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LaTeX Math Inline
bodyq^{\uparrow}_{O, k}

volume/day

oil production rate for 

LaTeX Math Inline
bodyk
-th producer

LaTeX Math Inline
bodyC^{\uparrow}_{O,k}

cash/volume

cost of produced oil treatment and transportation from 

LaTeX Math Inline
bodyk
-th wellhead to CMS

LaTeX Math Inline
bodyR_O

cash/volumeoil selling price

LaTeX Math Inline
bodyq^{\uparrow}_{G, k}

volume/day

gas production rate for 

LaTeX Math Inline
bodyk
-th producer

LaTeX Math Inline
bodyC^{\uparrow}_{G,k}

cash/volume

cost of produced gas treatment and transportation from 

LaTeX Math Inline
bodyk
-th wellhead to CMS

LaTeX Math Inline
bodyR_G

cash/volumegas selling price

LaTeX Math Inline
bodyq^{\uparrow}_{W, k}

volume/day

water production rate for 

LaTeX Math Inline
bodyk
-th producer

LaTeX Math Inline
bodyC^{\uparrow}_{W,k}

cash/volume

cost of produced water treatment and transportation from 

LaTeX Math Inline
bodyk
-th wellhead to CMS

LaTeX Math Inline
bodyN^{\uparrow}_P

counts

number of producers at 

LaTeX Math Inline
bodyt

LaTeX Math Inline
bodyq^{\uparrow}_{L, k}

volume/day

liquid production rate for 

LaTeX Math Inline
bodyk
-th producer

LaTeX Math Inline
bodyC^{\uparrow}_{L, k}

cash/volume

cost of fluid lift from reservoir to the 

LaTeX Math Inline
bodyk
-th wellhead, cash/volume

LaTeX Math Inline
bodyN^{\downarrow}_W

counts

number of water injectors at 

LaTeX Math Inline
bodyt

LaTeX Math Inline
bodyq^{\downarrow}_{W, i}

volume/day

water injection rate for 

LaTeX Math Inline
bodyi
-th water injector

LaTeX Math Inline
bodyC^{\downarrow}_{W,i}

cash/volume

cost of water injection, including purchase, treatment, transportation and pumping into 

LaTeX Math Inline
bodyi
-th well

LaTeX Math Inline
bodyN^{\downarrow}_G

counts

number of gas injectors at 

LaTeX Math Inline
bodyt

LaTeX Math Inline
bodyq^{\downarrow}_{G, i}

volume/day

gas injection rate for 

LaTeX Math Inline
bodyi
-th gas injector

LaTeX Math Inline
bodyC^{\downarrow}_{G,j}

cash/volume

cost of gas injection, including purchase, treatment, transportation and pumping into 

LaTeX Math Inline
bodyi
-th well

LaTeX Math Inline
bodyt

monthstime


The objective function  Left part of equation 

LaTeX Math Block Reference
anchorOF
can be rewritten in terms of Surface flowrates and Sandface flowrates 
LaTeX Math Inline
body\{ q^{\uparrow}_L, q^{\downarrow}_W, q^{\downarrow}_G \}
:

LaTeX Math Block
anchorESCY5OF_L
alignmentleft
G(t) = \sum_{p=1}^{N^{\uparrow}_P} \left[ 
\left[  (R_O -  C^C^{\uparrow}_{OGW}  \cdot q^{\uparrow}_{OL, p}) + (R_G -
- \sum_{i=1}^{N^{\downarrow}_W} C^{\uparrowdownarrow}_{GW,pj}) \cdot  Yq^{\downarrow}_{gW,p i} \right] 
- \cdot (1- Ysum_{w,p}) 
- C^{\uparrow}_{L,p} -j=1}^{N^{\downarrow}_G} C^{\uparrowdownarrow}_{WG,pj} \cdot Yq^{\downarrow}_{wG,p j} 
\right]  \cdot q^


LaTeX Math Block
anchorKPBIE
alignmentleft
C^{\uparrow}_{L, p}
- \sum_{i=1}^{N^{\downarrow}_W}OGW}(t) = \left[  (R_O -  C^{\downarrowuparrow}_{WO,jp}) \cdot q^+ (R_G - C^{\downarrowuparrow}_{WG, i} 
- \sum_{j=1}^{N^{\downarrow}_G} C^{\downarrow}_{G,j} \cdot p}) \cdot  Y_{g,p} \right]  \cdot (1- Y_{w,p}) 
- C^{\uparrow}_{L,p} - C^{\uparrow}_{W,p} \cdot Y_{w,p} 

where

LaTeX Math Inline
bodyY_{w,k} = q_{W,k} / q_{L,k}

Watercut in 

LaTeX Math Inline
bodyk
-th well

LaTeX Math Inline
bodyY_{g,k} = q_{G,k} / q_{O,k}

Gas-Oil Ratio in 

LaTeX Math Inline
bodyk
-th well



The objective function  

LaTeX Math Block Reference
anchorOF_L
can be further rewritten in terms of Sandface flowrates 
LaTeX Math Inline
body\{ q^{\uparrow}_t, q^{\downarrow}_w, q^{\downarrow}_

...

g \}
:

LaTeX Math Block
anchorG_sf
alignmentleft
G = \sum_{k=1}^{N^{\uparrow}_P} G^{\uparrow}_{t,k} \cdot q^{\uparrow}_{t, k}
- \sum_{i=1}^{N^{\downarrow}_W} G^{\downarrow}_{w,i}  \cdot 
q^{\downarrow}_{w, i}
- \sum_{j=1}^{N^{\downarrow}_G} G^{\downarrow}_{g,j}  \cdot q^{\downarrow}_{g, j} \rightarrow \rm max

...

