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ZHANG WenBiao, LIU ZhiQiang, CHEN ZhiHai, XU HuaMing, LIN Yu, WANG JingWei. Establishment and Application of Geological Data Base on Deep-water Channels in Angola Block[J]. Acta Sedimentologica Sinica, 2015, 33(1): 142-152. doi: 10.14027/j.cnki.cjxb.2015.01.015
Citation: ZHANG WenBiao, LIU ZhiQiang, CHEN ZhiHai, XU HuaMing, LIN Yu, WANG JingWei. Establishment and Application of Geological Data Base on Deep-water Channels in Angola Block[J]. Acta Sedimentologica Sinica, 2015, 33(1): 142-152. doi: 10.14027/j.cnki.cjxb.2015.01.015

Establishment and Application of Geological Data Base on Deep-water Channels in Angola Block

doi: 10.14027/j.cnki.cjxb.2015.01.015
  • Received Date: 2014-03-07
  • Rev Recd Date: 2014-05-12
  • Publish Date: 2015-02-10
  • To establish a quantitative geologic database at composite and single channel level for deep water slope channel systems in Angola, the characteristics and their quantitative relationships were carefully studied based on high frequency 3D seismic profile, slice and attribute data of shallow Pliocene deposits. The results indicate that the single channel activity pattern is somewhat similar to the point bar model in a meandering river. It migrates only in lateral direction (orthogonal to the paleocurrent direction) without "downstream sweep" component, and the lateral accretion composites form a "concentric half ring" shape in plane view, whereas the sandbodies fill in the axis by vertical accretion, and thinning towards channel edge. Good positive correlations can be widely observed between width and depth, meander-arc height and sinuosity in single channels. Based on the single channel activity pattern, the composite channel pattern can be classified into 3 types as (Ⅰ) lateral migration, (Ⅱ) inclined migration, and (Ⅲ) swing migration. Type (Ⅰ) develops in higher sinuosity section (sinuosity>1.3), whereas type (Ⅱ) and type (Ⅲ) develops mainly in lower sinuosity section (1
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  • Received:  2014-03-07
  • Revised:  2014-05-12
  • Published:  2015-02-10

Establishment and Application of Geological Data Base on Deep-water Channels in Angola Block

doi: 10.14027/j.cnki.cjxb.2015.01.015

Abstract: To establish a quantitative geologic database at composite and single channel level for deep water slope channel systems in Angola, the characteristics and their quantitative relationships were carefully studied based on high frequency 3D seismic profile, slice and attribute data of shallow Pliocene deposits. The results indicate that the single channel activity pattern is somewhat similar to the point bar model in a meandering river. It migrates only in lateral direction (orthogonal to the paleocurrent direction) without "downstream sweep" component, and the lateral accretion composites form a "concentric half ring" shape in plane view, whereas the sandbodies fill in the axis by vertical accretion, and thinning towards channel edge. Good positive correlations can be widely observed between width and depth, meander-arc height and sinuosity in single channels. Based on the single channel activity pattern, the composite channel pattern can be classified into 3 types as (Ⅰ) lateral migration, (Ⅱ) inclined migration, and (Ⅲ) swing migration. Type (Ⅰ) develops in higher sinuosity section (sinuosity>1.3), whereas type (Ⅱ) and type (Ⅲ) develops mainly in lower sinuosity section (1

ZHANG WenBiao, LIU ZhiQiang, CHEN ZhiHai, XU HuaMing, LIN Yu, WANG JingWei. Establishment and Application of Geological Data Base on Deep-water Channels in Angola Block[J]. Acta Sedimentologica Sinica, 2015, 33(1): 142-152. doi: 10.14027/j.cnki.cjxb.2015.01.015
Citation: ZHANG WenBiao, LIU ZhiQiang, CHEN ZhiHai, XU HuaMing, LIN Yu, WANG JingWei. Establishment and Application of Geological Data Base on Deep-water Channels in Angola Block[J]. Acta Sedimentologica Sinica, 2015, 33(1): 142-152. doi: 10.14027/j.cnki.cjxb.2015.01.015
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