叠前密度反演技术在顺南地区碳酸盐岩储层预测中的应用

The Application of Pre-stack Seismic Inversion Technology to the Carbonate Reservoir Prediction in the Shunnan Area

顺南地区是塔里木盆地天然气勘探有利区,为了提高油气勘探成效,利用叠前地震反演技术在该区开展碳酸盐岩储层预测的探索性研究。首先,利用工区钻井、测井、测试、岩芯等资料开展测井曲线质量分析及标准化工作,提高测井曲线的可靠性;然后,通过开展多井储层弹性参数的敏感性分析,认为密度参数对该区储层识别较为敏感;最后,进行叠前弹性参数反演剖面与已钻井储层信息的对比分析,确定叠前密度反演与钻井吻合度最高,提高了储层在纵向上的预测精度。

Shunnan is the favorable area for gas exploration of Tarim basin. To improve the efficiency of oil and gas exploration, we use pre-stack seismic inversion technique in the region to carry out exploratory research on carbonate reservoir prediction. First of all, working area drilling, logging, testing and core data are used for logging curve analysis and quality standardization work, which can improve the reliability of logging curve. Secondly, by conducting multiple well reservoir elastic parameter sensitivity analysis, the density parameters are thought to he rather sensitive to the reservoir identification. Pre-stack elastic parameters inversion profiles and drilling reservoir have been analyzed comparatively, which proves the density of pre-stack inversion is highly consistent with actual drilling and improves the vertical accuracy of reservoir prediction.