Friday 7 December 2018

Through utilisation of the PWC® (Perforate, Wash & Cement) plug and abandonment method (P&A) on the Valhall field, HydraWell has contributed towards Aker BP executing its plugging programme significantly quicker than planned.

Since May 2017, HydraWell has contributed towards plugging 10 shut-in wells on the original drilling platform (DP) at the Valhall field centre.

Compared to the first P&A phase on the DP platform from 2014 to 2016, Aker BP has reduced the average time per well by 50 percent in the latest phase, despite a rise in the complexity of the wells towards the end of the campaign.

Plugging wells on the DP platform is a key part of the work to modernise the Valhall field centre. The three original platforms from when the field started producing in 1982 – QP, DP and PCP – will be removed. Four wells remain to be permanently plugged prior to the removal of the DP platform.

HydraWell’s HydraHemeraTM PWC® system perforates the well before washing the casing and then setting the cement plug – a so-called rock-to-rock barrier that is required under the Norsok standard. Through this method a rock-to-rock barrier can be installed in less than two days. The technology can be utilised on both single and dual casing wells.