Research And Application Of Seismic Acquisition Technology In The Junggar Basin

With the deepening of seismic exploration, most of the Junggar basin has entered into the stage of lithologic exploration, and demand of seismic data accuracy and amplitude preserved for later processing are higher and higher. The development of high efficiency vibrator acquisition technology push forward the high density seismic exploration technology to the ideal target of'two wide and one high'.In recent years, a large number of domestic research manufactures has created the high sensitivity and single analog detector to adapt the development of high density seismic exploration technology. This detector with the lower natural frequency, is more conductive to carry out low frequency exploration, such as the SG-5. The wide azimuth acquisition technology is one of the development trend in the high density seismic exploration, which can achieve the sufficient sample of noise and signal that excited and received densely at a single point. Lithologic reservoir exploration has become the important exploration targets in Junggar basin, the high density single point excitation and receiving to further improve the quality of seismic data in Junggar basin is the key content of seismic exploration workers in the area.In order to verify validation of the new simulation detector, the crew has carried out 2D test in different regions of the Junggar basin, such as the Wu Xia, Ma Hu and the 8th well in Di Nan. Based on the SNR of seismic data, we have carried out the SG-5 type single detector and conventional 30DX-10 geophone receiving contrast test at the low SNR area, such as the Wu Xia and the 8th well in Di Nan. Meanwhile, we have carried out anther contrast test at the high SNR area of the Ma Hu, which received by conventional single detector 20DX-10and conventional geophone 30DX-10. The processor has compared the effect of single and combined detector on CSG quality, de-noise effect, stackprofile and migration profile effect, as well as the effect on resolution and amplitude preserved.The test results show that, compared with the combination detector, single detectorhas much more advantages in the SNR and amplitudepreserved, and the tests promote the single detector applied in next step test and application in the Junggar basin.