Flow Assurance Technical Section

Hey All,

I was having a discussion with a colleague and we had different different understanding about the definition of  WGR. My understanding is that WGR is the ratio of water (saturated and free water) to gas. The WGR includes both the water in the gas (saturated) and free water.

His definition is the ratio of water (free water) to gas. The gas is water saturated at reservoir conditions then additional water is added as free water. I feel this is not the right approach.

 I have not been able to find a technical reference (book or paper) to support my definition. I was thou able to find a definition in OLGA user manual [Ratio between water (including water in gas phase) and gas]. to support my definition.

Can anyone  provide any technical reference that shed more light.

Appreciate any help

Thanks

Chuba

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Chuba Oyeka
Flow Assurance Engineerer
Houston TX
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Hi Chuba,

WGR like any other fluid ratios (e.g., GOR or WOR) are based on standard fluid volume conditions and  should be calculated under standard conditions.  Therefore no mater if the water is in the gas as condensable of free water, depending on the gas composition and reservoir pressure and temperature some water in vapour form may be condensed under standard conditions and should be included in  the water to gas ratio. 

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Majid A. Abdi, Ph.D., P.Eng.
Process Engineering and Flow Assurance Consultant
M. A. Procense
St. John's, NL
Canada