5 Wang X Z, Zhang L X, Jiang C F, et al. Lacustrine shale gas exploration in Yanchang exploratory block. In: AAPG Annual Convention & Exhibition. Pittsburgh, 2013. 592-593
22 Waechter N B, Hampton G L, Shipps J C. Overview of coal and shale gas measurements: Field and laboratory procedures. In: International Coalbed Methane Symposium. Tuscaloosa: The University of Alabama, 2004
[10]
23 Hill D G, Nelson C R. Gas productive fractured shales: An overview and update. Gas Tips, 2000, 6: 4-13
[11]
24 Martini A M, Walter L M, Mclntosh J C. Identification of microbial and thermogenic gas components from Upper Devonian black shale cores, Illinois and Michigan basins. AAPG Bull, 2008, 92: 327-339
1 Martini A M, Walter L M, Budai J M, et al. Genetic and temporal relations between formation waters and biogenic methane: Upper Devonian Antrim Shale, Michigan Basin, USA. Geochim Cosmochim Acta, 1998, 62: 1699-1720
[14]
3 Hao F, Zou H Y, Lu Y C. Mechanisms of shale gas storage: Implications for shale gas exploration in China. AAPG Bull, 2013, 97: 1325-1346
19 Bertard C B, Bruyet B, Gunther J. Determination of desorbable gas concentration of coal (direct method). Int J Rock Mech Min Sci, 1970, 7: 43-65
[24]
20 Kissell F N, McCulloch C M, Elder C H. The Direct Method of Determining Methane Content of Coalbeds for Ventilation Design. Washington DC: U S Bureau of Mines, 1973
[25]
21 Diamond W P, Schatzel S J. Measuring the gas content of coal: A review. Int J Coal Geol, 1998, 35: 311-331
[26]
25 Str?po? D, Mastalerz M, Schimmelmann A, et al. Geochemical constraints on the origin and volume of gas in the New Albany Shale (Devonian-Mississippian), eastern Illinois Basin. AAPG Bull, 2010, 94: 1713-1740
27 Martini A M, Walter L M, Ku T C W, et al. Microbial production and modification of gases in sedimentary basins: A geochemical case study from a Devonian shale gas play, Michigan basin. AAPG Bull, 2003, 87: 1355-1375