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Predicting hydrocarbon recovery (view source)
Revision as of 19:26, 28 October 2014
, 19:26, 28 October 2014→Calculating oil volume in place
==Calculating oil volume in place==
==Calculating oil volume in place==
To calculate volume of original oil in place (OOIP), use the following formula:
To calculate volume of original oil in place (OOIP)in barrels from volume measured in acre-feet, use the following formula:
:<math>\text{OOIP} = \frac{7758 \times \text{A} \times \text{h} \times \Phi \times (1 - \text{S}_\text{w})}{\text{B}_\text{oi}}</math>
:<math>\text{OOIP} = \frac{7758 \times \text{A} \times \text{h} \times \Phi \times (1 - \text{S}_\text{w})}{\text{B}_\text{oi}}</math>
* Φ = porosity (decimal, not percent)
* Φ = porosity (decimal, not percent)
* S<sub>w</sub> = water saturation (decimal, not percent)
* S<sub>w</sub> = water saturation (decimal, not percent)
* B<sub>oi</sub> = formation volume factor = 1.05 + (N × 0.05), where N = number of ft<sup>3</sup> of gas produced per bbl of oil (GOR). For example, if a well has a GOR of 1,000, then B<sub>oi</sub> = 1.05 + (10 × 0.05) = 1.1.
* B<sub>oi</sub> = formation volume factor = 1.05 + (N × 0.05), where N = number of ft<sup>3</sup> of gas produced per bbl of oil (gas-oil ratio [GOR]). For example, if a well has a GOR of 1,000, then B<sub>oi</sub> = 1.05 + (10 × 0.05) = 1.1.
==Calculating gas volume in place==
==Calculating gas volume in place==