Table 4 Cost model for capital expenditure

Planning

Feasibility study, €

180,000

acquisition and analysis of existing information, €

500,000

Energy concept, €

100,000

Permits, expert opinions, €

150,000

Drilling

Site, construction reconditioning, €

300,000

Lifetime

Rigup, €

250,000

Drilling expenditure, €

\(1.198 \cdot {e}^{0.0004354\cdot {z}_{\mathrm{MD}}}\cdot {V}_{\mathrm{Well}}/{V}_{\mathrm{Ref}.\mathrm{Well}}{\cdot 10}^{6}\)

Logging, €/m

65

Production/circulation test, €

450,000/350,000

Stimulation, €

600,000

Production and injection equipment

Production pump, €

\({P}_{\mathrm{Hydr}}\cdot \left(M\cdot {P}_{\mathrm{Hydr}}^{-0.319}\right)\), where \({P}_{\mathrm{Hydr}}=\mathrm{NPF}\cdot \dot{V}\cdot \Delta p\)

4

Pump Installation, €

\(5000 \left[ {euro /{\text{d}}} \right] \cdot \left( {\frac{{{\text{Setting}}\_{\text{depth}} \left[ {\text{m}} \right]}}{{250 \left[ {{\text{m}}/{\text{d}}} \right]}} + 4} \right) + 10{,}000\left[ euro \right]\)

Completion excl. pump, €

\(L\left[\mathrm{m}\right]\cdot \left\{80+\left(0.0215\cdot {P}_{\mathrm{Hydr}}+77\right)\right\}\)

Injection pump, €

\(0.8\cdot \left[1500\cdot {{P}_{\mathrm{Cap}\_\mathrm{inj}}}^{0.48} \left(1.89+1.35\cdot \mathrm{FM}\cdot {10}^{(-0.3935+0.3957{\cdot \mathrm{log}}_{10}\left(p\right)-0.00226\cdot {\mathrm{log}}_{10}{\left(p\right)}^{2}}\right)\right]\),

where \({P}_{\mathrm{Cap}\_\mathrm{inj}}=\mathrm{NPF}\cdot \dot{V}\cdot \frac{\Delta p}{{\eta }_{\mathrm{Motor}}{\cdot \eta }_{\mathrm{Isentropic}}}\) and p = operating pressure in barue

10

Thermal water system incl. heat exchanger

Surface piping incl. fittings, €/m

\({\text{Capex}}_{{{\text{Pipe}}\_p_{15} }} \left[ {euro /{\text{m}}} \right] = M1 \cdot \dot{V}\left[ {{\text{m}}^{3} /{\text{s}}} \right] + M2\)

\({\text{Capex}}_{{{\text{Pipe}}}} \left[ {euro /{\text{m}}} \right] = {\text{Capex}}_{{{\text{Pipe}}\_p_{15} }} \cdot\left[ {1 + \alpha \cdot\left( {p - p_{15} } \right)} \right]\)

Lifetime

Pressure vessel, €

\({\mathrm{Capex}}_{{p}_{15} }={10}^{\left(3.4974+0.4485{\cdot \mathrm{log}}_{10}\left(V\right)+0.1074\cdot {\mathrm{log}}_{10}{\left(V\right)}^{2}\right)}\)

\(\mathrm{Capex}={\mathrm{Capex}}_{15}\cdot \left[2.25+1.82\cdot \mathrm{FM}\cdot \mathrm{FP}\right]\)

FP = \(\left(\frac{p\cdot d}{2\cdot \left(850-0.6\cdot p\right)}+0.00315\right)/0.0063\) with p = operating pressure in barue

Lifetime

Shell-and-tube heat exchanger, €

\(1300\cdot {A}^{0.66}\cdot \left(1.63+1.66\cdot FM\cdot {10}^{(0.03881-0.11272{\cdot log}_{10}\left(p\right)+0.08183\cdot {log}_{10}{\left(p\right)}^{2}}\right)\)

with \(A\left[{\mathrm{m}}^{2}\right]=\frac{{P}_{\mathrm{th}}}{{\dot{q}}_{W}\cdot \Delta {T}_{\mathrm{log}}}\cdot \mathrm{NPF}\) and \(\Delta {T}_{\mathrm{log}}\left[K\right]=\frac{\Delta {T}_{\mathrm{max}}-\Delta {T}_{\mathrm{min}}}{\mathrm{ln}\frac{{\Delta T}_{\mathrm{max}}}{{\Delta T}_{\mathrm{min}}}}\)

10

Peak load and redundancy boiler, €

\(\mathrm{FM}\cdot 1150\cdot {\left({\mathrm{NPF}\cdot P}_{\mathrm{gt}}/{\mathrm{Share}}_{\mathrm{gt}}\right)}^{0.56}\)

20

Other capital expenditure

Project management

8% of Capex for drilling/surface facilities

Insurance

3.5/0.5% of Capex for drilling/surface facilities

Seismic monitoring, €

150,000

Public relations, €

400,000