石油物探2017，Vol.56Issue(6)：827-834,8.DOI:10.3969/j.issn.1000-1441.2017.06.008
深部储层流体因子直接反演方法
Direct inversion for fluid factor of deep reservoirs
摘要
Abstract
Exploration of deep reservoirs has been one focus of oil and gas exploration.However,it is difficult to discriminate reservoir fluids in deep reservoirs based on prestack seismic inversions,because of the lack of high-quality large offset prestack gathers.In this study,based on an approximation of the Zoeppritz equations and rock physics theory,we derive a two-term reflection coefficient approximation equation containing the Gassmann fluid and shear modulus terms.A model test shows that this approximation equation has comparative accuracy with the three-term equation,indicating that it can be used for the prestack inversion.Based on Bayesian inversion theory,we establish a probabilistic prestack seismic inversion method with no need for large offset prestack gathers,to invert the Gassmarm fluid term directly for reservoir fluid discrimination.A synthetic test proves its accuracy and robustness,and a real data test demonstrates its applicability and validity.关键词
深部储层流体识别/两项反射系数近似方程/大角度地震数据/贝叶斯理论/叠前反演Key words
deep reservoirs fluid discrimination/two-term reflection coefficient approximation equation/large offset seismic data/Bayesian theory/prestack inversion分类
天文与地球科学引用本文复制引用
李超,张金淼,朱振宇..深部储层流体因子直接反演方法[J].石油物探,2017,56(6):827-834,8.基金项目
中国博士后科学基金(2016M601238)、国家科技重大专项课题(2016ZX05024001)和海洋石油勘探国家工程实验室自由探索课题联合资助.This research is financially supported by the China Postdoctoral Science Foundation (Grant No.2016M601238),the National Science and Technology Major Project of China (Grant No.2016ZX05024001) and National Engineering Laboratory for Offshore Oil Exploration Free Research Project. （2016M601238）
