四川盆地寒武系储层特征及优质储层形成机理

doi:10.11743/ogg20090506

Abstract

Abstract:

Based on core observation,thin section identification,geochemical analysis and analysis of inside geode fluid-filling sequence,this paper tries to discuss the formation mechanism of the high quality Cambrian reservoirs in Sichuan Basin.The following results are obtained:shoal facies tract is the foundation of high quality reservoir;gypsum dissolution,fresh-water karstification and meteoric water filtration and dissolution at the early diagenetic stage are the chief mechanisms of the pre-existing vugs in the Cambrian;dissolution of extraneous corrosive fluids in the process of deep burial is the persistent driving force of enlargement of the pre-existing vugs and the formation of new vugs;favorable tectonic position and weak fluid reaction are the prerequisite to the preservation of the pre-existing vugs.

Key words: high quality reservoir, formation mechanism, Cambrian, Sichuan Basin

CLC Number:

TE122.2

Huang Wenming, Liu Shugen, Zhang Changjun, Wang Guozhi, Xu Guosheng, Yong Ziquan, Ma Wenxin. Reservoir characteristics and formation mechanism of the high quality Cambrian reservoirs in Sichuan Basin[J]. Oil & Gas Geology, 2009, 30(5): 566-575.

References

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Reservoir characteristics and formation mechanism of the high quality Cambrian reservoirs in Sichuan Basin

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