Saturation (2) - Saturation is the ratio of the fluid rock...

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Saturation : is the ratio of the fluid rock to the rock pore volume Types of saturation : 1. water saturation S o 2. oil saturation S w 3. gas saturation S g method to determne of saturation : 1. Retort method 2. Dean starck method 1. Retort mthod : Steps of ths method : Take two sample from the same depth then forehand cut. Sample#1 1. weight sample sw 1 2. crushed sample then put n the sample cell then heat to 170c o . 3. heat to (650_800). Sample #2 1. weight sample sw 2 2. put saturated sample in the sample cell (mercury methd) then calculate following: Vg 1 = Vp 1 - Vp o Vb 2 = Vb 1 – Vb o Vg 1 =Vg 2 *(Ws 1 /Ws 2 ) Vb 2 = Vb 1 *(Ws 1 /Ws 2 )
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Vp = Vo +Vw +Vg Disadvantage of this method : 1. higher temperature will cause higher recovery water than connate water by crystallization within rock material 2. higher temperature will cause oil to crak
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