三维非地震数据体技术研究

【作者】 姜彦南；

【导师】 王绪本；

【作者基本信息】 成都理工大学 ， 地球探测与信息技术， 2005， 硕士

【摘要】 本论文三维非地震数据体的研究主要是对大地电磁测深法勘探和重磁位场勘探的资料进行相应的处理和解释: 1、大地电磁测深法勘探资料 对于经过预处理的大地电磁原始数据,或者反演后的数据,通过相应域(原始数据是频率域,反演后数据是深度域)三维网格化,在三维网格化数据基础之上进行相应的异常提取方法,如边缘检测、滤波法和相干处理等,以提高大地电磁测深资料的解释精度,降低资料的解释难度,缩短解释周期,减少解释中的人为因素和解释结果的多解性与随意性,使解释人员对复杂地质异常的解释更加客观、合理、可靠和稳定。 2、重磁位场勘探资料 在重磁位场勘探中获得的地面观测数据是与大地坐标相关的“面”的信息,没有空间“体”——深度的概念。而在空间分布的重磁位场数据包含着各种频率成分,由于大地滤波作用,使得低频主要反映深部地质信息,高频则反映浅部地质信息。对重磁“面”资料应用多分辨率小波分解,以利于对空间重磁异常的快速把握。因此,对这些重磁资料进行空间异常分解是十分必要的。 基于三维非地震数据体的研究为非地震资料提供可靠的辅助手段和解释性平台。更多还原

【Abstract】 This thesis puts emphasis on the 3-D Non-seismic data Cube Technique. That is, the processing and interpretation method limited in the data of telluric electromagnetic prospecting and gravity-magnetic method exploration.1. Telluric electromagnetic prospecting dataThe pre-processed rude (Frequency domain) or inversed (Space domain) MT data are changed into 3-D grid data at first. And then they are processed through mining abnormalities, such as ED, filter and coherency processing method, which improve the MT data interpretation precision, reduce the interpretation difficulty, shorten the interpretation period and lessen the artificial factor, multi-explanation and randomness. All of that make the interpreter interpret the complex geological abnormality more objectively, reasonably, reliably and stably than before.2. Gravity-magnetic potential field exploration dataThere is no "cube" (i.e. depth) but only "surface" information in the gravity-magnetic method exploration data achieved on the ground. The data contain various frequencies. Due to the earth capable of lowpass filter, the lower frequency exploration data reflects the deeper information. It is useful for getting hold of the gravity and magnetic potential field abnormality to apply the wavelet multi-resolution decomposing to gravity and magnetic potential field exploration "surface" data. So, it is needed to decompose the data into "cube".The study based on the 3-D non-seismic data cube technique provides a reliable assistant method and an interpretation platform.更多还原