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南海火成岩油气藏具有广阔的勘探前景,综合利用地球物理方法圈划与识别火成岩体、研究火成岩分布是火成岩油气藏研究的基础。针对南海重磁场特征,采用低纬度、变倾角化极技术进行了磁异常化极处理,利用优选延拓方法实现重磁异常分离并提取南海海域浅部火成岩重磁异常信息,利用磁异常三维相关成像给出南海火成岩的三维空间等效分布,在重磁梯度突出局部异常边界信息的基础上,通过梯度加权的重磁相关分析勾画不同类型火成岩的平面展布,火成岩的分布特征显示出受地壳深部结构及断裂构造的控制与影响。
The igneous reservoirs in the South China Sea have broad prospects for prospecting. Comprehensively utilizing geophysical methods to circle and identify igneous rocks, the study of igneous rock distribution is the basis for the study of igneous reservoirs. According to the characteristics of the South China Sea heavy magnetic field, the magnetic anomaly is processed by using the low latitude and variable angle polarizer technique. The gravity and magnetic anomaly information of the shallow igneous rocks in the South China Sea is extracted using the preferred continuation method. The magnetic anomalous 3D correlation The three-dimensional space equivalent distribution of igneous rocks in the South China Sea is given by imaging. Based on the information of the local anomalous boundaries highlighted by the gravity and magnetic gradients, the distribution of igneous rocks is outlined by gravimetric gravity-magnetic correlation analysis. The distribution of igneous rocks shows that the crust Control and Influence of Deep Structure and Fault Structure.