Patent ID: 8265913
Filing Date: 2012-09-11
Classification: G01V

Abstract:
1. A computer-implemented method of analysing results from a controlled source electromagnetic survey of a region of interest, the region of interest containing a previously identified geological structure suitable for bearing hydrocarbons, the method comprising: providing a first controlled source electromagnetic survey data set obtained outside and away from the region of interest for a range of source-receiver orientations and offsets; providing a second controlled source electromagnetic survey data set obtained inside the region of interest for a range of source-receiver offsets; performing in a processor of a computer a mathematical inversion of the first controlled source electromagnetic survey data set to provide a model of the subterranean strata outside and away from the region of interest; and processing the second controlled source electromagnetic survey data set to provide a model of the subterranean strata inside the region of interest, wherein the processing takes account of the model of the subterranean strata outside and away from the region of interest.