Abstract:

Well Degu 2 is located in construction of Bixue Dian in Dezhou sag of Linqing expression，Shengli oilfield. Analysis of inclusion show that the time which oil&gas enter into trap of well Degu 2 is at the period of sedimentation in Shashan Member-Guantao Formation. Analysis of gas component show that oil
&gas begin to migration in the period of low mature and mature for source rock, and accumulate to trap of well Degu 2. Gas in hydrocarbon is mainly from the crack gas of early kerogen in Ⅲtype kerogen. The character of coal-genetic gas is low mature based on the analysis of carbon isotope in gas. Maturity of gas is about 0. 8% so on. Reservoir in Carboniferouse-Permian and Ordovician is bad, coal-bearing seam in Carbonniferouse-Permian have a poor capacity of hydrocarbon-generating, poor capacity of hydrocarbon-generating and migration of Carbonifer-ouse-Permian is mainly reason of failure for the exploration well Dey 2.

Key words: well Degu 2, Linqing expression, analysis onreservoir formation