Petroleum Africa
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Wednesday, April 18, 2018
Anglo African Oil & Gas issued an update on its activities ongoing in the Republic of Congo (ROC) on the Tilapia field. The company saw the flow lines and all associated topside equipment to the TLP-101 well cleaned successfully. The flow lines were reassembled and are now ready to receive oil flow.
As the well was required to be shut down during the cleaning process, the company decided initially to bring the well back on line through the annulus as a test, rather than through the coiled tubing and flow lines which is the main production method on this well. It tested production for a period of five days via the annulus to compare flow against the previously restricted flow lines to provide a baseline prior to reverting back to the coiled tubing.
During this test period, TLP-101 produced between 80 bpd of oil through the annulus, which represented an increase in production of 120 per cent when compared to the flow-rate prior to the workover.
The well has now been temporarily closed to enable a shift back to producing through the coiled tubing and the newly cleaned flow lines. The company is performing a pressure build up before opening the choke and getting the well back into stabilized production. The company estimates this will take approximately five days. Anglo will make a further announcement regarding production levels from TLP-101 once the well has been fully brought back on line and flow tested through the production tubing.
At the TLP-02 well, Schlumberger conducted a successful intervention focused on the integrity of the perforations on the well. Anglo African believes that any near-wellbore formation damage has now been remedied by the introduction of acid and that as a result contact has been established with the reservoir. The well was produced to surface with the aid of nitrogen lift.
On the assumption that contact with the reservoir has now been successfully established, the company is now investigating the best method by which to produce from this well. This may include a further engineering solution, and the company has the relevant equipment available in its current inventory if required to complete this work.
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