2011, 30(4) 624-630 DOI:     ISSN: 1004-5589 CN: 22-1111/P
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Keywords
formation interface
well logging curve
seismic reflection
Denglouku Formation
Changde gas field
Songliao Basin
Authors
ZHANG Yan-1
SUN Ya-Lin-2
WANG Pu-Jun-1
WU Yan-Hui-1
YAO Rui-Shi-1
Zhai Xue-Jiao-1
PubMed
Article by Zhang, Y. 1
Article by Sun, Y. L. 2
Article by Wang, P. J. 1
Article by Wu, Y. H. 1
Article by Yao, R. S. 1
Article by Zhai, X. J. 1

Interface characteristics of the Third and Fourth Members of Denglouku Formation in deep Changde gas field��Songliao Basin

ZHANG Yan-1, SUN Ya-Lin-2, WANG Pu-Jun-1, WU Yan-Hui-1, YAO Rui-Shi-1, Zhai Xue-Jiao-1

1. College of Earth Sciences��Jilin University��Changchun 130061��China; 2. Daqing Oilfield Limited Liability Company��Daqing 163000��Heilongjiang��China

Abstract��

The Third and Fourth Members of Denglouku Formation ( K1 d3 and K1 d4 ) are the important gas productive reservoirs in Changde gas field��Songliao Basin�� However��the interfaces of K1 d3 and K1 d4 have been confused in definition before��which impeded the oil and gas exploration�� The authors studied the characteristics of K1 d3��K1d4 and key interface by lithological��logging and seismic analyses��and adjusted the defination of the interfaces based on their characteristics�� Lithologically��the K1d3 and K1 d4 mainly are composed of mudstone��developing lacustrine and meandering river facies�� In the K1 d3��the resistivity curve presents high frequency��mediumhigh amplitude��and finger or box shape�� The base surface of K1 d3 is the bottom boundary of sandstone and top boundary of mudstone��and the gamma ray curve shows negative step shaped��while the elective resistance shows positive step shaped with onlap and toplap characteristics in seismic profile�� In the K1d4��the resistivity curve presents medium-high frequency��medium amplitude��finger and box interbed shape�� The base surface of K1 d4 is the bottom boundary of mudstone and top boundary of sandstone��and the gamma ray curve shows positive step shaped�� while the elective resistance shows negative step shaped with concordance characteristics in seismic profile�� Thus�� the definitions on the imferfaces of 12 wells in the bottom of K1d3 and 8 wells in the bottom of K1d4 were adjusted��

Keywords�� formation interface   well logging curve   seismic reflection   Denglouku Formation   Changde gas field   Songliao Basin  
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