FIELD: geophysics. SUBSTANCE: invention describes system using methods of nuclear magnetic resonance to obtain information relative to composition of geological structure. This system uses changing window of time selection (W1, W2, W3) which enhanced efficiency of selects since system has capability of optimization of discretion interval which in its turn gives possibility to maximize amount of data that can be obtained in sequence of data selects. EFFECT: improved authenticity of determination of composition of geological structures.
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