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Growth characteristics of Changhsingian (Late Permian) carbonate platform margin reef complexes in Yuanba Gas Field, northeastern Sichuan Basin, China
Author(s) -
Chen Lei,
Lu YongChao,
Guo TongLou,
Deng LiSha
Publication year - 2012
Publication title -
geological journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.721
H-Index - 54
eISSN - 1099-1034
pISSN - 0072-1050
DOI - 10.1002/gj.2463
Subject(s) - reef , geology , facies , permian , paleontology , natural gas field , natural gas , carbonate platform , sichuan basin , carbonate , tarim basin , structural basin , margin (machine learning) , oceanography , geochemistry , chemistry , materials science , organic chemistry , metallurgy , machine learning , computer science
The Yuanba Gas Field is the second largest natural gas reservoir in the Sichuan Basin, SW China. The vast majority of natural gas reserve is embedded in the Changhsingian platform marginal reef complexes. Integration of facies analysis, well‐seismic calibration, well logs, seismic profiles, and RMS attribute allows reconstruction of the reef complex structure, and five growth cycles of overlapping accretionary reefs are recognized. The carbonate platform margin reef complex comprises reef core, fore reef and back reef facies associations. The retrograding–prograding growth pattern and northwesterly migrating trends of overlapping accretionary reefs were likely controlled by short‐term sea‐level changes superimposed by local currents prevailing in the eastern Palaeotethyan Ocean. Copyright © 2012 John Wiley & Sons, Ltd.