D26 LEAN GAS INJECTION INTO AN EXTRA LIGHT OIL RESERVOIR- INITIAL RESULTS AND FURTHER STEPS Abstract 1 The Tisza-1 reservoir is situated at the top of the SE part of Algyo field Hungary. The 1700 m depth reservoir has been developed in the uppermost sandstone series showing good reservoir quality. The well sortiered middle and coarse grain sandstone contains extra light crude: the reservoir volume factor is near 4 0 res.bbl/bbl and the oil quality is 63 API. The extreme characteristics of the reservoir oil mean that the intermediate content is above 34 mol%. The production started as early as