NDLI: Primary intergranular pores in oolitic shoal reservoir of lower triassic feixianguan formation, Sichuan Basin, Southwest China: Fundamental for reservoir formation and retention diagenesis

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Primary intergranular pores in oolitic shoal reservoir of lower triassic feixianguan formation, Sichuan Basin, Southwest China: Fundamental for reservoir formation and retention diagenesis

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Journal of Earth Science : Volume 21

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Primary intergranular pores in oolitic shoal reservoir of lower triassic feixianguan formation, Sichuan Basin, Southwest China: Fundamental for reservoir formation and retention diagenesis

Content Provider	Springer Nature Link
Author	Tan, Xiucheng Liu, Hong Li, Ling Luo, Bing Liu, Xiaoguang Mou, Xiaohui Nie, Yong Xi, Wenyan
Copyright Year	2011
Abstract	The Lower Triassic Feixianguan (飞仙关) Formation oolitic shoal reservoir in the Sichuan (四川) basin (Southwest China) is currently an exploration and research highlight in China. The reservoir is widely believed to be formed mainly by burial dissolution and/or dolomitization on the basis of primary intergranular pores. In this study, through a comprehensive geological study on the whole basin, the dissolution and dolomitization are suggested not to be the fundamental factor of reservoir formation and there thus may be a possible new fundamental mechanism—the preservation of primary intergranular pores, i.e., the retention diagenesis. Based on this, a complex and multi-stage reservoir evolution and formation model is proposed. In the model, the depositional environment is the basis of reservoir initial formation. Subsequently, early compaction and shallow burial cementation result in the primary reservoir differentiation. Then, multi-stage burial dissolution alters and adjusts the reservoir. Because the last stage gaseous hydrocarbons have little diagenetic impact, the reservoir is formed finally. Therefore, this study presents a possible new fundamental mechanism and evolution model for the reservoir formation. The results can be applied in the regional reservoir predication and shaping exploration strategies, and provide reference for the study of shoal reservoirs in other areas.
Starting Page	101
Ending Page	114
Page Count	14
File Format	PDF
ISSN	1674487X
Journal	Journal of Earth Science
Volume Number	22
Issue Number	1
e-ISSN	1867111X
Language	English
Publisher	China University of Geosciences
Publisher Date	2011-01-29
Publisher Place	China University of Geosciences
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	carbonate reservoir oolitic shoal intergranular pore retention diagenesis burial dissolution dolomitization Lower Triassic Feixianguan Formation Sichuan basin Geology Geochemistry Computer Applications in Earth Sciences Biogeosciences Applied Earth Sciences Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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