Oil & Gas Innovation OGI Winter 2018 Digital Version - Page 42

HEALTH & SAFETY Engie Gets Notice of Order Following Gjøa Gas Leak Investigation The Petroleum Safety Authority Norway (PSA) has completed its investigation of a condensate leak on the Gjøa field and has given a notice of order to Engie E&P Norge. The leak occurred in the process module on the Gjøa facility at 20.01 on 21 June. This incident led to gas detection, a general alarm, automatic shutdown of the process plant, pressure blowdown and mustering in accordance with the alarm instructions. E ngie has estimated the leak rate at 1.06kg/s and the total quantity leaked as about 1.25m³. Analyses show that the fluid consisted largely of produced water with small quantities of hydrocarbons in the form of gas and condensate. The condensate did not ignite during the incident. The leak was halted after about 30 minutes. The direct cause of the leak was a fatigue fracture in a weld on a ½-inch pipe nozzle installed on a condensate pump connected to the gas re- compression system. In connection with the emergency shutdown, it was registered that an emergency shutdown valve (ESV) upstream from the leak site failed to close. The emergency response command on the facility XYY]XX]H NH[H[ \H\H H\ۛ[ۈ\ ЊBYܙHH]XX][ۋH][ۈۈڰB\ܛX[\Y] K[][\Y][ۈوH[Y[ HB\[][Yx&\XZ[[[HوBT՜]\X]YXX]ܜ\¸'[ܙ\\[YZ[\]]BX\[ۈXYH\X[BY[][ۜ˸'BY[[Y\]X]K\H؛[\]HY[ۛۈݙ\Hۙ\[ ]X[] B[\Y][ۂ\šY[YYYۘۙܛZ]Y\HHY[][ۜ[B[\X\΂(H\Y\[H\Y\X[Y[Y[\[B(HX[Y[Y[[XZ[[[H\[B(H\ۙ[X][ۂ(Hܙ[\][ۈ[X[Y[Y[ [Y][ۋ[[\ݙ[Y[[\Y[Y[YYY[]Y΂(B\[[X[]]Y[X[ZX[˂ۈH\\وH[\Y][۸&\[[[YH\Y[][XHوH[›ܙ\\X[X[ۈ HوH[Y]ܚœY[][ۜۈYZ[\]]HX\[ۜYBX[ۈ HوHX[Y[Y[Y[][ۜ›ۈ\Y\[YH\ܙ\YZHBX\\HYX\\\[\H]Y]KBܚ]X[\]Z\Y[\\]Y \Y[XZ[Z[Y[H^HX[\\B\ܛX[HوH\Y\][[Y\ˈBXY[H܈\X[H]\ܙ\\] XX\H N H]\H[ܛYY[Hܙ\\Y[\YY] ^[][ۈوH\\8'ܙ\'H[8'XBوܙ\'B[ܙ\\[YZ[\]]HX\[ۈXYB\X[HY[][ۜˈYܙHHB\Y\[ܙ\][\[H[H8'XHقܙ\'HHYXY\[Y\˂HXHوܙ\\Z]\[[[Y[܂HXHو[[ۜ]H\[Hx&\˜YZ[\]]H\[X]\]Y\H\H\\HXX[\\ˈHXB\ۛHH\\YܙH[YZ[\]]BX\[ۈ\XYK[ܙ\\HۙH][]H[[Y[X\Y[H[[ۈHX\Y[ 8(