Apparent Resistivity Joint-inversion Research And Application Based On Multi Resource Geophysics Data Fusion

Geological exploration work has gradually evolved from a single traditional means to a new era ofintegrated exploration techniques. Multi-solution of single geophysical method is a fundamental problem ofgeophysical exploration. Integrated multi-scale, multi-physics geophysical data joint inversion methods ofgeophysical research have become a popular research field.On the basis of the existing technology research, an apparent resistivity data joint-inversion workflowbased on data fusion to study the integration of multiple geophysical data sets could be found. First, wegathered raw well log data sets, electromagnetic data processed by wavelet transform, pre-stack seismicdata from pure wave amplitude preservation process, and the other original geology information. Second,three types of apparent resistivity could be got by inversion, and then the data sets would be converted intothe unified space of depth domains. Third, after resample by corresponding methods, all these data sets willbe normalized in the same range. Then, a series of standard data sets with different electromagneticelements would combine with principal component analysis. The appropriate principal component factoranalysis of the response geological characteristics would be found. Model simulation shows that apparentresistivity joint-inversion methods have the positive significance for reducing inversion uncertainty andrunning with higher resolution and more accurate. Real data sets processing in3D work area also show thatapparent resistivity joint-inversion methods have the positive significance for reducing inversionuncertainty and improving geophysical resolution. Analysis and interpretation of the results show that themethod to predict the corresponding geological understanding of the higher degree of agreement, and thesection and plane maps provide more accurate analysis with great practical value. All the results can help uslocate the abnormal targets and improve efficiency.Via the research in this paper, pseudo apparent resistivity from the different geophysical data setsinversion and integration make integrated geophysical raised to a new level of internal laws. Because of thelimitations of the data itself, this result from the can only reflect the situation of the exploration period, when we use the prospecting results, the limitation needs to pay attention to. Data space registration andstandardization methods can be applied to other geophysical data; other data fusion techniques can also beemployed to obtain new analytical results besides principal component analysis.