Primary Intergranular Pores in Oolitic Shoal Reservoir of Lower Triassic Feixianguan Formation, Sichuan Basin, Southwest China: Fundamental for Reservoir Formation and Retention Diagenesis

Xiucheng Tan; Hong Liu; Ling Li; Bing Luo; Xiaoguang Liu; Xiaohui Mou; Yong Nie; Wenyan Xi

doi:10.1007/s12583-011-0160-2

Volume 22 Issue 1

Feb 2011

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Journal of Earth Science > 2011 > 22(1): 101-114.

Xiucheng Tan, Hong Liu, Ling Li, Bing Luo, Xiaoguang Liu, Xiaohui Mou, Yong Nie, Wenyan Xi. Primary Intergranular Pores in Oolitic Shoal Reservoir of Lower Triassic Feixianguan Formation, Sichuan Basin, Southwest China: Fundamental for Reservoir Formation and Retention Diagenesis. Journal of Earth Science, 2011, 22(1): 101-114. doi: 10.1007/s12583-011-0160-2

Citation:

Xiucheng Tan, Hong Liu, Ling Li, Bing Luo, Xiaoguang Liu, Xiaohui Mou, Yong Nie, Wenyan Xi. Primary Intergranular Pores in Oolitic Shoal Reservoir of Lower Triassic Feixianguan Formation, Sichuan Basin, Southwest China: Fundamental for Reservoir Formation and Retention Diagenesis. Journal of Earth Science, 2011, 22(1): 101-114. doi: 10.1007/s12583-011-0160-2

Citation:

Xiucheng Tan, Hong Liu, Ling Li, Bing Luo, Xiaoguang Liu, Xiaohui Mou, Yong Nie, Wenyan Xi. Primary Intergranular Pores in Oolitic Shoal Reservoir of Lower Triassic Feixianguan Formation, Sichuan Basin, Southwest China: Fundamental for Reservoir Formation and Retention Diagenesis. Journal of Earth Science, 2011, 22(1): 101-114. doi: 10.1007/s12583-011-0160-2

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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

doi: 10.1007/s12583-011-0160-2

1.
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation & School of Resource and Environment, Southwest Petroleum University, Chengdu 610500, China
2.
School of Resource and Environment, Southwest Petroleum University, Chengdu 610500, China
3.
Branch of Basin, Institute of Exploration and Development, Liaohe Oilfield Company, PetroChina, Panjin 124010, China

Funds:

the PetroChina Youth Innovation Foundation 06E1018

Key Subject Construction Project of Sichuan Province SZD 0414

More Information

Corresponding author: Xiucheng Tan, tanxiucheng70@163.com
Received Date: 28 Jul 2010
Accepted Date: 25 Oct 2010
Publish Date: 01 Feb 2011

Abstract

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.
- carbonate reservoir,
- oolitic shoal,
- primary intergranular pore,
- retention diagenesis,
- burial dissolution,
- dolomitization,
- Lower Triassic Feixianguan Formation,
- Sichuan basin

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References(53)

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