关键词: 油藏物理模拟, 饱和度分布, 大厚高压油藏, γ 射线测量法

Abstract: Current research on saturation distribution of physical model focuses on the one-dimensional small rock sample and
two-dimensional thin model，and research on high-pressure and large-thick reservoirs model has been involved. In this paper，
the timing stable gamma ray test to each model grid node is implemented with high precision two-dimension Computerized
Numerical Control（CNC）mobile positioning system，and then the saturation of each grid node is calculated through Lambert
Law. Afterwards，reservoir saturation profile is obtained using mathematical drawing method and the prediction of saturation
distribution measurement in high-pressure and big-thick reservoir physical model is finally realized. After a single point testing
and a simple replication experiment，this method is proved to be feasible and accurate and significant to predict the saturation
distribution of high-pressure and large-thick reservoir model.

Key words: reservoir physical simulation, saturation distribution, high-pressure and large-thick reservoir, gamma measurementmethod