石油物探2012，Vol.51Issue(6)：570-573,4.DOI:10.3969/j.issn.1000-1441.2012.06.004
山前带地震成像技术需求与勘探策略分析
Analysis of seismic imaging technology requirements and exploration strategy in foothill area
摘要
Abstract
Complex surface conditions is the origin for the difficult seismic exploration in foothill areas, which causes low S/N and serious moveout variation between gathers and is the main reason for constraining seismic imaging and further hydrocarbon prediction in such areas. Nowadays, we yet not own a correct ideology about the seismic acquisition & imaging and lack a suitable seismic data processing procedure and corresponding software, which limit the breakthrough of the oil exploration in the foothill areas. From the seismic and geological reality, we analyzed the peculiarity of the seismic acquisition and imaging in foothill area, and proposed a viewpoint that seismic acquisition should be based on the in-phase stack of the reflections from half Fresnel band. On the basis of the wavefront from any subsurface scattering point (or reflection point) to the surface were collected completely, we should pay much more attention on the high fold and low-frequency signal (such as smaller than 6 Hz). For seismic imaging in foothill area, we should obey the following rules: ① seismic imaging should start from a smoothed datum which is close to the real topography and near the surface; ② the unified horizon velocity estimation and model building for surface and middle-deep layers is regarded as the core of the procedure; ③ beam integral PSDM is chosen as the main migration tool. In general, the urgent matters for the foothill seismic exploration include field acquisition guided by correction ideology and the development of specialized imaging software.关键词
山前带地震成像/复杂地表条件/低信噪比/剧变的道间时差/速度估计与建模/射线束叠前深度偏移Key words
foothill seismic imaging/ complex surface conditions/ low S/N/ serious moveout variation between gathers/ velocity estimation and model building/beam ray prestack depth migration分类
天文与地球科学引用本文复制引用
杨勤勇,王华忠,刘少勇,方伍宝..山前带地震成像技术需求与勘探策略分析[J].石油物探,2012,51(6):570-573,4.基金项目
中国石油化工股份有限公司科技开发部"库东三维地震成像技术研究"项目(P11033)资助. （P11033）
