Well done to those in Block1 Apr 2019 10:04
A great rns with decent detail including time frames which FRR often failed to report. Our RNSs were covered with ambiguity as we had no idea how long the flowed for. Block reflects poorly on FRR from the ops point of view given how many wells we’ve drilled in the last couple of years versus testing flow rates but it reflects well from a potential point of view.
From block -
The well is completed in a horizontal section, 522 metres long, in the Middle Eocene formation with a 4 1/2 inch slotted liner. It was opened on 26 March 2019 and, after a short period of swabbing, began flowing naturally, producing a combination of oil and returned drilling fluid at average rates of 1,500 bbl/d through a 1/4 inch choke. During the initial six hour clean-up phase stable wellhead flowing pressures of 500 to 550 psig were observed.
The formal testing programme was started on 30 March 2019, after downhole pressure recorders had been installed, with a six hour flow period on a (5) /(64) inch choke. After a 12.5 hour shut-in period the well was flowed for 11 hours on an 1/8 inch choke. The flow, limited by the capacity of the testing facilities, quickly stabilised to a rate of 1,100 bbl/d through the 27/8 inch tubing with a well head flowing pressure of 590 psig. The well is now shut in for a 72 hour period. On recovery of the downhole gauges pressure transient analysis will be performed and reported by RNS.
Following the current build-up phase the well will be placed on production using the field's existing test facilities, and the oil trucked to a nearby oil storage facility where it will be stored until sale. The initial production rate will be based on the analysis of the production and pressure build-up tests.