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| THE APPLICATION OF AVO TO THE PREDICATION OF WATER-ERODED CAVES FILLED WITH LIQUIDS FOR CARBONATE RESERVOIRS |
| SUN Hai-ning1, WANG Xiao-mei2, LIU Lai-xiang3 |
1. Geological Institute of Dongxin Oil Factory, Shengli Oilfield Co.Limited, SINOPEC, Dongying 257094, China;
2. Peking University, Beijing 100084, China;
3. Exploration and Production Research Institute, SINOPEC, Beijing 100083, China |
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Abstract The key of searching for carbonate reservoirs is to find large water-eroded caves filled with liquids. The AVO analysis can identify the nature of the cavern filling in the Tahe Oil Field. Where the water-eroded cave filler is liquid, it has intense S-wave. This is because the S-wave can not be spread in liquids, hence the cavity boundary is the absolute reflection of S-wave. In other words, where the cavity filler is liquid, it has intense reflection of S-wave and P-wave. The AVO technique can thus be used to obtain elastic inversion data. The S-wave attributes can be extracted and the water-eroded cave filled with liquids can be identified.
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Received: 20 November 2007
Published: 24 August 2008
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