5.Because of the special petroleum geology conditions in China, presently provedreserves were mainly found in Mesozoic Cenozoic strata in the eastern region and were mainly in structural pools.
6.Up to 60%~70% oil and gas provedreserves is in low permeability formation in recent exploration with 5000 X 1012m3of gas, and most of gas reserves are located in Tarim and Erdos Basin , which are the main resource of "west gas to east" project.
7.The municipality has 49 kinds of minerals with provedreserves and 218 mineral deposits, and the main minerals include coal, lead, zinc, copper, iron, tungsten, antimony, cement limestone and granite, of which 35 kinds rank top three and 23 kinds top one in the Province.
8.All of them have the tectonecs condition and the geochenical condition for multi-set oil and gas source polymerization and enrichment of oil and gas biogenesis and abiogenesis,they accumulate proved oil and gas reserves more than 98%, the prospectives is global total resources more than 98% also.