三维油藏物理模拟的饱和度测量技术研究  

Saturation measurement technique for 3D reservoir physical modeling

作　　者：沈平平[1] 王家禄[1] 田玉玲[1] 张祖波[1] 

机构地区：[1]中国石油勘探开发科学研究院

出　　处：《石油勘探与开发》2004年第B11期71-76,共6页Petroleum Exploration and Development

基　　金：国家基础研究发展规划(973)项目(G22001511)

摘　　要：实验室一维岩心饱和度测量技术主要测量岩心剖面的饱和度分布,二维可视化物理模拟和微观物理模拟主要定性观察流体在多孔介质中的流动情况,而三维油藏物理模拟测量饱和度分布的技术国内外都没有。应用电阻率测井的电极系测量原理,用先进的双压模技术和耐氧化、耐腐蚀的高技术材料,研制出了能够测量油藏物理模拟中动态饱和度变化的探针,并应用饱和度探针测量了不同实验的一维模型饱和油、水驱油过程中不同位置的饱和度变化;应用Buckley-Leverett方程理论,计算出一维模型出口的端面饱和度,与靠近出口位置实际测量的饱和度进行对比研究的结果是:饱和油时,从出口位置测量的饱和度变化与出口端面计算饱和度变化规律相同,测量探针处先见油,出口端面后见油,二者之间的最终饱和度相近;水驱油时,从出口位置测量的饱和度变化与出口端面计算饱和度变化规律相同,测量探针处先见水,出口端面后见水,二者之间的束缚水饱和度与最终计算的饱和度和测量结果相近。不同实验的探针测量结果基本一致,比较稳定。通过模型3个不同位置探针测量出的饱和度变化,可定量观察到聚合物驱过程中油墙的形成、发展与运动,聚合物驱后3个位置的饱和度都有较大增加。对于一维模型,只有当油墙运动到出口端面时含水率才开始下降。The one-dimension saturation measuring technique focuses on the measurement of the saturation distribution in core cross section. Two-dimension visible physical modeling and microscopic physical modeling focus on the observation of flow mechanism in porous media. While the saturation measuring technique used in tree-dimension reservoir physical modeling is not available in the world. The micro-probes were made by means of double press model technology, antioxidant and anticorrosive materials with electric resistivity theory, which can measure the saturation variation in the reservoir physical model. Technical vacancy of the same field is filled by this technique. Saturation changes at different positions in primary drainage and water flooding processes in different experiments of one-dimension physical modeling are measured. The saturation of the output end face of the model calculated by Buckley-Levertt function is compared with the saturation at the position near the output end face measured by the probe. The agreement between experimental and theoretical results identifies that the method is feasible to measure the saturation variation in physical model in case of primary drainage and water flood. The measuring results with the probe in different experiments are basically the same, the results are stable. Through the results of measured saturation in three different positions with the measuring probe, the formation and development and movement of oil wall can be observed quantitatively. The saturations of water in three positions increase greatly after polymer flooding. For one-dimension model, only when the oil wall moves to the output section does watercut falls and recovery increases greatly.

关 键 词：探针 饱和度 油藏物理模拟 实验研究 

分 类 号：TE311[石油与天然气工程—油气田开发工程]