立體氣槍陣列延遲激發(fā)震源特性及在淺海區(qū)OBS探測中的應(yīng)用
[Abstract]:The deep geophysical exploration experiment of artificial earthquake was carried out in the shallow sea area of northern China by using the delayed excitation source of the stereoscopic air gun array composed of medium and small capacity air gun and the seafloor Seismograph (OBS). Based on the water depth condition and the need to suppress the virtual reflection of water body and improve the low frequency energy, the air gun source has enough output energy and high quality wavelet characteristics, and the working mechanism of delayed excitation source by stereoscopic air gun array is studied. The combination parameters are optimized by far field wavelet theory simulation and the offshore test is carried out. The results show that the delayed excitation source of the stereoscopic air gun array composed of medium and small capacity air guns adapts to the excitation environment in shallow water, reduces the local notch and interference caused by virtual reflection, and effectively improves the quality of OBS signal. A variety of seismic phases, such as Ps,Pg,PmP,Pn, have been obtained. The application of delayed excitation source of stereoscopic air gun array composed of medium and small capacity air gun in OBS detection in shallow sea area has been innovated, and the blank of deep seismic detection data in South Huang Hai sea area has also been filled, which is the South Yellow Sea. The study of deep crustal structure and the formation and evolution of petroliferous basins in Bohai Sea provides important basic data.
【作者單位】: 國土資源部海洋油氣資源與環(huán)境地質(zhì)重點實驗室;青島海洋地質(zhì)研究所;青島海洋科學(xué)與技術(shù)國家實驗室海洋礦產(chǎn)資源評價與探測技術(shù)功能實驗室;中國科學(xué)院地質(zhì)與地球物理研究所;上海海洋石油局第一海洋地質(zhì)調(diào)查大隊;國家海洋局第一海洋研究所;中國海洋大學(xué);
【基金】:國家自然科學(xué)基金項目(41210005,90814011) 國家“863”計劃項目(2009AA093401) 國土資源部地質(zhì)調(diào)查專項(GZH200800503,GZH201200509)聯(lián)合資助
【分類號】:P631.4
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