一种计算致密油气藏储层饱和度指数的新方法

• Format: Patent
• Language: Chinese
• Published: 05.04.2022
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

本发明涉及一种致密储层饱和度指数的计算方法，是一种评价致密储层电性特征参数的准确有效手段。计算步骤依次包括：(1)岩心准备，切割为A、B、C三段，A段用于润湿性分析，B段用于铸体薄片分析，C段用于离心核磁共振实验；(2)储层岩石润湿性分析；(3)储层岩石微观结构分析，确定形状因子G；(4)样品离心核磁共振实验，获取离心过程核磁共振T2谱；(5)计算饱和度指数n。本发明结合岩石微观结构、润湿性分析和离心过程核磁共振T2谱，准确计算得到致密储层不同含水饱和度条件饱和度指数n，为致密油气藏勘探开发过程储层含水饱和度准确定量评价奠定基础。 The invention relates to a tight reservoir saturation index calculation method, which is an accurate and effective means for evaluating the electrical characteristic parameters of a tight reservoir. The method comprises steps: (1) a core is prepared to be cut into three sections A, B, and C, the A section is used for wettability analysis, the B section is used for cast flake analysis and the C section is used for a centrifugal nuclear magnetic resonance experiment; (2) reservoir rock wettability analysis is carried out; (3) reservoir rock microstructure analysis is carried out to determine a shape factor G; (4) a sample centrifugal nuclear magnetic resonance experiment is conducted to acquire a nuclear magnetic resonance T2 spectrum in the centr