Best ever KG flow rates brings smile back to GSPC

Vol 12, PW 5 (24 Jul 08) Exploration & Production
     

Until now all excitement at GSPC has focused on well KG#8, which reported the first discovery on eastern offshore block KG-OSN-2001/3.

Will that now change with results from three DSTs (Drill Stem Tests) at well KG#22 Quite possibly, yes. GSPC tells us well KG#22 sits on the same â€کfault block’ as well KG#19, where drilling was aborted after technical problems with semi-submersible Essar Wildcat.

“This is the best fault block at KG-OSN-2001/3,â€‌ we are told. “But water depths are beyond the capability of a jack-up.

â€‌ This so, Deep Driller-1 was â€کjacked down’ in 91 metres water depth and drilled KG#22 almost as a horizontal well - deviating more than 30 degrees to reach a measured depth of 6007 metres. Three DSTs were carried out but GSPC is particularly excited about the third test between 4652 and 4672 metres, which yielded 23.7m cf/d through a 28/64 inch choke and 84 b/d of condensate as well as 27.1m cf/d gas through a 32/64-inch choke and 95 b/d of condensate.

“These are the best-ever flow rates from any test on this block,â€‌ confirms GSPC. Adding to GSPC’s joy is that the flow rates from this DST resulted from a zone with estimated â€کnet pay’ of just 20 metres – much lower than â€کnet pay’ in the first two zones, where DSTs registered lower flow rates.

During the first DST â€کnet pay’ was 100 metres but the flow rate 1.2m cf/d only. During the second DST, â€کnet pay’ was 200 metres but the flow rate 3.4m cf/d and 4m cf/d only.

Not only this, GSPC was pleasantly surprised to discover that â€کbottom-hole’ pressure during the third DST was 10,000-psi and the temperature was 360-degrees Fahrenheit. “This is not a High Temperature High Pressure zone as we’ve encountered in the past,â€‌ adds GSPC.

Most important was the near absence of sand influx during testing, a major problem encountered in the past. “There was no sand influx at all during this test,â€‌ confirms GSPC.