Study On Detection Method And Application Of Dipole Acoustic Wave

With the energy and resource exploration and development zone geological target structure becomes more and more complex,the resolution of traditional seismic exploration method is difficult to meet the requirements of target exploration,the detection range is limited to within 2m of the conventional sonic logging can not describe the well Structure.The description of the structure or structure of the well need to detect the response information in the range of ten meters or tens of meters in depth,and the long-distance dipole acoustic imaging logging is such a method that can be collected from well-Structure and structure of the structure and the resulting elastic response.Dipole acoustic logging imaging is a new technology developed in recent years,which serves as a bridge between communication seismic exploration and traditional acoustic logging lateral resolution.Acoustic reflection far detection imaging based on the type of acoustic source used in two different categories: single-pole acoustic source is a longitudinal wave source,through the reflection of longitudinal wave imaging,the acoustic source can not reflect the direction of the well around the characteristics of the integrated characteristics The dipole wave imaging technique utilizes the dipole acoustic source to extract the asymmetric torsion wave with low frequency characteristics,and then uses the cross dipole acoustic data to extract the azimuth and crack information of the geological body.In this paper,the characteristics of wellbore acoustic field and the working mode of acoustic wave logging are analyzed.On this basis,the method of data processing of unipolar acoustic data is discussed,including wavelength data filtering,upgoing and downgoing traveling wave field separation and migration imaging.By using the azimuth field information,the filed information and data structure of the four-component data of dipole shear wave are further analyzed,and the azimuth of the reflector is extracted by four component data.Through the actual data processing of the paper,it is known that dipole shear wave imaging,has important guiding significance for fracture evaluation and geological interpretation.