●Preface
Natural Gas Geology
Gas Pores in Coal Measures and Their Significance in Gas Exploration 3
Ordovician Gas Accumulations in Eastern China 7
Formation of the Central-Asia Coal-formed Gas Accumulation Domain and Its Source Rocks 16
Characteristics of Coal-formed Gas Accumulation Belts in the East Part of the Central-Asia Coal-formed Gas Accumulation Domain 27
Synopsis on Achievements in National Scientific Key Research Project on Natural Gas in“the Eighth Five-Year Plan” 39
The Main Controlling Factors for the Formation of Medium-giant Gas Fields in China 50
Geological Research Promotes Gas Exploration in China 60
An Initial Discussion on Major Controlling Factors on Formation of Coal-formed Largemedium Gas Fields 66
Geology of Giant Gas Fields in China 80
Significances of Studies on Natural Gas Geology and Geochemistry for Natural Gas Industry in China 101
Major Developments of Coal-formed Gas Exploration in the Last 30 Years in China 126
Natural Gas Accumulation in Eastern China 149
Tight Gas in China and Its Significance in Exploration and Exploitation 180
Geological and Geochemical Characteristics of Large Gas Fields in China 193
Exploration and Development of L Gas Fields in China since 2000 215
Natural Gas Geochemistry
Composition， Carbon Isotope Characteristics and the Origin of Coal-bed Gases in China and Their Implications 229
A Study of the Compostion of Carbon and Hydrogen Isotopes and Its Significance in the Migration of Oil and Gas 244
Compostion Characteristics and Origin of Carbon Isotope of Liuhuangtang Natural Gas in Tengchong County，Yunnan Province 251
Characteristics of Carbon Isotopes of Organic Alkane Gases in Petroliferous Basins of China 254
Identification and Distinction of Various Alkane Gases 266
Mantle Genetic Natural Gas in Wudalianchi Volcanic Region 278
Characteristics of Carbon Isotopes of Alkane Components and Identification Marks of Biogenic Gases in China 284
Geochemical Characteristics， Carbon and Helium Isotopic Compositions of Natural Gas from Hot Springs of Some Areas in China 295
A Study on Carbon Isotopes of C5–8 Light Hydrocarbon Monomeric Series of Natural Gas in Main Oil-and Gas-bearing Basins in China 305
Geochemical Characteristics of the Coal-formed Gases in the East of the Central-Asia Coal-formed Gas Accumulation Domain 310
CO2 Gas Fields (Pools) and Genetic Types in the Coastal and Continental Shelf Areas in Eastern China 319
Geochemistry and Accumulation of Carbon Dioxide Gases in China 345
Origins of Partially Reversed Alkane δ 13C Values for Biogenic Gases in China 358
Stable Carbon Isotope Compositions and Source Rock Geochemistry of the Giant Gas Accumulations in the Ordos Basin， China 368
Geochemistry and Occurrence of Inorganic Gas Accumulations in Chinese Sedimentary Basins 391
Geochemical Characteristics of Natural Gas at Giant Accumulations in China 420
Discrimination of Abiogenic and Biogenic Alkane Gases 437
Stable Carbon Isotopes of Alkane Gases from the Xujiahe Coal Measures and Implication for Gas-source Correlation in the Sichuan Basin， SW China 456
Carbon Isotopes of Middle-Lower Jurassic Coal-derived Alkane Gases from the Major Basins of Northwestern China 472
Geochemical Characteristics of Natural Gas from Mud Volcanoes in the Southern Junggar Basin 494
Stable Carbon and Hydrogen Isotopes of Natural Gases Sourced from the Xujiahe Formation in the Sichuan Basin， China 513
Inter-laboratory Calibration of Natural Gas Round Robins for δ 2H and δ 13C Using Off-line and On-line Techniques 529
Discussion on the Gas Source of the Triassic Xujiahe Formation Tight Sandstone Gas Reservoirs in Yuanba and Tongnanba， Sichuan Basin: An answer to Yin Feng et al. 543
Stable Carbon and Hydrogen Isotopes of Gases from the Large Tight Gas Fields in China 555
Genetic Types of the Alkane Gases in Giant Gas Fields with Proven Reserves over 1000×108 m3 in China 580
Geochemistry of the Extremely High Thermal Maturity Longmaxi Shale Gas， Southern Sichuan Basin 598
Stable Carbon Isotopes of Coal-derived Gases Sourced from the Mesozoic Coal Measures in China 614