///Taking well spacing density, seismic interpretation and fault data, reservoir prediction and sedimentary microfacies research result as controlling modeling factors, integrated with some technical means such as probability statistics, variogram analysis and sequential Gaussian association Kriging method, the fine 3D geologic model for complex fault-block reservoir in Qiuling oil field in Tuha Basin is developed, by which the digitization and visualization of comprehensively researched results of geology of Qiuling oil field are realized.