Download CLEAN: CO2 Large-Scale Enhanced Gas Recovery in the Altmark by Michael Kühn, Ute Münch PDF

By Michael Kühn, Ute Münch

The undertaking fresh (CO2 Large-Scale superior gasoline restoration within the Altmark common gasoline box) offers website particular wisdom for a possible destiny pilot venture. This contributed quantity offers an summary and outcome of the complete venture that's finalized to the top of 2012.

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Additional resources for CLEAN: CO2 Large-Scale Enhanced Gas Recovery in the Altmark Natural Gas Field - GEOTECHNOLOGIEN Science Report No. 19

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Phases D and E illustrate how the heavy mud was partially replaced with a lighter salt brine and nitrogen to decrease the hydrostatic pressure on the exposed rock salt around the reamed window so as to initiate the natural creep deformation process, responsible for the time dependent borehole convergence and the consequential formation of the compacted salt plug. Some measurements were periodically conducted in the wellbore to determine the rate of convergence, by calculating the volumes of displaced solids and brine in relation to the initial volume of the reamed window.

In the case of high reservoir pressure of 30 MPa (300 bar), only the good cementation guarantees acceptable closure of the system whereas poor and bad cementation require repair by polymer injection, the failed cementation by squeezing with powder cement or polymer gels. M. Reinicke et al. Fig. 10 ECLIPSE Model of vertical CO2 migration – scenarios for direct leakage from the well into the atmosphere (left) and into an overlying aquifer (right) Fig. 3 CO2 Migration Scenarios Coupling of the former model of cement annuli with a model of CO2 accumulation above the reservoir, assuming either a direct migration into the atmosphere or – more realistic – a temporary capture of CO2 within an overlying aquifer – a migration model as shown in Fig.

BOCO was used for the process simulation of CO2 gas injection into a well of the pilot site. M. Reinicke et al. Gradient –1500 Pressure after 700 d –2000 700 d –2500 100 d 10 d –3000 2d –3500 30 35 40 45 50 55 60 Pressure [bar] Fig. 13 Pressure–temperature cross section in the well of the pilot site, computed with BOCO An example of a “cold” gas injection is given in Fig. 13. 5 MPa in order to ensure no phase transition and to minimize the amount of energy required at the surface plant for re-heating of the liquid CO2 (delivered by trucks in liquid state).

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