摘要
Abstract
In the central part of Qaidam Basin, Quaternary bio-genetic gas system has been proved for the shallow layers, which consist of six gas fields, i.e., Sebei-1, Sebei-2, Tainan, Taijinaier, Yanhu, Tuofengshan. Apparently, due to gas cloud effects, typical phenomena, such as pull-down, low frequency, and poor deep imaging, occur in time sections across the gas fields. Pre-stack depth migration (PSDM) is an effective interpretation tool for the explorationist, as image enhancement and depth sections provide new reliable insights. Image improvement is achieved by building an accurate velocity model, enabling reflective energy to be correctly positioned and thereby increasing signal-to-noise ratio. In Sebei Block (Qaidam Basin), the resulting depth sections removed velocity effects associated with time sections and allowed the interpreter to better understand the structural setting and timing.关键词
柴达木盆地/涩北区块/气烟囱/叠前深度偏移Key words
Qaidam Basin/Sebei Block/Gas cloud/Pre-stack depth migration分类
天文与地球科学
