等时地层格架下的地震相分析方法与应用研究-应用地球物理专业论文.docxVIP

Ab Abstract PAGE PAGE IV The applied research of the seismic facies analysis under isochronous stratigraphy framework Introduction of the author: Zhuqiang, male, was born in August, 1984 whose tutor was Professor Yan Jian-guo. He graduated from Chengdu University of Technology in Application of Geophysics major and was granted the Master Degree in June, 2010. Abstract With the rapid development of seismic technology, the method of seismic facies analysis diversifies, which include trace shape classification based on SOM(Self-Organizing Mapping) network technology and seismic facies volumetric analysis based on 3D multi-attributes data. For most geologists and geophysicists, they are looking forward to achieving as much information from the seismic data to reflect the real situation of the lithology, petrophysical properties and fluid of subsurface. To build an isochronous stratigraphic framework guided by seismic stratigraphy and sequence stratigraphy is a process that recovers the paleogeography features. By this method, we can extremely reduce the interruption of faults and other factors, and can have a better idea of palaeo-geomorphology and palaeo-sedimentary environment, which brings us much definite geological meaning. This article mainly focused on the basic theory of isochronous stratigraphic framework, and has elaborated the conception of UVT (palaeo- geomorphology time). Through UVT, the seismic data can perfectly be flattened by detecting several main isochronous sequence and faults. For the flattened seismic data, the longitudinal time means the geological time while the time slice reflects the isochronous depositional plane. The main technology used in the article are the method of seismic facies analysis, involving SOM(Self-Organizing Mapping) network technology and multi-attributes facies analysis of seismic volume. Here, the main algorithm have been introduced to our research are trace shape classification ,principal component analysis and hierarc