鄂西-渝东区长兴组礁滩体发现及相带分布

doi:10.11743/ogg20130309

Abstract

Abstract: Platform margin facies belts surrounding Kaijiang-Liangping continental shelf are favorable for the development of large gas field.The distribution of the continental shelf controls the distribution of reef and shoal facies belts.In order to accurately map the distribution of reef and shoal facies belts,the core,cutting and thin section data were integrated to systematically analyze the grain size,fossil composition and structure types.Moreover,3D seismic data were used to predict the appearance and distribution of the reefs and shoals,and the sedimentary faces in Changxing Formation were mapped by integrating drilling and outcrops data.The nearly NS-trending dome-shaped Jianzhuxi bioherm is of typical platform margin facies.The shoal-facies dolomite at the bottom of the bioherm is large in lateral distribution and its major part is located in the east of the bioherm and is closely interconnected with the platform.The Kaijiang-Liangping continental shelf extends southeastwards across the western part of the Jianzhuxi bioherm and is connected with to West Hubei marine basin.The Jianzhuxi bioherm is located in the same platform margin facies belts with that of the bioherms in Puguang areas.

Key words: sedimentary facies, sedimentary system, platform margin, carbonate rock, Changxing Formation, Western Hubei and Eastern Chongqing area

CLC Number:

TE121.3

Wang Bijn, Zhang Shiwan, Guo Zhanfeng, Chen Miankun, Liu Xinmin. New evidences of reefs,shoals and sedimentary facies of the Changxing Formation in Western Hubei and Eastern Chongqing area[J]. Oil & Gas Geology, 2013, 34(3): 342-348.

References

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New evidences of reefs,shoals and sedimentary facies of the Changxing Formation in Western Hubei and Eastern Chongqing area

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