地震反演数据体融合技术预测有效砂岩

Effective Sandstone Prediction with the Fusion Technique of Seismic Inversion Data Body

常规波阻抗反演分辨率低且不能在砂岩中有效区分砂岩和干层,不能满足NP油田油气开发的需要。通过创新攻关,提出了一种预测有效砂岩的敏感测井曲线分析方法和地震反演数据体融合技术。通过测井数据交会分析可知,自然伽马曲线可以很好地区分砂、泥岩,密度曲线可以区分砂岩中的干层和有效砂岩,但不能区分砂、泥岩。因此利用自然伽马曲线和密度曲线分别进行地质统计学反演,求取自然伽马数据体和密度数据体,然后求取2种数据体的交集进行有效砂岩预测。预测结果分辨率高,效果较好,对砂、泥岩地层的油气开发有借鉴意义。

The resolution of regular seismic impedance inversion was low and could not distinguish sandstone from dry layer and could not satisfy the demands of oil and gas development of NP Oilfield.Through innovative research,a sensitive logging curve analysis method and seismic inversion data volume fusion technique were proposed for the prediction of effective sandstone.The logging curve analysis indicates that natural gamma ray curve can effectively distinguish sandstone,mudstone,and the density curve can distinguish the dry layer and effective sandstone in the sandstone,but can not distinguish the sandstone and mudstone.Therefore,the natural gamma curve and density curve are used for geostatistical inversion and for obtaining gamma dataset and density dataset then the sandstone can be effectively predicted by seeking the intersection of the 2datasets.The results are high resolution with better effect,it can be popularized to the oil and gas development in sand and shale formation.