The Study Of Complex Surface Seismic Date Acquisition Method In LiaoHe Basin

The ratio of signal and noise of old seismic data is not high in Liao He basin. They aren't able to meet the requirement of prospecting and exploitation today. The old seismic data block continuing development of LiaoHe Oil Field. For meeting fine interpretation of structure and description of oil reservoir, a serial seismic acquisition method studies were performed.The method of seismic acquisition in Da Min Tun area was systemic expatiated in this paper as follows:1. Weather layer survey and interpretation in complicatedly area: adopt multi-methods for surface structure's surveying. Increase the number of sampling point. Log lithology of hole. Improve acquisition precision. At the same time, apply the kinematics and dynamics of wave to fine interpretation;2. Fine geometry design for target object: according to the seismic geological conditions and acquisition index of deep layer of target area, we researched primary acquisition parameters and designed optimal geometry. At the same time, reasonably modify the geometry at the special obstacles;3. From theory researching to test analyzing, systemic study the relationship of quantity of dynamite, energy, frequency and sub-wave, get the optimal source parameters;4. Receiver parameters: geophone is very important during seismic acquisition. We study how to affect the quality of seismic data by sensitivity, dynamic range, frequency speciality, the coupling and array of geophone in this paper;5. the suppress method of interference wave(including ground wave and wind noise)By researching and testing, formed an advanced fine 3D seismic technology including fine survey of weather layer; geometry design technology to target object; exploding technology in the optimal depth (optimal lithology); low noise receiving technology. Above technologies were applied during seismic acquisition in Da Min Tun. We got perfect result. The new seismic data is better than old one. All kind of geological objects are clear, such as fundus, burial mountain, fault and so on. The maximum frequency of seismic wave reach at about 80-90Hz, is higher about 30Hz than old data. At the same time, the new seismic data filled the blank of seismic section.