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Figure 8. Map showing the three groups of gas fields in Sichuan Basin, the second leading gas-producing onshore Chinese basin. Representative fields are: 1. Dukouhe; 2. Luojiazhai; 3. Tieshanpo; 4. Jinghuping; 1-4 with Feixianguan oolitic limestone as reservoir; 5. Shaping; 6. Yunhezhai; 7. Shuangjiaba; 8. Longmen; 9. Wubaiti; 5-9 with Carboniferous limestone as reservoir; 10. Sumatou; 11. Sanhuangmiao; 12. Biamamiao; 13. Guanyinsi; 11-13 with Jurassic sandstone as reservoir.