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Pre-stack inversion for caved carbonate reservoir prediction: A case study from Tarim Basin, China

Authors :
Zhang, Yuanyin
Sun, Sam
Yang, Haijun
Wang, Haiyang
Han, Jianfa
Gao, Hongliang
Luo, Chunshu
Jing, Bing
Source :
Petroleum Science; December 2011, Vol. 8 Issue: 4 p415-421, 7p
Publication Year :
2011

Abstract

The major storage space types in the carbonate reservoir in the Ordovician in the TZ45 area are secondary dissolution caves. For the prediction of caved carbonate reservoir, post-stack methods are commonly used in the oilfield at present since pre-stack inversion is always limited by poor seismic data quality and insufficient logging data. In this paper, based on amplitude preserved seismic data processing and rock-physics analysis, pre-stack inversion is employed to predict the caved carbonate reservoir in TZ45 area by seriously controlling the quality of inversion procedures. These procedures mainly include angle-gather conversion, partial stack, wavelet estimation, low-frequency model building and inversion residual analysis. The amplitude-preserved data processing method can achieve high quality data based on the principle that they are very consistent with the synthetics. Besides, the foundation of pre-stack inversion and reservoir prediction criterion can be established by the connection between reservoir property and seismic reflection through rock-physics analysis. Finally, the inversion result is consistent with drilling wells in most cases. It is concluded that integrated with amplitude-preserved processing and rock-physics, pre-stack inversion can be effectively applied in the caved carbonate reservoir prediction.

Details

Language :
English
ISSN :
16725107 and 19958226
Volume :
8
Issue :
4
Database :
Supplemental Index
Journal :
Petroleum Science
Publication Type :
Periodical
Accession number :
ejs26424066
Full Text :
https://doi.org/10.1007/s12182-011-0159-4