The Study On The Joint Euler Deconvolution Methods Of Gravity And Its Gradients

The current implementation of the large area and great depth exploration program extensively, it is a urgent need for automatic inversion and interpretation method of calculation technology on potential field abnormal data and its gradient to enhance the ability to find the target, which constituting a cutting-edge technology and research focus of the current research in this field. As a method of simultaneously using potential field and gradient field data to automatically estimate the source location, the Euler deconvolution method has been widely used in the past decades, and achieved good results. The advantage is more flexible to adapt to changes in geological objects, the hypothesis of geological model form does not require precisely, without regard to the direction of magnetization of the magnetic field, the ability to joint processing and interpretation of homologous potential field data, interpreted automatically and independently under less geological information circumstances. At the same time, by means of supercomputing and parallel computing through a high-performance computer, increases the calculation process to determine the spatial distribution of field source automatically or semi-automatically. Practically, the method can not only solve the problem of qualitative field source, but also address quantitative computational problems of field source position variation, and can effectively circle the basic outline of the anomaly sources, especially suitable for great depth analysis and interpretation and processing large-scale grid and gravity and magnetic data.However, the application of Euler deconvolution in years shows the inversion results of the radiation in the implementation process, it is difficult to determine the calculated parameters to whom lack of background. Mainly manifested in the strong dependence of the data quality; the selection of calculate window size and the outcome of the focus on construction index; it will affected on large area fixed windows and construction index focusing on geological objects and effect of equivalence. In particular, in recent years, the ability to obtain the gravity gradient magnetic field measurement data had been enhanced effectively, widely used in aviation data collection methods, constitutes the distribution characteristics through air and ground magnetic and its gradient data acquisition from different observation angel.The traditional approach is to complete the calculation of each observation side and then synthesize the results, rather than to achieve the intergration of data in the calculation process to explain the common field source. Thus, the conventional method of how to conserve and use information better on calculation and analysis faces new challenges.To solve these problems, this dissertation based on the study on the basis of Euler deconvolution theory, in-depth research on Euler equations data and field source corresponding relationship problems, key focus on data corresponding to different heights observing conditions and the relationship between Euler equations, also studied the issue since the establishment of the observed surface height variations caused by the control parameter adjustment and the joint Euler equation. Finally, research on calculation errors and credibility of the inversion result assessment.The following results have been achieved through a lot of analysis and calculation verification:1. Euler joint inversion can improve the traditional single observation side data instability solutions by use of different types of potential field data and observation face data of different heights. Increasing the joint data calculate and interpret of different heights can improve the impact the of results within a movement window. The results show that the greater the amount of energy to meet the statistical regulation, the resulting data is more stable solution, the convergence process more improved.2. In response to the integration of different data and achieve a high degree of joint inversion problem, the range of different heights as a window to select the reference, which ensures that statistical data within the window Prerequisites for use, but also avoids the selection window is too large for impact of the results of inversion degree. In addition, a joint inversion test also has been done to analysis and calculation of the theoretical models for a variety of height data, using statistical research carried out fine condition data is accurately estimated, and explore the small window Euler deconvolution may be the future direction of development, which can solve the smoothing solution with large windows problem and different field source aliased to the same window interaction problems.3. For a magnetic field or gravity field data sets, computational analysis also showed that the anomalous field gradient data is calculated is comparied to measured gradient data, the much more information contained in the measured data than the former, in addition, the focus character can be improved.The study has developed algorithms for different height of tensor Euler Deconvolution to handle gridded data, and the results show that these effective measures can enhance the effectiveness of the application of traditional Euler inversion methods. Combined gravity and tensor data from Bell Geospace, Vinton Dome was analyzed. Collecting the geological and geophysical data, first analysis the characteristic of gravity anomalies, and then use Euler deconvolution method to inverse the Vinton Dome to obtain the faults distribution and reference depth. The result show that the combine of different height Euler deconvolution tighter clustering.