LaTeX Math Block
anchorGg
alignmentleft
G^{\downarrow}_{g,i} = B_{g,i} \cdot C^{\downarrow}_{G,i}


where

LaTeX Math Inline
bodyB_{w,k} = B_w(p_{wf,k}(t))

Water FVF for 

LaTeX Math Inline
bodyk
-th well

LaTeX Math Inline
bodyp_{wf,k}(t)

BHPin 

LaTeX Math Inline
bodyk
-th well

LaTeX Math Inline

bodyY_{w,k} = q_{W,k} / q_{L

bodyp_{wf,k}

Watercut in 

(t)

BHPin 

LaTeX Math Inline
bodyk
-th well

LaTeX Math Inline
bodyB_{o,k} = B_o(p_{wf,k}(t))

Oil FVF for 

LaTeX Math Inline
bodyk
-th well

LaTeX Math Inline
bodyR_{s,k} = R_s(p_{wf,k}(t))

 Solution GOR in 

LaTeX Math Inline
bodyk
-th well

LaTeX Math Inline
bodyY_{g,k} = q_{G,k} / q_{O,k}

Gas-Oil Ratio in 

LaTeX Math Inline
bodyk
-th well

LaTeX Math Inline
bodyB_{g,k} = B_g(p_{wf,k}(t))

Gas FVF for 

LaTeX Math Inline
bodyk
-th well

LaTeX Math Inline
bodyR_{v,k} = R_v(p_{wf,k}(t))

 Vaporized Oil Ratio in 

LaTeX Math Inline
bodyk
-th well




Expand
titleDerivation


Panel
borderColorwheat
bgColormintcream
borderWidth7


LaTeX Math Block
anchor427RB
alignmentleft
G(t) = \sum_{p=1}^{N^{\uparrow}_P} \left[ 
(R_O -  C^{\uparrow}_{O,p}) \cdot q^{\uparrow}_{O, p} + (R_G - C^{\uparrow}_{G,p}) \cdot  q^{\uparrow}_{G, p} 
- C^{\uparrow}_{L,p}  - C^{\uparrow}_{W,p} \cdot q^{\uparrow}_{W, p}
\right]  
- \sum_{i=1}^{N^{\downarrow}_W} C^{\downarrow}_{W,j} \cdot q^{\downarrow}_{W, i} 
- \sum_{j=1}^{N^{\downarrow}_G} C^{\downarrow}_{G,j} \cdot q^{\downarrow}_{G, j}


LaTeX Math Block
anchor427RB
alignmentleft
G(t) = \sum_{p=1}^{N^{\uparrow}_P} \left[ 
\left[  (R_O -  C^{\uparrow}_{O,p}) + (R_G - C^{\uparrow}_{G,p}) \cdot  Y_{g,p} \right]  \cdot q^{\uparrow}_{O, p} 
- C^{\uparrow}_{L,p}  - C^{\uparrow}_{W,p} \cdot Y_{w,p} \cdot q^{\uparrow}_{L, p}
\right]  
- \sum_{i=1}^{N^{\downarrow}_W} C^{\downarrow}_{W,j} \cdot q^{\downarrow}_{W, i} 
- \sum_{j=1}^{N^{\downarrow}_G} C^{\downarrow}_{G,j} \cdot q^{\downarrow}_{G, j}


LaTeX Math Block
anchor427RB
alignmentleft
G(t) = \sum_{p=1}^{N^{\uparrow}_P} \left[ 
\left[  (R_O -  C^{\uparrow}_{O,p}) + (R_G - C^{\uparrow}_{G,p}) \cdot  Y_{g,p} \right]  \cdot (1- Y_{w,p}) 
- C^{\uparrow}_{L,p} - C^{\uparrow}_{W,p} \cdot Y_{w,p} 
\right]  \cdot q^{\uparrow}_{L, p}
- \sum_{i=1}^{N^{\downarrow}_W} C^{\downarrow}_{W,j} \cdot q^{\downarrow}_{W, i} 
- \sum_{j=1}^{N^{\downarrow}_G} C^{\downarrow}_{G,j} \cdot q^{\downarrow}_{G, j}

Translating 

LaTeX Math Inline
bodyq^{\downarrow}_{W, i}
 and 
LaTeX Math Inline
bodyq^{\downarrow}_{G, j}
 to Sandface flowrates 
LaTeX Math Inline
bodyq^{\downarrow}_{w, i}
 and 
LaTeX Math Inline
bodyq^{\downarrow}_{g, j}
 with formation volume factor and substituting liquid production rate 
LaTeX Math Inline
bodyq^{\uparrow}_{L, p}
 from 
LaTeX Math Block Reference
anchorqL
pageLiquid production rate
 one arrives to:

LaTeX Math Block
anchor427RB
alignmentleft
G(t) = \sum_{p=1}^{N^{\uparrow}_P}  \frac{\left[  (R_O -  C^{\uparrow}_{O,p}) + (R_G - C^{\uparrow}_{G,p}) \cdot  Y_{g,p} \right]  \cdot (1- Y_{w,p}) 
- C^{\uparrow}_{L,p} - C^{\uparrow}_{W,p} \cdot Y_{w,p} }
{B_w Y_{w,p} + \left[ (B_o - R_s B_g) + (B_g - R_v B_o) \, Y_{g,p} \right] \cdot (1-Y_{w,p})}
 
 \cdot q^{\uparrow}_{t, p}
- \sum_{i=1}^{N^{\downarrow}_W} C^{\downarrow}_{W,j} \cdot B_w \cdot q^{\downarrow}_{w, i} 
- \sum_{j=1}^{N^{\downarrow}_G} C^{\downarrow}_{G,j} \cdot B_g \cdot q^{\downarrow}_{g, j}

which is equivalent to 

LaTeX Math Block Reference
anchorG_sf
.


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