石油地球物理勘探2019，Vol.54Issue(2)：356-364,前插4,10.DOI:10.13810/j.cnki.issn.1000-7210.2019.02.014
基于依赖频率AVO反演的高含气饱和度储层预测方法
High gas-saturation reservoir prediction based on frequency-dependent AVO inversion
摘要
Abstract
Elastic parameters obtained by conventional preor post-stack inversions are not sensitive to gas saturation of reservoirs.Therefore,we use dispersion parameters obtained by frequency-dependent AVO inversion to predict high gas-saturation reservoirs.First the influence of sand-reservoir saturation on viscosity of different fluid mixtures is analyzed with Refutas equation; and the influence of gas-saturation on velocity dispersion and attenuation is analyzed with the dynamic equivalent- medium theory and Woods formula.Then the frequency-dependent AVO inversion is achieved based on f-μ-ρ AVO approximation;and the sensitive dispersion factor is optimized.The following phenomena are obtained in results:①Different fluids have different dispersion and attenuation,and dispersion and attenuation are dependent on water or gas saturation; ②The optimized dispersion factor is more sensitive to high gas-saturation reservoirs and less affected by the background,which can accurately depict the spatial disdistribution of high gas-saturation reservoirs.关键词
依赖频率的AVO/频散/衰减/含气饱和度/储层预测Key words
frequency-dependent AVO/dispersion/attenuation/ gas saturation/reservoir prediction分类
天文与地球科学引用本文复制引用
罗鑫,陈学华,张杰,蒋伟,孙雷鸣,肖为..基于依赖频率AVO反演的高含气饱和度储层预测方法[J].石油地球物理勘探,2019,54(2):356-364,前插4,10.基金项目
本项研究受国家自然科学基金项目"致密储层裂缝系统诱发地震异常的机理及其与产能的关系"(41874143)、"含流体弱能量暗点储层的地震识别机理与方法"(41574130)、国家"十三·五"科技重大专项"各尺度碳酸盐岩裂缝储层结构的地震精细描述研究"(2016ZX05014-001-009)和四川省青年科技创新研究团队项目"油气地球物理勘探"(2016TD0023)联合资助. （41874143）
