LONDON (Alliance News) - Oil & gas producer Amerisur Resources PLC on Tuesday reported progress made at its operations in Colombia and said the results from its work programme should provide a platform for future growth.
Amerisur said in the infill well at Platanillo-8 in the Putumayo basin has been drilled to a total depth of 8,719 feet on Pad 5S and a 7-inch casing has been run and successfully cemented. Schlumberger electric logs indicate the well encountered oil columns in the upper U, lower U and T sands, with "excellent reservoir quality", although the N sand was not well developed at this position, as predicted.
In the U sand, total net pay of 27 feet is estimated, with an oil water contact in the lower part of the lower U sand, Amerisur said. The T sand reservoir exhibits 14 feet of net pay within "excellent quality" reservoir with no OWC shown on the logs, for a total of 41 feet of net pay.
Amerisur said it intends to test the T sand followed by a long-term test of that interval, to further enhance the understanding of the reservoir.
The well was drilled ahead of schedule, reaching total depth in 15 days compared to the planned 21 days due to operational enhancements and "excellent operational performance", Amerisur said.
Once the Serinco D-10 drilling rig is released from Pad 5S, it will be mobilised to Pad-2N to drill the first of up to two step out wells in the north of the Platanillo field. The workover rig Serinco D-6 will also be mobilised to perform the workover of Platanillo-20.
Meanwhile, at the Llanos basin, the electrical submersible pump initially installed in the well Loto-1 has now been function tested and was found to be in good operating condition, Amerisur said. Consequently, a workover to replace the ESP will not be necessary. Surface facilities are currently being installed to perform the 30 day test of the Mirador L4 interval of the well.
Amerisur and its partner, ONGC Videsh Ltd have defined the location for two exploratory wells within the North West 3D seismic data grid in this block. Both wells are planned to be drilled back to back in the latter part of the year into 2017.
"I am pleased to report the successful drilling of Platanillo-8, after a hiatus of almost 18 months of drilling activities. Operational performance has been outstanding, with important enhancements that we can apply going forward. We expect to drill, complete and test the well for a total of USD3.5 million, a significant saving over previous wells," Chief Executive John Wardle said in a statement.
"Strong progress continues to be made across the rest of the portfolio and we have an active work programme in place in the second half of the year which includes the acquisition of 2D seismic at Put-12, the workover of Platanillo-20, the first of up to two step out wells in the north of the Platanillo field and the commencement of drilling operations for two exploratory wells at CPO-5," he added.
By Karolina Kaminska; karolinakaminska@alliancenews.com @KarolinaAllNews
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