Abstract: Based on the in situ combustion technique and its application condition from abroad，this paper summerizes the experiences of field test of in situ combustion in northwest margin of Junggar basin.It is considered that sufficient conditions have provided here to develop this technique.Having analyzed the development situation and research condition of enhanced oil recovery tests of each oilfield in northwest margin of Junggar basin, this paper points out that it is necessary to develop this technique.It not only has extensively application prospect，but also has important significance in maintaining production to increase continously and obtaining huge economic benefit.

Key words: Junggar basin, Karamay oilfield, In situ combustion, Recovery factor