Germany - gas storage

Description

VNG Gasspeicher GmbH as the customer (AG) is the operator of the Buchholz underground gas storage facility (hereinafter "UGS") southwest of Berlin. The storage facilities are located approx. 25 km southwest of the city of Potsdam in the state of Brandenburg, district of Potsdam-Mittelmark south or southwest of Beelitz near the towns of Salzbrunn and Buchholz. The AG has decided to permanently store and dismantle the UGS. For this purpose, the mining safekeeping (backfilling) of all boreholes and the dismantling of the associated underground and above-ground plant components are to be carried out. The UGS is currently in the process of extracting residual gas. In preparation for the mining safekeeping (backfilling), the AG carried out the necessary licensing procedure under mining law. The approval notice of the submitted final operating plan (ABP) has been received. For the detailed planning services and for the construction supervision, the AG bound ESK GmbH as the general planning company (GP). All currently available 25 wells (production and observation wells as well as one injection well) have been drilled vertically and have a final depth of between 300 m and 1,055 m. The drilling depths are between 300 m and 1,055 m. With the exception of the observation wells, the target horizon of the well was the sediments of the middle Buntsandstein. Within the scope of the construction project, 25 boreholes described below are to be retained for mining purposes and the following ancillary facilities are to be dismantled: - 8 operating probes, - 16 observation probes, - 1 injection probe, - installed underneath and- above-ground plant components on the probe sites. All 8 service boreholes and the injection borehole (Ug BzP 27) have a 60 m x 45 m (2 700 m ) probe site suitable for the storage measure. The access roads to the 9 probe sites are also sufficiently dimensioned and do not need to be extended prior to safekeeping. The remaining 16 observation wells have a probe site measuring 3 m x 3 m and 4 m x 6 m respectively. These squares are concreted and fenced. In preparation for the safekeeping of the boreholes, these sites must be temporarily extended to a size of 40 m x 60 m (2 400 m ), including the previous probe site, in order to obtain a suitable area for setting up the workover facility with the appropriate equipment (containers, etc.). The field pipe system comprises gas pipes (DN 150/PN 100 or DN 100/PN 100) as well as a brine and injection pipe (DN 60/PN 25) including accompanying cables and cable protection pipes. The probe line to the probe Ug BzP 1 is partly under a public road, a parking lot and the probe place. This part remains in the soil and is closed on both sides. The brine injection line from the stacking basin and the cable protection pipe from the stacking basin to the Ug BzP 27 probe run for the most part along the bank of the Nieplitz directly adjacent to an FFH area. - 2 probe routes with 7 probe lines, - 1 separate probe line, - electric and fiber optic cables in the probe field (probe ring) and KKS system, - 1 brine line to the OTA stacking basin, - brine pressing station with, pump station, container, ELT container, - 1 brine line from the OTA stacking basin to the pressing probe. Not subject of the construction project and of this tender is the dismantling of the buildings and the structural works within the premises of the UGS, as well as the existing 8 groundwater measuring points (level boreholes).

Opportunity closing date

07 February 2019

Value of contract

£5m-50m