Research On Seismic Field Data Acquisition Method In Loess Tableland Kekeya Adjacent Areas

Kekeya adjacent areas is the focus of exploration in southwestern of the Tarim Basin, but because of its surface is covered with thick soil and the static correction is very difficult, coupled with complex subsurface structure, the seismic acquisition raw data signal to noise ratio is very low. Kekeya adjacent areas seismic exploration concentrated in the last century and the beginning of this century, mainly carried out by the conventional 2D seismic exploration method, the results are not satisfactory in many regions where no valid information was obtained. With the new round of seismic research started, how to improve the collection methods so as to improve the signal to noise ratio of raw data to meet the needs of Kekeya regional structure needs to start exploration is the main subject. Based on the work including analysis of seismic geological features and in-depth analysis of test data over the past decade research combined with recent research carried out tests, at the same time learn from the experiences of other low signal to noise ratio areas, defined the general idea of seismic acquisition which means "wide-line + large geophone array + multi-well excited". Through research experiment, the method and obtain good exploration results, effectively improving the signal to noise ratio, broke through the information gaps of southwestern areas.