海上拖缆宽线理论及其在南海潮汕坳陷中生界地层中的试验效果分析

The Marine Streamer Wide-line Theory and Its Test Effect Analysis on Mesozoic in South China Sea

借鉴陆地宽线采集方式,首次提出了海上拖缆宽线地震采集处理理论。针对南海珠江口盆地潮汕坳陷中生界地层中进行了海上拖缆宽线处理试验攻关研究,并对应用效果进行了分析。结果表明,宽线资料与常规二维资料相比,表现出了深层反射清晰、反射波丰富、资料信噪比高、横向连续性好的特征。海上拖缆宽线地震采集是提高中深层地震资料质量较为经济、实用、有效的技术,明显提高了潮汕坳陷中生界地层中地震成像效果。

The streamer wide-line marine seismic acquisition and processing theory was first proposed according to land wide-line seismic acquisition.For Mesozoic in Chaoshan Depression from Pearl-river Mouth Basin of South China Sea,experimental studies were carried out on the streamer wide-line marine acquisition processing and application effect was analyzed.The results indicate that comparing with conventional two-dimensional profiles,the wide-line profile data show some features such as a clear reflection of deep strata,rich reflection wave,high signal to noise ratio,and a good lateral continuity.Therefore the streamer wide-line marine seismic acquisition is an economic,effective and practical technology to improve seismic data quality in medium-deep layers.It obviously improves imaging effect of Mesozoic in Chaoshan Depression.