Geological grid technology for 3D geology modeling in complex fault-block reservoirs
Xu Fang1, Zhang Wenqi1, Li Juhong2, He Shumei3, Liu Tianhe3
1. Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China;
2. Paradigm Technology (Beijing) Co., Ltd, Beijing 100004, China;
3. Exploration & Development Research Institute, Dagang Oilfield Company, PetroChina, Tianjin 300280, China
Abstract：3D geological model is one of the reservoir geology study final results.However,there are many limitations in establishing an accurate complex structural model and properties model of strong heterogeneity reservoir using common modeling softwares and mathematical algorithms. In this paper, we propose geological grid approach for structural model. This approach is used in Z fault block of Dagang Oilfield. This approach has no grid distortions as the conventional PILLAR grid system has. Moreover, it ensures structure completeness and accuracy. Using facies-controlled multi-variogram analysis, reservoir spatial distribution and physical changes are accurately characterized. Therefore, fast micro-faices change and strong he-terogeneity in reservoirs are well described. And a more realistic reservoir geological model is provided for future oilfield development.
