The natural gases in Turpan-Hami Basin can be divided into 4 genetic types:oil-type gas

coal-formed gas

mixture source gas and biological remaking gas.Oil-type gas is mainly distributed in Tuokexun and Hami Sags

and characterized by high δ

13

C

3

-δ

13

C

2

high maturity

δ

13

C

2

<

-2.88%;coal formed gas is enriched in Taibei Sag

and characterized by low δ

13

C

1

high δ

13

C

2

δ

13

C

3

ratios

δ

13

C

2

>

-2.88% et. al.;mixture source gas is distributed in Taibei Sag

Shanshan Oilfields and eastern Qiuling Oilfields

characterized by δ

13

C

1

<

δ

13

C

2

<

δ

13

C

3

>

δ

13

C

4

“reverse”carbon isotopic;biological remaking gas is distributed only in Baha Oilfields and Ling 4 well area in Qiuling Oilfields in Taibei Sag

and characterized by low density

big dry coefficient

high ratios of iC

4

/nC

4

C

2

/C

3

and

3

He/

4

He of

δ

13

C

2

>

δ

13

C

3

et. al..