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Abstract

The Xinchang field in western Sichuan Basin, China<br>produces gas from fractures in tight sandstone<br>reservoirs. An integrated field study was performed<br>using full wave (full-azimuth multi-component)<br>seismic data. The porosities in these reservoirs (2-<br>4%) had little influence on production. The key to<br>locating the best well locations included lithology<br>discrimination and identification of the fractured<br>areas.<br>The impedances of the sands and shales are very<br>similar and can not be discriminated by the P wave<br>data. However, the PS data in this full wave data has<br>been very effective in identifying lithology. Shear<br>wave splitting analysis has also indicated orientation<br>and density of fracturing consistent with regional<br>stress data, well results, core analysis, FMI and<br>outcrop work. The integration of the results from the<br>geologic, seismic and reservoir engineering data has<br>led to selection of 16 new well locations and some<br>early drilling success.

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/content/papers/10.3997/2214-4609-pdb.195.1712_evt_6year_2009
2009-08-24
2024-03-28
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609-pdb.195.1712_evt_6year_2009
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