四川盆地东部五百梯地区长兴组礁、滩相储层特征

doi:10.3969/j.issn.1673-8926.2010.02.005

Lithologic Reservoirs ›› 2010, Vol. 22 ›› Issue (2): 24-31.doi: 10.3969/j.issn.1673-8926.2010.02.005

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Characteristics of reef and shoal facies reservoir of Upper Permian Changxing Formation in Wubaiti area，eastern Sichuan Basin

WEN Huaguo¹， ZHENG Rongcai¹， DANG Lurui²， ZHENG Chao²， ZHAO Can¹，WANG Pengfei³

(1．State Key Laboratory ofOil and Gas Reservoir Geology and Exploitation，Chengdu University ofTechnology， Chengdu 610059，China；2．Chongqing Gas District，Southwest Oii andGas Companyof CNPC，Chongqing 400021，China； 3．Yumen oi~ za Company of CNPC，Juquan 735019，China

Online:2010-06-15 Published:2010-06-15

Abstract

Abstract:

The characteristics and genesis of Changxing Formation reservoir in Wubaiti area are studied．The result indicates that intracrystalline pores，intercrystalline solution pores，super large dissolved pores and caves supply the prominent reservoir space．Th e reservoir rocks are mainly grain dolomite，reef dolomite and crystal dolomite．The reservoir property is generally poor and it is attributed into fracture-pore reservoir with low porosity and medium permeability． The development of reservoir of Changxing Formation is generally controlled by microfacies and diagenesis．The reef and shoal facies of the platform edge which developed in the period of sustained transgression controlled the distribution of the reservoir．Reef platform shallows，framework reef and binding reef are favorab le microfacies for reservoir space． Diageneses including dolomitization and dissolution are primarily beneficial to the reservoir quality．Excellent reservoir is always associated th the multistage burial dolomitization，early dissolution，mi ddle dissolution at middle—anadiagenetic stage，late dissolution at anadiagenetic stage and hydrogen sulfuric acid dissolution related with TSR．

Key words: Kirchhof integral method, pre-stack time migration, floating datum, migration aperture, anti-aliasing filter, Qaidam Basin

WEN Huaguo，ZHENG Rongcai，DANG Lurui，ZHENG Chao，ZHAO Can，WANG Pengfei. Characteristics of reef and shoal facies reservoir of Upper Permian Changxing Formation in Wubaiti area，eastern Sichuan Basin[J].Lithologic Reservoirs, 2010, 22(2): 24-31.

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