基于声电联合性质的储层砂岩饱和度定量表征研究

Oil is an important type of strategic resource and deep-sea oil is one of the new growth points in China. To reduce the deep-sea oil exploration risks, joint marine seismic and controlled source electro-magnetic (CSEM) methods are being widely employed. The interpretation of the joint seismic-CSEM data, however, will be based on the knowledge about the joint elastic-electrical properties of reservoir rocks and their impacting factors. This proposal aims to study the joint elastic-electrical properties for the quantitative characterization of water saturation in reservoir sandstones. The elastic and electrical properties of the partially saturated samples under varying confining pressures will first be simultaneously measured to explore the relationships between the elastic and electrical properties. In combination with the petrophysical parameters including density, porosity, permeability and clay content, the joint elastic-electrical properties of partially saturated sandstones will be studied and their influencing factors and mechanisms will then be analysed. Further, a theoretical model for the joint elastic-electrical properties of partially saturated sandstones accounting for the main parameters affecting the joint elastic-electrical properties will be developed and validated on the experimental data. The work is expected to arrive at the quantitative characterization of water saturation in conventional sandstones based on joint elastic-electrical properties and to aid the interpretation of the joint seismic-CSEM data for deep-sea oil explorations.

石油是重要的战略资源，深海石油是我国石油新的增长点。然而深海石油勘探风险较大，国际上常用地震和海洋可控源电磁法（CSEM）联合勘探来降低风险，但其数据联合解析必须以深入研究岩石声学和电学性质的相互联系及其影响因素和变化规律为基础。本项目围绕基于声电联合性质的储层砂岩饱和度定量表征这个科学目标，实验获得不同压力和含水饱和度情况下典型砂岩声学和电学性质的同步测量数据，研究部分饱和砂岩声学和电学性质间的联系；结合获得的砂岩样品的密度、孔隙度、渗透率和泥质含量等油藏物理特征参数，研究和分析部分饱和砂岩声电联合性质的变化规律和影响因素，探讨和揭示部分饱和砂岩声电联合性质的影响机理；在此基础上，提出针对含水饱和度的岩石物理性质建模方法，建立适合部分饱和砂岩声电联合性质的理论模型，实现基于声电联合性质的常规砂岩饱和度定量表征，为我国深海石油地震和CSEM勘探的数据联合解析提供更加直接的理论。

石油是重要的战略资源，深海石油是我国石油新的增长点。然而深海石油勘探风险大，国际上常用地震和海洋可控源电磁法（CSEM）联合勘探来降低风险，但其数据联合解析必须以深入研究岩石声学和电学性质的相互联系及其影响因素和变化规律为基础。本项目围绕部分饱和常规砂岩声电联合性质与模拟这一科学问题，实验获得了不同压力和含水饱和度情况下典型常规砂岩声学和电学性质的同步测量数据，研究了部分饱和砂岩声学和电学性质间的联系；结合获得的砂岩样品的密度、孔隙度等油藏物理特征参数，研究和分析了部分饱和砂岩声电联合性质的变化规律和影响因素，探讨和揭示了部分饱和砂岩声电联合性质的影响机理；在此基础上，提出了针对含水饱和度的岩石物理性质建模方法，建立了适合部分饱和砂岩声电联合性质的理论模型，实现了基于声电联合性质的常规砂岩饱和度定量表征，为我国深海石油地震和CSEM勘探的数据联合解析提供了更加直接的理论基础和科学依据。项目研究期间，在JGR、GJI和Geophysics与地球物理学报等国内外地球物理学术期刊上发表标注项目资助（项目资助号：41874151）的SCI期刊论文30篇，其中第一标注19篇；培养山东省杰出青年基金获得者1名，培养博士毕业生1名、硕士毕业生4名，其中2名硕士研究生的毕业论文获得中国石油大学优秀硕士学位论文；项目负责人作为主要召集人组织召开国际学术会议5次。