Echo Energy has reported positive well test results after a workover of the CSo-85 well in the Cañadon Salto field in its Fracción D asset, Argentina.

The well is operated under a joint venture between Echo and its Argentine partner Compañía General de Combustibles (CGC).

CSo-85 was subjected to an extended well test period, including 16 days of stabilised gas production and a 19-day period, during which pressure gauges were left in the wellbore to monitor the pressure build-up.

Echo encountered a maximum flow rate of 2.5mmscf/d at a tubing head pressure of 432psi.

“Echo and its partner, CGC, are working to establish a fully costed development plan.”

The company has now recovered the gauges and studied the data to determine the likely minimum connected volume to the CSo-85 wellbore.

Echo Energy CEO Fiona MacAulay said: “The extended testing of the Springhill C1 reservoir on the eastern flank of the Cañadon Salto field has provided us with some very positive data relating to the likely commerciality of the gas development of the field.

“Echo and its partner, CGC, are working to establish a fully costed development plan, including the pipeline and associated gas processing facilities, along with the timeline on which we could anticipate the development activities to commence.”

Based on the inferred radius of investigation from the test, the company noted that the well is in direct communication with around 4bcf of gas in the Springhill C1 reservoir.

According to the company, it may be possible to convert some, or all, of the currently classified gross best case prospective resources of 15.3bcf immediately to contingent resources.

The proposed conversion to reserves catergorisation would be taken after an agreement is reached to proceed with a development plan.

Echo has also highlighted that the deeper Springhill C3 reservoir has gross best case prospective resources of 11.6bcf.

The partners are evaluating the possibility of drilling an additional Tobifera gas well during the current campaign.

The well will target 18.8bcf of prospective resources.

If the well proves successful, it will pave way for an early decision for gas development at the Fracción D asset.