地质条件约束下的储集层随机建模

Stochastic reservoir modeling restricted by geological conditions

利用传统的顺序指示模拟方法建立储集层沉积微相模型存在不足,即可能在某些位置出现不符合地质规律的微相类型。其原因在于在没有条件数据的地方,传统顺序指示模拟方法是利用微相全局比例建立该点处所属微相类型的概率分布,因此各种沉积微相类型都有可能出现,导致不符合地质规律的情况可能出现。提出相应的改进方法来解决这一问题,主要是利用地质规律对模拟过程进行约束。针对长庆某油田进行了改进前后两种方法的对比研究,结果表明改进的方法产生的结果更符合实际情况。

There is a failure in using a traditional sequential indicator simulation method to establish reservoir framework models, i,e, some micro-facies may appear in places against geological rules. The reason is that the probability distribution of micro-facies is established by use of global proportion of micro-facies in case of no conditional data, thus all types of micro-facies may appear, which results in the phenomena against geological rules. An improving method is introduced and applied in the Changqing Oilfield. The simulation results obtained from improved SISIM method and traditional SISIM method are achieved. The result indicates that using improved SISIM method can get a more realistic simulation result.