Effect of Diagenesis on Reservoir Distribution in a Sequence Strati-graphic Framework: Evidence from the Feixianguan Formation (Triassic) in Tieshan District of Northeastern Sichuan, China

DOI

10.2991/icseee-15.2016.213How to use a DOI?

Keywords

Sequence stratigraphy; carbonate diagenesis; dolomitization; reservoir distribution

Abstract

By integrating diagenesis and sequence stratigraphy, the effect of sedimentary-diagenetic reformation on reservoir quality and distribution was investigated with in a sequence stratigraphic framework. Based on the petrological characteristics, sedimentary microfacies and logs analysis, 2 third-order sequences and 5 system tracts are distinguished in the Feixianguan Formation, as well as a stratigraphic framework has been established. Besides, the diagenetic processes of Feixianguan Formation contain compaction, pressure-solution, cementation, dolomitization and dissolution. A analysis reveals that cementation is the major cause of porosity-loss for primary and secondary po-rosity. Contrary to the adverse impact of cementation on reservoir space, polygenetic dolomitization and dissolution greatly improve the carbonate rocks reservoir and permeability. Sequence strati-graphic framework constrains the distribution of diagenesis, which result that dolomitization is most evident in transgressive system tract (TST) and below maximum flooding surfaces (MFS) in Sq1, and locally occur in lower part of the highstand system tract (HST). And it is also proved that the dolomitic reservoir shows high porosity in TST of Sq1 and moderate quality in HST of Sq1.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yuan Huang
AU  - Mingguang Liao
AU  - Xiaodie Hu
PY  - 2016/04
DA  - 2016/04
TI  - Effect of Diagenesis on Reservoir Distribution in a Sequence Strati-graphic Framework: Evidence from the Feixianguan Formation (Triassic) in Tieshan District of Northeastern Sichuan, China
BT  - Proceedings of the 2015 4th International Conference on Sustainable Energy and Environmental Engineering
PB  - Atlantis Press
SP  - 1200
EP  - 1207
SN  - 2352-5401
UR  - https://doi.org/10.2991/icseee-15.2016.213
DO  - 10.2991/icseee-15.2016.213
ID  - Huang2016/04
ER  -