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qt2qtfrac{ - B_g \, R_s}{1-R_v \, R_s} \cdot q_O +\frac{B_g - B_o \, R_v}{1-R_v \, R_s} \cdot q_G + B_w \cdot q_WThe total rho2s_o
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anchorqO
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q_O = \frac { q_o/B_o + R_v \cdot q_g/B_g } {1 - R_s R_v}
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anchorqG
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q_G =\frac{q_g/B_g + R_s \cdot q_o/B_o}{1-R_s R_v}
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anchorqW
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q_W =  \frac{q_w}{B_w}
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anchorqL
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q_L =  q_O + q_W
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anchorq_o
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q_o = B_o \cdot ( q_O - R_v \, q_G)
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anchorq_g
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q_g = B_g \cdot ( q_G - R_s \, q_O)
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anchorq_w
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q_w = B_w \cdot q_W
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anchorqt
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q_t = q_o + q_g + q_w
In-situ oil-cut:


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anchorms_O1o
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\dot m_Os_o = \rho_O \cdot q_O
q_o/q_t
In-situ gas-cut:


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anchorms_G1g
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\dot m_Gs_g = \rho_G \cdot q_G
q_g/q_t
In-situ water-cut:


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anchorms_W1w
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\dot m_Ws_w = \rho_W \cdot q_w/q_W
t
\dot m = \dot m_O + \dot m_G + \dot m_W
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anchorm_tSURFs
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s_o+s_g+s_w = 1

Surface oil mass rate: 

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anchorm_oO1
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\dot m_oO = \rho_O \cdot q_o/B_oO
Surface gas mass rate: 


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anchorm_G1
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\dot m_G = \rho_OG \cdot (q_O - R_v \, q_G))

Surface gas mass rate: 


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anchorm_gW1
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\dot m_gW = \rho_GW \cdot q_g/B_g = \rho_O \cdot (q_G - R_s \, q_O)W
Surface total fluid mass rate: 


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anchorm_wtSURF
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\dot m_w = \rho_W \cdot q_w/B_w
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anchorm_tSUB
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\dot m = \dot m_o_O + \dot m_gG + \dot m_w W 
In-situ oil mass rate:


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anchorrhom_o
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\rhodot m_o = \rho_O \cdot q_o/B_o = \rho_O \cdot (q_O - R_v \, q_G))
In-situ gas mass rate:


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anchorm
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anchorrho_g
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\rhodot m_g = \rho_G \cdot q_g/B_g = \rho_O \cdot (q_G - R_s \, q_O)
In-situ water mass rate:


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anchorrhom_w
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\rhodot m_w = \rho_W \cdot q_w/B_w
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In-situ total fluid mass rate:


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anchorm_tSUBanchorrho_t
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\rho_t =\dot m = \dot m_o + \dot m_g + \dot m/q_t_w 
In-situ oil density:


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rho_o
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\rho_
o = \
rho_O/B_o
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anchorqt3
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q_t = \frac{B_o - B_g \, R_s}{1-R_v \, R_s } \cdot \frac{\dot m_O }{\rho_O}

+\frac{B_g - B_o \, R_v}{1-R_v \, R_s } \cdot \frac{\dot m_G }{\rho_G}

+ B_w\cdot \frac{\dot m_W}{\rho_W}
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anchorqt2
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\rho = \frac{\dot m}{q_t} = \frac{\dot m_O + \dot m_G + \dot m_G}{
\frac{B_o - B_g \, R_s}{1-R_v \, R_s } \cdot \frac{\dot m_O }{\rho_O}

+\frac{B_g - B_o \, R_v}{1-R_v \, R_s } \cdot \frac{\dot m_G }{\rho_G}

+ B_w\cdot \frac{\dot m_W}{\rho_W}
}

In-situ oil-cut:

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anchorso
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s_o = \frac{q_o}{q_t} = \frac{ B_o \, (q_O - R_v \, q_G)}{(B_o - B_g \, R_s) \, q_O + (Bg - B_o \, R_v) \, q_G + B_w \, (1- R_v \, R_s) \, q_W }

In-situ gas-cut:

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anchorso
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s_g = \frac{q_g}{q_t} = \frac{ B_g \, (q_G - R_s \, q_O)}{(B_o - B_g \, R_s) \, q_O + (Bg - B_o \, R_v) \, q_G + B_w \, (1- R_v \, R_s) \, q_W }

In-situ water-cut:

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anchorso
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s_w = \frac{q_w}{q_t} = \frac{ B_w \, (1- R_v \, R_s) \, q_W}{(B_o - B_g \, R_s) \, q_O + (Bg - B_o \, R_v) \, q_G + B_w \, (1- R_v \, R_s) \, q_W }
In-situ gas density:


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anchorrho_g
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\rho_g = \rho_G/B_g
In-situ water density:


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anchorrho_w
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\rho_w = \rho_W/B_w
Total 
fluid density:
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rho_t
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\rho_t = 
\dot m/q_t

Total 

, \rho_o + s_g \, \rho_g + s_w \, \rho_w

The total fluid compressibility:

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anchorc
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c = s_o \, c_o + s_g \, c_g + s_w \, c_w 

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