HHDL7 Oct 2020 09:26
The Horse Hill-2z (HH-2z) well was drilled and completed between September and November 2019. During well clean-up, formation water was produced to surface. A water-shut-off intervention was then completed. HH-2z well testing resumed via a combination of flow periods, with downhole pumping via a bespoke electric submersible pump, and pressure build-ups (PBUs) to assess oil volumes connected to the well.
Following initial high oil rates, HH-2z oil rates declined with continuing formation water production. The well is currently shut-in for a long-term PBU test. A number of options are being reviewed for the future use of HH-2z, including stimulation to return it into long-term production, sidetracking the well to a different subsurface location and possibly converting it into a future water re-injection well to implement pressure support and further reduce future operating costs (as foreseen in the Horse Hill FDP). The Company has also sought an extension to the current test permission In order to ensure that sufficient data is available to enable the correct decisions to be made.
In March 2020, the Oil and Gas Authority (OGA) awarded consent to the Field Development Plan (FDP) and permission to produce.
Post-period, the Company also plans a significant intervention in HH-1 specifically designed to further improve flow into the wellbore. Together with a full reperforation of the entire Portland section using a different type of perforating gun than prior operations, a new, simpler production tubing completion will be installed. The new completion will permit the downhole pump to be installed below the Portland interval to significantly improve pump efficiency.