Community Research and Development Information Service - CORDIS


Cost-Effective Geophysical Technology for Petroleum Exploration in Non-Seismic Areas

Funded under: FP5-EESD


The Magnetotelluric (MT) method is a maturing geophysical method. It is mostly used in projects for deep structure (up to 8 Km for oil exploration and 100 Km in academic research). Its advantage compared to other geophysical methods is that it is very cost effective. However, as a newly developed method (just fifty years of its first use) it is necessary to evolve the processing techniques especially since the method is sensitive to man-made noise sources. Also, on interpretation it is imperative to improve the sub-surface imaging techniques applicable to near-vertical structures with a strong degree of three-dimensionality.
An area in NW Greece has been selected as a test area and field measurements of MT and Time Domain Electro-Magnetic (TDEM) has been acquired. The area consist of an oil target in difficult terrane where other geophysical data exist and which will be used to verify the results of the electromagnetic (EM) methods applied in the area.
During this project a processing method based on the remote reference technique has been developed and implemented into software that has been tested and optimised through the first year of the project. The data acquired during the project were used in order to finalise the processing code implemented.
Analysis and implementation of an inversion code to be used for the interpretation of the MT data has been established. The code, able to produce 3-D imaging of the earth, has been tested into synthetic data and has also been used for modelling the MT data acquired. This included incorporating constraints mostly from wells and less from other available geophysical data. Based on the contrast of the physical properties of the strata, mapping of the reservoir was possible. This results in implementing the state of the art inversion code in two and three-dimensional modelling of magnetotelluric data.
The main project results could be summarised in:
- Processing code of magnetotelluric data
- Data set of magnet

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