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

By Michael Kühn, Ute Münch

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

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

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In phase F, the upper bridge is installed, which together with the lower bridge plug serves as abutment to enhance the tendency for recrystallization of the rock salt grain structure in the course of the coming years. Migration of fluids from the formations below and above along the salt plug is prevented by the cement bridges functioning as geotechnical barriers. Under the existing HTHP conditions at the wellbore site, the geotechnical barriers (cement and bridge plugs) will integrally and effectively function until the geologic barrier (the compacted, crystallized salt plug) has been established in the course of several years.

100 Packer Reservoir Tubing Cement Annulus Casing Annulus Fig. 8 Simulation model of CO2 migration through the cemented well annulus Fig. 9 Simulation of wellhead pressure development for various cementation qualities at 3 and 30 MPa initial reservoir pressure At a low reservoir pressure of 3 MPa (30 bar) – as it is the case for the pilot field – a bad or failed cementation can be detected by annulus pressure build up with the conclusion of necessary intervention by cement repair. 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.

1983) and Hou et al. (2010b). The creep parameter sets for rock salt with the upper and lower stationary creep rate boundary are partially based on the experimental results of creep tests on salt samples from the Altmark gas field and partially on the above mentioned literatures. 3 Well Integrity 43 Fig. 1 Numerical Simulation with a Backfill Prior to the execution of the field test numerical simulations, as pre-calculations for creep induced compaction in crushed salt, were performed under application of the CWIPP constitutive model in Sjaardema and Krieg (1987) as a cost-effective method to predict the time period of backfill density alignment with the surrounding rock salt.

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