地质体边界数据是油藏数值动态模拟、盆地模拟、油气分布预测等应用的基础数据。过去 ,地质工作者通过地质图或有关剖面图对地质体边界单元数据进行提取 ,这种方法不便于数据的自动采集和计算 ,且工作量极大。作者应用八方向测试算法和改进的左方向技术 ,用 VisualC++语言编程并实现二维地质体单元边界的自动搜索。该方法对松辽盆地某剖面数据进行实际运算和处理 ,结果表明效果良好 ,值得推广。 Geological body boundary data are the basic data of reservoir numerical dynamic simulation, basin simulation and oil / gas distribution prediction. In the past, geologic workers extracted geologic body boundary unit data through geological maps or relevant profile maps, which is not convenient for automatic data collection and calculation and has a huge workload. The author applies the eight directions test algorithm and the improved left direction technology, and uses Visual C ++ language to program and realize the automatic search of the boundary of two-dimensional geological body unit. The method of Songliao Basin profile data for a practical operation and processing, the results show that the effect is good, it is worth promoting.