle of northern depression belt of the Pearl River Mouth Basin,which is one of the richest hydrocarbon-bearing depressions in eastern South China Sea.It ′s difficult to make plane research of the sedimentary Facies through single well Facies only for low exploration degree and few drilling information in the Wenchang formation of Huizhou sag.By analyzing and contrasting the 3D seismic section, the Wenchang formation can be divided into SQ1-SQ4 four seismic sequences in transfer zone of fault A of Huizhou sag.After the research of the seismic Facies of the transfer zone of fault A,wedge-shaped seismic Facies,foreset seismic Facies,sill-like parallel-subparallel seismic Facies and lens seismic Facies are identified on the seismic sections.And the distribution range of the seismic Facies on the plane is known.Based on the thorough research of the sedimentary Facies in every sequence of Wenchang formation drilled by single well, the seismic Facies may be inverted to sedimentary Facies under the regional geological background.Distribution and evolution characteristics of the sedimentary Facies in sequences of Wenchang formation are analyzed.It is found out that the sedimentary Facies includes braided river delta,fan delta,shore-shallow lake and semideep-deep lake Facies,among them the braided river delta is the most important sedimentary Facies in this area.
Niu Sheng-li - One of the best experts on this subject based on the ideXlab platform.
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Seismic Facies Characteristics and Sedimentary Facies Analysis of NA Oil Formation in Wenchang Formation of Wellblock A in Huizhou Depression
Journal of Oil and Gas Technology, 2020Co-Authors: Niu Sheng-liAbstract:The Paleogene Wenchang Formation of Huizhou Sag was at the early exploration stage,there were little drilling data.By analyzing the lithology and core sedimentary structure from Well A-1 in Wellblock A,it was proven that braided river delta deposits were mainly developed in the well.On the basis stated,it is found out that the seismic Facies includes wedge-shaped seismic Facies,parallel-subparallel seismic Facies,foreset seismic Facies and concave filling seismic Facies.The sedimentary Facies include braided river delta plain sub-Facies,braided river delta front sub-Facies,fan delta Facies,shallow lake and shore Facies.It provides a solid base for the seismic exploration of the Paleogene Wenchang Formation in the area.
