--> Abstract: High-Frequency Sequence Stratigraphy Framework and Reservoir Distribution in Puguang Gas Field, China, by Z. Changmin, T. Yin, S. Zhang, Y. Zhu, and Z. Xu; #90090 (2009).
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High-Frequency Previous HitSequenceNext Hit Stratigraphy Framework and Reservoir Distribution in Puguang Gas Field, China

Changmin, Zhang 1; Yin, Taiju 1; Zhang, Shimin 2; Zhu, Yongjin 1; Xu, Zhongbo 1
1 College of Geoscience, Yangtze University, Jingzhou,Hubei, China.
2 Zhongyuan OilField Company, SINOPEC, Puyang, China.

Few high frequency Previous HitsequenceNext Hit stratigraphy framework in carbonate are reported. Puguang Gas Field, with over 250 billion cubic meter natural gas reserve in Permian Changxing Formation and Triassic Feixianguan Formation carbonate, is the largest natural gas reservoir found in carbonate in China. High frequency Previous HitsequenceNext Hit framework was founded and reservoir properties and distribution were discussed according to seismic data and wireless Previous HitlogNext Hit data, especially the total radioactive logging and energy spectnma logging of Th, which provided clues for the shale content in the stratigraphy for ODP. Through the shale content and facies Previous HitanalysisNext Hit, 2 third Previous HitsequenceNext Hit, 6 forthsequence and 11 fifth Previous HitsequenceNext Hit were recognized in Changxing Formation, and 2 third Previous HitsequenceNext Hit, 9 forth Previous HitsequenceNext Hit and 16 fifth Previous HitsequenceNext Hit were recognized in Feixianguan Formation. The reservoir in this field is mainly made of reef and oolitic beaches and the pore is mainly secondary dissolved pore. Reservoir is mainly founded in the middle two third sequences in this field, and its distribution is controlled by the depositional system. In the TST tract of Permian, reefs grew Previous HitwellNext Hit, and the reservoir is also Previous HitwellNext Hit developed, while in the TST tract of Triassic, the oolitic beaches developed Previous HitwellNext Hit and they made the most reservoir. On the areal distribution, the reservoir is better on the west part than that on the east part of the reservoir for the reef and oolitic beeches is mainly developed and on the eastern part there are mainly made of lagoon and tidal shale platform. In the forth rank Previous HitsequenceNext Hit stratigraphical framework , reservoir were also ruled by the sea level changes, reef and oolitic beaches development. Usually the good reservoir are founded in the fifth Previous HitsequenceTop of the middle location in the framework.

 

AAPG Search and Discovery Article #90090©2009 AAPG Annual Convention and Exhibition, Denver, Colorado, June 7-10, 2009