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本文根据塔里木盆地布格重力异常的功率谱特征,决定重力异常分解成3个层次,即反映沉积盆地基底的异常、反映沉积盆地深层的异常和反映沉积盆地浅层的异常.然后,探讨将小波变换多尺度分析和密度反演方法应用于塔里木盆地布格重力异常的分解和盆地三维结构密度研究,并根据钻探了解每个层次对应着的地质含义.通过塔里木盆地的重力异常的多尺度分析和密度反演,说明浅层和深层密度扰动信息主要与盆地内古流体活动带有关,即极性为负的浅层密度扰动主要与中生代流体活动带有关,深层负密度扰动信息主要与古生代流体活动带有关.古流体活动是油气聚集成藏的必要条件之一,指出古流体活动带有利于预测油气远景区,体现了这种新方法的科学和应用价值.
According to the power spectrum feature of the Bouguer gravity anomaly in the Tarim Basin, the gravity anomaly is decomposed into three levels, which reflect the basement anomalies in the sedimentary basins, reflecting the deep anomalies in the sedimentary basins and the shallow anomalies in the sedimentary basins.Then, The transform multi-scale analysis and density inversion method are applied to the study of the decomposition of the Bouguer gravity anomaly in the Tarim Basin and the study on the three-dimensional structural density of the basin. According to the drilling, the geological meaning corresponding to each level is obtained. Based on the multi-scale analysis of gravity anomalies in the Tarim Basin The density inversion shows that the shallow and deep density disturbance information is mainly related to the paleo-fluid activity belts in the basin. That is, the shallow density disturbance with negative polarity is mainly related to the Mesozoic fluid activity belts. The information of deep negative density perturbation is mainly related to the Paleozoic fluid activity The paleo-fluid activity is one of the necessary conditions for oil and gas accumulation and accumulation. It is pointed out that the paleo-fluid activity zone is conducive to the prediction of oil and gas prospects and reflects the scientific and practical value of this new method.