Research On Key Seismic Acquisition Method Of Fault Depression Groups In New Area Of Northern Songliao Basin

Songbei and Sanjiang-Dunhua blocks are the peripheral areas of Songliao Basin and Sanjiang Basin.Due to the low exploration degree of the blocks,Low-mature Source Rocks and sandstone reservoirs and a small amount of asphalt show have been found in some sags,indicating that hydrocarbon generation and accumulation events have occurred in these areas,which has certain exploration potential.Among them,Songbei block has a large area,low exploration degree and relatively independent fault depressions,which can be characterized by independent basin formation,hydrocarbon generation and reservoir formation.The distribution and evolution of source rocks are complex,and the distribution of oil and gas resources is relatively complex.There are two blocks in eastern Harbin and Suihua,which have the possibility of long-distance hydrocarbon supply and great potential for oil and gas exploration.In view of the fault depression groups in the northern new area of Songliao basin,the research on seismic acquisition methods is carried out.While high-quality seismic data are obtained,a set of key seismic acquisition techniques and basic on-site processing methods suitable for this area are summarized.In the demonstration of the observation system,the design optimization and verification of the observation system based on double basis are proposed to ensure that the attributes of the observation system can meet the requirements of geological tasks.Through accurate surface structure investigation and modeling methods,the broadband excitation effect is ensured;According to the needs of geological targets,research on excitation and reception techniques is carried out to improve the quality of original seismic data.In the aspect of data processing,through the research of interference wave suppression method and static correction technology,the imaging effect of complex geological targets is improved,and finally a set of key seismic acquisition technologies and basic processing methods for fault depression groups in the northern new area of Songliao Basin are summarized and formed.