桩海地区海底结构调查技术及应用

环渤海湾地区油气资源丰富,是目前胜利油区勘探开发的主要场所。由于极浅海及浅海地区海底结构复杂,该地区高精度地震勘探存在许多技术难题。常规的表层结构调查方法受到限制,无法详细了解海底结构。根据桩海地区实际情况,首次在地震勘探领域应用海底结构调查技术,查清了极浅海和浅海海底沉积结构;根据海底沉积地层与海水速度,建立了相应的极浅海和浅海近地表地质结构速度模型和吸收衰减模型,有助于获得陆、滩、极浅海和浅海的整体表层结构,为滩浅海高精度地震勘探资料采集及处理提供重要的依据,提高了地震勘探质量。

Seabed structure survey technology and its application in Zhuanghni area

source of oil and gas is abundant around the Bohai Bay, which is the main area for exploration and development in the Shengli oilfield at present. Because of the complex seabed structure in the shallow sea and extreme shallow sea, there are many technical problems using high-precision seismic exploration in this area. General method of surface structure survey is difficult to know the structure of the seabed in detail. According to the Zhuanghai reality, first to apply the technology of seabed structure survey in the field of seismic exploration, made the sediment structure of the shallow sea and extreme shallow sea clear. Then their corresponding velocity model and absorption decay model of the near-surface geological structure are built based on the seabed deposit stratum and seawater velocity. This is helpful to get the whole surface structure of land, beach, extreme shallow sea and shallow sea. It provides important method for the high precision seismic prospecting acquisition and seismic processing of beach and shallow sea area and improves the quality of seismic exploration.