Under CopyrightBloecher, GuidoGuidoBloecherRegenspurg, SimonaSimonaRegenspurgKranz, StefanStefanKranzNorden, BenBenNordenLipus, MartinMartinLipusReinsch, ThomasThomasReinschSiemon, RomyRomySiemonHenninges, JanJanHenningesOrenczuk, DominikaDominikaOrenczukZeilfelder, SarahSarahZeilfelderScheytt, TraugottTraugottScheyttSaadat, AliAliSaadat2023-04-132023-04-132022https://publica.fraunhofer.de/handle/publica/439680https://doi.org/10.24406/publica-122310.2139/ssrn.414122410.24406/publica-1223To analyse the potential of an ATES in the centre of Berlin, the ATES research well Gt BChb 1/2015 was hydraulically tested. A sandstone of the Exter Formation was chosen as target horizon. This aquifer is characterized by a temperature of 17 • C at a depth between 220 und 230 m below ground surface. Several hydraulic tests including Slug-Withdrawal Tests (SWTs), a Step-Rate-Test (SRT), production tests, and Push-Pull tracer Tests (PPTs) with hot and cold water were performed during 40 days of operation in 2017 to analyse the aquifer characteristics. These tests were accompanied by Distributed-Temperature-Sensing (DTS) monitoring which allows a continuous and spatial distributed temperature profiling in the well. The temperature measurements provide indications of injection areas based on the warmback period during a push-pull test with 90 • C hot water. Slug-withdraw tests were performed at the beginning and at the end of the test campaign to evaluate the changes of the hydraulic performance during testing and to compare the results to the conventional well-testing methods like production and step rate tests.enAquifer Thermal Energy Storage (ATES)push-pull teststep-rate testpaper