Application And Effect Analysis Of High Precision 3D Seismic Acquisition Technology In Gaoyou Depression

The Gaoyou depression is a favorable exploration area for the Jiangsu Oilfield to find multiple types of oil reservoirs and multiple target strata.With the exploration direction of the original structural exploration in Jiangsu Oilfield and the shallow and middle exploration targets are adjusted to lithological exploration and deep targets,it is necessary to collect data to provide higher signal-to-noise ratio,resolution and imaging accuracy.However,the previous 3D seismic acquisition in this area was restricted by the technology and equipment at that time,and the signal-to-noise ratio and resolution of the data were low,which could not meet the current geological requirements.Therefore,the pace of exploration and development in Jiangsu Oilfield was severely restricted.There is an urgent need For research on collection technology in this area.This paper analyzes the geological factors that affect the quality of the previously collected data in Gaoyou Depression.Through the research and application of a series of seismic acquisition techniques,the improvement of the quality of seismic data has been significant,and a certain degree of understanding has also been obtained.In terms of the geometry,using the geometry design technology based on pre-stack imaging,variable panel technology and seismic wave numerical simulation lighting technology,the geometry parameters are optimized from four aspects: coverage times,panel size,track spacing,and maximum offset.The design and optimization process of the high-precision three-dimensional geometry in this region has been improved.In terms of stimulating factors,the system point test was carried out to optimize the stimulating parameters through fine surface structure investigation to ensure the best stimulating effect.In terms of receiving factors,compare different combination modes and different combination base distance detector combinations,and select the most suitable detector combination parameters.This paper summarizes the high-precision 3D seismic acquisition technology suitable for Gaoyou Depression based on the actual application effect,which effectively meets the exploration needs of Jiangsu Oilfield in this area.