Three reservoir sections have been drilled and completed using cesium / potassium formate brine in the Kvitebjørn field since 2007. The reservoir sections were drilled using MPD technology with a specially designed drilling fluid. A 'designer mud' based on low ECD cesium / potassium formate brine was found to give the best performance. Download your copy of the full case summary to learn more.

  

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Nine reservoir sections were drilled and seven completed with cesium/potassium formate brine in the North Sea's Kvitebjørn field from 2004 to 2007. Per Cato Berg, Lead Drilling Engineer for Kvitebjørn, says: “Supported by our tests and data, we feel that cesium formate gives the best productivity for the wells. We have tested formation damage with water- and oil-based alternatives, and cesium formate comes out best.” 

 

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Six reservoir sections were drilled and completed with cesium / potassium formate brine in the HPHT Huldra field in the North Sea. Statoil has reported that the six Huldra wells drilled and completed with formate brines are each producing with excellent average productivity indices of around 1.9 million scf/day/psi. The Huldra project manager says: “For the specific conditions of the Huldra field there is no realistic fluid alternative for successfully drilling and completing the wells.”

 

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Deploying 2.19 s.g. / 18.28 ppg cesium formate brine in HPHT perforating operations brings significant HSE benefits and delivers productive wells with low mechanical skins. The BP-operated Rhum field in the North Sea consists of three subsea development wells tied back to the Bruce platform. The field offered a number of development challenges.

 

TXM successfully used high-density cesium formate brine as well control fluid during the appraisal of a extreme HPHT basin-centred gas accumulation in Hungary. The well was later suspended three times with cesium formate. The longest suspension period lasted about six months.

 

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