PREDICTION AND APPLICATION OF ASSOCIATED INTRUSIVE ROCKS IN PRE-SALT CARBONATE RESERVOIR OF SANTOS BASIN
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摘要:
桑托斯盆地盐下勘探领域，碳酸盐岩储层发育区岩浆岩同样广泛发育，在地震成像质量相对较差的条件下，侵入岩难于预测。分析了桑托斯盆地盐下侵入岩的成因类型特征，进而通过波动方程正演模拟的方法开展侵入岩反射特征分析。依据侵入岩地震反射特征，首先通过敏感属性预测侵入岩的平面分布范围，进而利用薄层模型完成基于调谐曲线的侵入岩厚度预测。将这一侵入岩预测技术应用到研究区，准确地预测了侵入岩发育区和侵入岩厚度，并通过概率法定量评价了侵入岩的发育体积。
Abstract:ntrusive magmatic rocks occur widely in the pre-salt carbonate reservoir of the Santos Basin, Brazil. It is difficult to predict intrusive bodies with the seismic images relatively poor in quality. In this paper, the genesis of the pre-salt intrusive rocks in Santos Basin are studied, and the reflection characteristics of the intrusive rocks analyzed with wave equation for forward modeling. According to the reflection characteristics of intrusive rocks, the spatial distribution of intrusive rocks is predicted with sensitive attributes, and the thickness of intrusive rocks predicted based on tuned thickness by the thin-layer model. Through the application of proposed prediction technology in contract block, the developed area and thickness of intrusive rock are precisely predicted. Finally, the volume of intrusive rocks is quantitatively calculated by probability method.
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Key words:
- intrusive rock /
- wave equation modeling /
- pre-salt /
- probability method /
- carbonate reservoir /
- Santos Basin
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表 1 研究区侵入岩预测误差统计
Table 1. Statistical data of prediction errors of
井名 实钻侵入,岩厚度/m 预测侵入 岩厚度/m 预测误差/m Well-1 68.6 59.7 8.9 
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