[鱼翔浅底]

在frontsim中将rptprint设为1后输出alloc.文件后，波及系数是不是=(total volume-pore volume not visited by any streamline)*porosity/total volume ??? 我有一点疑问：流线模拟中的pore volume应该指的是形成流管（线）的油藏孔隙体积（因为有的孔隙间压力势相等，不形成流线）而波及系数一般定义为油藏被水驱替过的体积与油藏总体积之比，其中注采井网间油藏被水波及过的体积并非形成流管（线）体积。流管中一般前一段为纯油区，中间为油水过渡带，后一段为纯水区，并非全部为水所波及到。而按照上面给出的波及系数求解公式显然未考虑流管中有未被波及到的原油。
不知道是否表达清楚，请各位指正，谢谢。

[dynatang]

Sorry, stillnot clear about your question. Try to explain briefly the workflow of frontsim.
1) estabilish streamline by solve pressure field.
2) solve 2D stauration along the streamlines
3) map the saturation back to 3D grids.

You are right... the sweep efficiency is defined by water sweeped volume divided by total pore volume.
in .allocat file there are also a transient factor, which define the fraction of transient-flow-volume/pore volume.
becaue frontsim might not conserve mass due do the streamline simulation assumption.
Still not sure I answer the question or not. Hope it helps.

[鱼翔浅底]

对不起，上次我没表达清楚。
我的意思是：应用Frontslim能否求得波及系数？如果可以，具体怎么操作？
如果应用the transient factor,我认为也不可以。因为 the transient factor is defined as the fraction of transient-flow-volume/pore volume,其中transient-flow-volume的每根流管也不是被水全部波及，即前一段为纯油区，中间为油水过渡带，后一段为纯水区。所以，按波及系数定义，这样也不可以。 :(