The image above represents the cumulative GOR.

To compute for the cumulative GOR, two essential parameters are needed and these parameters are **cumulative gas production (G _{p}) and cumulative oil production (N_{p}).**

The formula for calculating the cumulative GOR:

R_{p} = ^{Gp} / _{N}_{p}

Where;

R_{p} = Cumulative GOR

G_{p} = Cumulative Gas Production

N_{p} = Cumulative Oil Production

Let’s solve an example;

Find the cumulative GOR with a cumulative gas production of 32 and a cumulative oil production of 44.

This implies that;

G_{p} = Cumulative Gas Production = 32

N_{p} = Cumulative Oil Production = 44

R_{p} = ^{Gp} / _{N}_{p}

R_{p} = ^{32} / _{44}

R_{p} = 0.72

Therefore, the **cumulative GOR** is **0.72.**

**Calculating the Cumulative Gas Production when the Cumulative GOR and the Cumulative Oil Production is Given**

G_{p} = R_{p} x N_{p}

Where;

G_{p} = Cumulative Gas Production

R_{p} = Cumulative GOR

N_{p} = Cumulative Oil Production

Let’s solve an example;

Find the cumulative gas production when the cumulative GOR is 56 and the cumulative oil production is 19.

This implies that;

R_{p} = Cumulative GOR = 56

N_{p} = Cumulative Oil Production = 19

G_{p} = R_{p} x N_{p}

G_{p} = 56 x 19

G_{p} = 1064

Therefore, the **cumulative gas production **is **1064.**