摘要
番禺地区B目标主要目的层是发育在SQ21.0层序陆架坡折带上的低位楔三角洲砂体,其单层厚度薄、横向变化快。针对该区地震资料分辨率低、砂体尖灭边界较难落实的问题,从具有典型沉积特征的地震剖面入手,建立地质地球物理模型,并通过模型参数的正演,探讨了砂体顶部钙质高速层以及不同泥岩隔层厚度下的砂体尖灭响应特征;在此基础上应用属性分析和叠前同步反演等技术对砂体尖灭线进行了精细描述;最后结合实际资料和钻探结果的检验,进一步证实了该技术组合的有效性。
The main target formation of B-area in Panyu Field is a lowstand-tract wedge-shaped delta sandstone developing on the shelf break zone in SQ21.0sequence,which has thin layers and fast horizontal changes.Aiming at the difficulties of low resolution of seismic data and the uncertainty of sand pinchout boundary,this paper built geological and geophysical model from seismic profile of typical deposition,studied on the seismic response on sand pinchout of calcareous high-velocity overlying strata and different shale interlayer thickness by forward modeling;on the base of these,we applied seismic attribute analysis and pre-stack simultaneous inversion to finely describe the sand pinchout line;lastly,we confirmed the availability of the technology combination with the verification of real seismic and drilled data.
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2013年第6期1268-1273,共6页
Natural Gas Geoscience
基金
"十二五"国家科技重大专项(编号:2011ZX05023-002-007)资助
关键词
陆架坡折带
尖灭
岩性圈闭
模型正演
叠前同步反演
Shelf-break belt
Pinchout
Lithologic trap
Forward modeling
Pre-stack simultaneous inversion
