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This book focuses on the latest progress in unconventional oil and gas (such as coalbed methane, shale gas, tight gas, heavy oil, hydrate, etc.) exploration and development, including reservoir characterization, gas origin and storage, accumulation geology, hydrocarbon generation evolution, fracturing technology, enhanced oil recovery, etc. Some new methods are proposed to improve the gas extraction in coal seams, characterize the relative permeability of reservoirs, improve the heat control effect of hydrate-bearing sediment, improve the development efficiency of heavy oil, increase fracturing effectiveness in tight reservoirs, etc.

Research & information: general --- genesis of coalbed methane --- pore-fracture system --- storage and seepage space --- Baode block --- shale gas --- flowback --- big-data analysis --- horizontal well --- fracturing fluids --- Ordos Basin --- low-permeability tight sandstone gas reservoir --- multistage fracturing --- comprehensive productivity impact index --- Junggar Basin --- Jimsar Depression --- shale oil --- thermal simulation --- source rock evaluation --- hydrocarbon generation evolution --- different CBM geology --- middle and high rank coal --- tectonism and sedimentation --- enrichment and high yield model --- exploration and development strategy --- low-rank coal --- biogenic methane --- geological factor --- accumulation --- production --- gas extraction --- overburden movement --- expansion deformation --- effective pressure relief range --- relative permeability --- high waterflooding PVs --- numerical simulation --- physical simulation --- microencapsulated phase-change materials --- heat control --- temperature sensitivity --- cementing --- hydration heat --- natural gas hydrate-bearing sediment --- heavy oil --- nonhydrocarbon gas --- steam flooding --- reservoir adaptability --- Huaibei coalfield --- tectonic evolution --- gas occurrence --- multiple-level tectonic control --- coalbed methane --- sandstone --- permeability --- pore characteristics --- permeability stress sensitivity --- Jixi Basin