根据地球物理、声学探测及海底取样等实测资料详细分析 ,发现北部湾油气勘探开发区具有近岸、水浅等优越自然条件以及复杂的海洋工程地质特征。海底地形地貌较为复杂 ,存在潮流沙脊与潮沟、海底沙波、埋藏古河道、浅层气、埋藏古陡坡、滑塌断层及可能的砂土液化层等潜在灾害地质因素 ,对海上构筑物存在直接或潜在的危险性。尤其在东部 ,海底坎坷不平 ,活动性的潮流沙脊、侵蚀沟槽、海底沙波及浅层气等很发育 ,是海底工程建设的危险区 ,应引起高度重视 According to the detailed analysis of the measured data, such as geophysical, acoustic and seafloor sampling, it is found that the Beibu Gulf Oil & Gas Exploration and Development Zone has the superior natural conditions of nearshore and shallow water as well as the complicated marine engineering geological features. The topography of the seabed is more complex with potential geological disasters such as tidal current sand ridge and tidal channel, submarine sand wave, buried ancient river channel, shallow gas, buried ancient steep slope, slump fault and possible sand liquefaction layer, Direct or potential danger. Especially in the east, the seabed is uneven, and active tidal sand ridges, erosion trenches, submarine sand waves and shallow gas are well developed, which are the dangerous areas for the construction of the seabed and should be highly valued