FIELD: physics.
SUBSTANCE: invention relates to geophysics and can be used for exploration of hydrocarbon deposits. Disclosed is a downhole measuring device configured to pass through a wellbore, which comprises source and 3-component receiver. Source is configured to emit a source signal, which can be a longitudinal or transverse wave, into a volume of material surrounding the wellbore. Source signal propagates through the volume of the material surrounding the borehole and is reflected from the special elements located in the volume of the material surrounding the borehole. Three-component receiver comprises first element, second element and third element. First element is oriented in the first plane orthogonal to the borehole axis, and receives the first component of the plurality of reflections of the source signal. Second element is oriented in the first plane orthogonal to the first element and receives the second component of the set of reflections of the source signal. Third element is oriented parallel to the axis and receives the third component of multiple reflections of the source signal.
EFFECT: technical result is high accuracy and information value of obtained data by enabling detection of small and large cracks extending to tens of meters from well shaft, which can serve as storage or conducting paths for hydrocarbons.
10 cl, 7 dwg
