| 摘要: |
| 针对笛卡儿正交网格在描述复杂井型以及复杂油藏边界时存在的局限性,提出了综合运用径向网格、笛卡儿 网格和六边形PEBI网格的混合PEBI网格计算方法。该方法中,在直井区域采用径向网格,可实现网格体积由小到 大的变化;在复杂井区域采用笛卡儿网格,可充分把握井筒附近的流动状态;在油藏区域采用六边形PEBI网格，可 更好地逼近复杂油藏边界和断层的形态。应用结果表明,混合PEBI网格具有髙度的灵活性,与有限差分五点格式 相比,有效降低了网格取向效应，能够满足精细油藏数值模拟的要求。 |
| 关键词: PEBI网格 笛卡儿网格 数值模拟 网格取向效应 复杂井 |
| DOI： |
| 分类号: |
| 基金项目:中石油股份公司科技项目(06-02A-02-01) |
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| Application of numerical simulation of complex well based on hybrid PEBI grid |
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AN Yong-sheng, WU Xiao-dong, HAN Guo-qing
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(MOE Key Laboratory of Petroleum Engineering in China University of Petroleum，Beijing 102249，China)
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| Abstract: |
| Aimed to the limitations of description for complex wells and geologically complex reservoirs by using Cartesian grid in numerical reservoir simulation, the hybrid grid calculation method of combination hexagonal PEBI grid with radial grid and Cartesian grid was put forward. In this method, the radial grid was used in the region with vertical well, and the grid volumes become large quickly. The Cartesian grid was used in the region with complex well，and the pressure behavior near the horizontal well bore could be described clearly. While the hexagonal PEBI grid was used in reservoir region, the geometry of complex reservoir and fault could be well approximated. The application results show that the hybrid PEBI grid has flexibility, and the grid orientation effects can be eliminated effectively. So it can meet the demands of fine numerical reservoir simulation. |
| Key words: PEBI grid Cartesian grid numerical simulation grid orientation effects complex well |
