Key techniques and effects of seismic acquisition for deep oil and gas exploration in Junggar Basin
The exploration rate of deep oil and gas in the Junggar basin is relatively low under the depth of 4 500 m.In re-cent years,deep oil and gas exploration targets have become a strategic replacement area for exploration and discovery.In order to find out the deeper subsurface structure,the two-dimensional seismic grid in the Junggar basin was reconstructed and de-ployed.Using the previously acquired and newly acquired 2D data,two-dimensional grid survey networks were formed,inclu-ding tens of lines.Based on the"two-wide and one-high"seismic technologies,a series of crucial acquisition technology are a-dopted,such as the"three-high and one-long"acquisition technology of"high-density shots,high-density receivers,high folds density,and long offset",which solved some critical issues of seismic signals characterized by weak energy,strong noise,poor imaging or un-imaging,etc.in deep targets exploration in Junggar basin.The imaging resolution of the newly processed data has been significantly improved,which provides a sound data basis for establishing the stratigraphic framework of the Carboniferous Permian system in the basin,defining the uplift and depression pattern of Carboniferous,and identifying the distribution charac-teristics of the lower combination strata and source rocks in the hydrocarbon-rich sag,and provides effective guidance for the next step of deep oil and gas exploration.
Junggar basindeep oil and gasseismic acquisition2D griddata qualitytwo-wide and one-high seismic
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