Study on high-resolution sequence stratigraphy and sedimentary system of middle-deepbeds on western slope, Nanpu sag

doi:10.3969/j.issn.1672-7703.2017.05.008

Abstract

Abstract: Four third-order sequence boundaries are identified and three third-order sequences(SQ7, SQ8, SQ9) are divided by high-resolution sequence stratigraphy theory and method, new seismic data processing and interpretation combined with lithological-electrical response characteristics. Stratigraphic units of twelve fourth-order sequences or systems tracts are divided by therelatively stable transgressive surfaces and abrupt changes of lithology in the third-order sequences as the boundaries. Core facies and electrofacies are systematically analyzed and two sedimentary systems (fan delta and lacustrine) are identified based on provenance research in this study area. Moreover, the planar distribution law of each sedimentary system in high-resolution sequence stratigraphy framework is studied. Hereinto,the fan delta plain range is smaller near northern provenance entrance of the study area, but the fan delta front subfacies range is wider in the central part of the study area.

Key words: systems tract, high-resolution sequence stratigraphic framework, fan delta sedimentary system, lacustrine sedimentary system, western slope of Nanpu sag

CLC Number:

TE111.3

Xia Jingsheng, Liu Xiao, Li Wenhua, Zhang Boming, Wen Wen, Li He, Fan Rong, Xue Lin. Study on high-resolution sequence stratigraphy and sedimentary system of middle-deepbeds on western slope, Nanpu sag[J]. China Petroleum Exploration, 2017, 22(5): 72-81.

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