摘要
油气在输导体系中的运聚模拟一直是石油地质定量化研究中的难题。针对传统地质建模技术不能在三维空间中建立输导体相互联系的现状,采用混合维数网格建模思路,形成一种由体(地层)、面(断裂面和不整合面)、线和点构成的混合维数网格建模技术,为砂体、断面和不整合面几何形态的刻画、复杂构造区三维地质建模以及油气运聚模拟提供重要的研究手段,并提出了一种基于输导体系混合维数网格的三维油气运移路径追踪方法。准噶尔盆地陆西地区的应用实例显示,该技术能够有效刻画断层面、不整合面和砂体的输导作用,透视油气运移路径,模拟石油聚集、油藏调整及次生油藏的形成过程,揭示油气分布规律,指出古油藏附近和运移路径所覆盖的区域是油气分布有利区。
Migration and accumulation simulation of oil and gas in carrier systems has always been a difficult subject in the quantitative study of petroleum geology. In view of the fact that the traditional geological modeling technology can not establish the interrelation of carriers in three dimensional space, we have proposed a hybrid-dimensional mesh modeling technology consisting of body(stratum),surfaces(faults and unconformities), lines and points, which provides an important research method for the description of geometry of sand bodies, sections and unconformities, the 3D geological modeling of complex tectonic areas, and the simulation of hydrocarbon migration and accumulation. Furthermore, we have advanced a 3D hydrocarbon migration pathway tracking method based on the hybrid-dimensional mesh of the carrier system. The application of this technology in western Luliang Uplift of Junggar Basin shows that the technology can effectively characterize the transport effect of fault planes, unconformities and sand bodies, indicate the hydrocarbon migration pathways, simulate the process of oil accumulation, reservoir adjustment and secondary reservoir formation, predict the hydrocarbon distribution. It is found through the simulation that the areas around the paleo-oil reservoir and covered by migration pathways are favorable sites for oil and gas distribution.
引文
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