The Research Of Seismic Acquisition For High Density 2D Lines In Erdos Basin Loess Plateau Area

Because of the thicker loess in Loess plateau of the southern Ordosbasin, absorption attenuation of seismic wave is very seirous, The signal-to-noise ratio of data is extremely low, the resolution of seismic data is difficult to predict thin and interbed sand body. At the same time, on account of obstacles such as village and gravevard are dense, setting of these normal exploding parameters are severely restricted, well exploding of the previous great combination can’t adapt to the current seismic exploration. It’s not beneficial to explorate Mesozoic oil.In order to solve the problem, this article starting from the characteristics of loess hills, expounds the surface and deep seismic geological characteristics, analyzes the key factor that influences the quality of the data, This article take a further research in small bin、multi-line、less number of Wells、more number of shots 、high-fold and high-density seismic acquisition method。Firstly, several points test has been done to analyze the energy threshold of the seismic exploration method that using less number of Wells and small-charge, Chosen the appropriate energy excitation parameters,Secondly,taken short-line test to analyze the influence of parameters such as shoot-line numbers、shoot-line space、receive-line numbers and space、trace distance and folds to the quality of seismic records. By comparing the previous conventional line profile and finally explain the link, select the suitable method for high-density seismic acquisition。Through the discussion and research of high-density seismic acquisition, this article formed a series of suitable high-density seismic acquisition technology in loess plateau. draws a conclusion that high-density seismic acquisition can Improve quality of seismic data in complex surface and extremely low SNR areas,and effectively improve the shallow, middle and deep exploration horizons imaging effect,improve the stratigraphic framework and reservoir insider reflect. Provide a clear Oilfield remaining oil distribution. This article also provides optimize the locations of horizontal infill wells and raise oil recovery,Provides an effective method to achieve the best economic benefit and value. Achieved the transformation from seismic exploration to development seismic.