储层微观动态模型研究

STUDY ON THE DYNAMIC MICROMODEL OF RESERVOIRS

长期注水开发油田的开发流体长期对储集层进行浸泡、驱动,使得整个储集层的众多微观孔隙与喉道相互连通的极其微小的空间范围内动态改变,岩石骨架、孔喉网络、粘土矿物等方面都发生动态变化。这些变化影响了地下剩余油的分布。该文针对胜坨油田沙二段8砂组三角洲储层,从岩石骨架、孔喉网络、粘土矿物3方面分析并建立了储层微观动态模型,研究了微观变化与剩余油的关系。研究认为这些变化是动态的、持续发生的,使得剩余油的分布更加复杂。

In long-term waterflooding developed oilfields, the long-term immersion and displacement of developing fluid to reservoirs made minute spaces connecting multiple micropores with porethroats dynamically changed, and rock framework, porethroat network and clay mineral also changed dynamically. These changes affected the distribution of underground residual oil. Aimed at the delta reservoirs in the 8th sand formation of the Sha-2 Member in shengtuo oilfield, a dynamic micromodel of reservoirs was established from rock framework, porethroat network and clay mineral three respects, and the relationship between microchanges and residual oil studied. It was suggested that these changes were dynamic and continuous, and made the distribution of residual oil further complicated.