石油地球物理勘探2019，Vol.54Issue(2)：312-319,前插2-前插3,10.DOI:10.13810/j.cnki.issn.1000-7210.2019.02.009
大规模气云区成因分析——以渤海湾A油田为例
Origin analysis of the large-scale shallow gas-obscured zone:an example of the Oilfield A,Bohai Bay
摘要
Abstract
A large-scale gas cloud zone in the Oilfield A,Bohai Bay causes poor quality of P wave data,so subsurface structures are very difficult to be depicted.Based on multi-discipline information including surface seismic, VSP,and geologic data,we build a number of 2D and 3Dmodels and achieve the forward modeling based on acoustic equation and synthetic data evaluation.According to our research,the seismic wave scattering caused by shallow large-scale heterogeneous stratum (shallow gas zone)is an important reason for blurring seismic imaging of gas cloud zone.The sag structure perpendicular to the long axis direction of shallow gas further aggravates the imaging difficulty on existing 3D seismic data(acquisition along the long axis direction of shallow gas zone).Real data processing shows that the near-surface velocity provided by turning-ray tomography, and wave equation prestack depth migration (PSDM)with multi-wave arrivals can improve the imaging quality of P-wave in the gas cloud zone.关键词
气云区/散射体/模拟/回转波层析/波动方程深度偏移Key words
gas cloud zone/scatters/simulation/turningwave tomography/wave-equation prestack depth migration(PSDM)分类
天文与地球科学引用本文复制引用
明君,邹振,夏同星,曹盛,刘垒..大规模气云区成因分析——以渤海湾A油田为例[J].石油地球物理勘探,2019,54(2):312-319,前插2-前插3,10.基金项目
本项研究受国家科技重大专项"渤海油田高效开发示范工程"(2016ZX05058-001)和"油藏及非常规气藏地球物理配套技术"(2017ZX05018-004)联合资助. （2016ZX05058-001）
