Essar Oil begins production testing at block CB-ON/3 Vol 9, PW 18 (15 Dec 05) Exploration & Production Essar Oil has begun production testing at onland Gujarat exploration block CB-ON/3 where it is operator with 100%. ... Buy this article forRs590 $9 For a 30-article or annual subscription rates click here RelatedEssar needs 40-tonne workover rig (21 May 20) Oil India sees 'good gas flow' at KG well (24 Jan 19) Essar can't develop CB-ON/3 without ONGC (25 Mar 10) Essar finds 'traces of oil' at CB-ON/3 well (04 Sep 08) First CBM production from Essar block in two months (20 Mar 08) Essar Oil begins production testing at block CB-ON/3 (15 Dec 05) Essar Oil begins CBM exploration at Raniganj (01 Dec 05) Essar makes oil and gas discoveries at CB-ON/3 (14 Jul 05) Essar Oil to drill one well at RJ-ON-90/5 (08 Oct 03) Essar estimates 250m barrels in place at RJ-ON-90/5 (05 Dec 01)