[bkdhunter]

There is a heavy oil field.Its experiment report(.doc) its components from C10 to C58+,and with weight fractions,but no other data(like mole weight).When i import "component, weight fraction, mole weight" to the foundamentals panel,and give FPE the value, the error comes out:
1.(see the attachment)"the fluid model is not monotonic"
2.I click the OK,the second error comes out signed "symbol error",it says "[pressure] value 9e019 is out of range (0.00999,10000)"
3.I click the OK, when the dialogue "calculating phase plot",the PVTi crashed

BTW,I give the mole weight myself.

Pls give me some suggestion.Thank you very much!

稠油油藏的现场实验报告给了C10-C58+ 28个组分。数据有组分的质量分数，但是没有摩尔质量（我自己根据经验给的）。将数据导入foundamentals里，FPE赋值后，出现以下错误：
1.说“流体模型不是单调的”
2.点击上面对话框的OK后，弹出错误“压力值超范围”
3.接着点OK，发现弹出对话框“calculating phase plot”后，PVTi死了

附加文件

•  monotonic.jpg (16.53K)
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•  symbol error.jpg (9.58K)
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[gulfmoon79]

没有C1到C9的组分吗？油的API是多少？你的PVT分析目的是什么？

[bkdhunter]

引用框（gulfmoon79 ＠ 08-12-2011 - 17:21）

没有C1到C9的组分吗？油的API是多少？你的PVT分析目的是什么？

原油组分里没有C1-C4.原油组分里C5-C9的质量分数全部为0

前期为水驱开发，后期为气水交替开发，我PVT分析的目的是想输出 水驱（黑油模型）部分和 气水交替驱（组分模型）的PVT数据

gulfmoon，请指点，我该如何做？
我有的实验清单如下：
1.注入气 的 组分和体积摩尔百分数；
2.粘温数据；
3.脱气油 体积系数 随温度压力变化 数据；
4.脱气油密度(g/cm3)随压力和温度的变化 数据；
5.不同温度下，含气油的溶解气油比、体积系数及粘度随压力变化 数据；
6.模拟蒸馏法原油组分及百分含量 数据
7.原油4组分分析数据表

[ytlee]

What are the goals of your simulation?

[bkdhunter]

引用框（ytlee ＠ 08-15-2011 - 10:22）

What are the goals of your simulation?

To simulate the difference between water flooding and WAG flooding for heavy oil

[ytlee]

If your goal is to evaluate development options. For tertiary recovery, it is better to start with theoretical model than numerical.

For numerical modeling, even thought the field has been flooded, you are better off to start with primary recovery, then the secondary then finally the tertiary.

With primary and secondary production history to tune the model, you will have a more stable IC and better defined BC, With the theoretical model to guide you, you will have better control of workflow and expectation.

[ytlee]

BTW, you better have a reputable firm re-do the PVT study. A sample of petroleum fluid that completely lack of c1-c9 is unheard.

[bkdhunter]

引用框（ytlee ＠ 08-15-2011 - 20:18）

BTW, you better have a reputable firm re-do the PVT study. A sample of petroleum fluid that completely lack of c1-c9 is unheard.

Thx,ytlee
in field development,first ten years,it's water flooding,then,WAG flooding.
so,I have to simulate it using compositional model.

and, i am sure of that,the C1-C9 does not exsit from experiment report! 'cause I cannot find the C1-C4,and find the C5-C9' weight fractions all are 0. but the injection gas contains the C1-C4,along with N2 and Co2

[ytlee]

Even the solid tarball contains C1-C9. No primary nor EOR can take out all C1-C9. Primary and secondary processes may deplete the lighter components faster but can't reduce them below irreducible level.

That is the reason I suggested to you to start the simulation from primary production, observe the component behaviour, let the simulator set the IC for you for the tertiary phase.

[bkdhunter]

引用框（ytlee ＠ 08-16-2011 - 00:21）

Even the solid tarball contains C1-C9. No primary nor EOR can take out all C1-C9. Primary and secondary processes may deplete the lighter components faster but can't reduce them below irreducible level.

That is the reason I suggested to you to start the simulation from primary production, observe the component behaviour, let the simulator set the IC for you for the tertiary phase.

you r right,ytlee.
but i just recieved an experiment report which does not have the C1-C4,and with C5-C9 0 weight fraction.

what's more,i have to simulate the field development,which first water flooding,then WAG flooding

rather than giving me the doubt of data,pls give me suggestion if possible

[gulfmoon79]

1. ytlee先生说的很好，你的流体数据可能有问题。质量控制是我们数模工作者工作的一部分，我们不能拿来就用，这样你将来的项目验收可能会有困难。
2. PVT数据出现的问题可能是由于取样时压降太大，没有取到单相流体。或者实验室分析有问题。
3. 除了weight fraction，你有摩尔分数吗？
4. 另外如果你的样品是开采多年后取的样品，你可以通过数模模型和CCE实验回复回原始的组分。
5. PVT分析过程较复杂，你要有耐心。

[bkdhunter]

引用框（gulfmoon79 ＠ 08-16-2011 - 12:32）

1. ytlee先生说的很好，你的流体数据可能有问题。质量控制是我们数模工作者工作的一部分，我们不能拿来就用，这样你将来的项目验收可能会有困难。
2. PVT数据出现的问题可能是由于取样时压降太大，没有取到单相流体。或者实验室分析有问题。
3. 除了weight fraction，你有摩尔分数吗？
4. 另外如果你的样品是开采多年后取的样品，你可以通过数模模型和CCE实验回复回原始的组分。
5. PVT分析过程较复杂，你要有耐心。

3.摩尔分数（mole fraction）没有
4.开采时间有10多年，PVT实验最近才做，应该是开采后取的样品。

[ytlee]

引用框（bkdhunter ＠ 08-15-2011 - 22:15）

i have to simulate the field development,which first water flooding,then WAG flooding

rather than giving me the doubt of data,pls give me suggestion if possible

It seems to me your interests are in the meaningless output.

The first rule of computing, "Garbage in, Rubbish out".
First rule of simulation "Data Q/C".
PVT analysis is part of fluid simulation which is the first and critical phase of reservoir simulation. If you can't make sense of the fluid sample, you can't simulate the fluid dynamics. Hence, you may as well forget the simulation.

My suggestion to you, re-learn first rule in computing.

In the meantime, you can contact Oliver Mullins @SLB or a reputable downhole fluid analysis specialist to assist you to get a good sample and do a re-construct study.

If you can't, use theoretical model for your study.

[ytlee]

引用框（gulfmoon79 ＠ 08-15-2011 - 23:32）

...
2. PVT数据出现的问题可能是由于取样时压降太大，没有取到单相流体。或者实验室分析有问题。
3. 除了weight fraction，你有摩尔分数吗？
....。

If I have to make a wild guess, I suspect the sample is not a down hole sample and/or the contaner/transporting device/procedure is not proper. I based my guess on the fact that no light components in the report.

PS. if there is no way to get downhole sample which is a common problem for mature fields, then you should get a gas sample and liquid sample at separator, do a re-construct study at known reservoir conditions.
Again get a reputable lab and experienced specialist to collect the sample. Most oil field workers don't know the proper procedure to collect and prepare the sample for transportation to the lab.

[bkdhunter]

引用框（gulfmoon79 ＠ 08-16-2011 - 12:32）

...
4. 另外如果你的样品是开采多年后取的样品，你可以通过数模模型和CCE实验回复回原始的组分。
....

gulfmoon,请告诉我如何回复到原始的组分？
我现在时间特别紧张，需要高人您的指点