Accumulation mode of Carboniferous-Permian coal-formed gas in Wen'an-Yangcun Slope

Based on the sedimentary composition,tectonic evolution and basin simulation technology,the Carboniferous-Permiar coal-formed gas accumulation mode in Wen'an-Yangcun Slope,Jihong Depression was anayzed.The resuis show ht the coal s ams and dak shaeof he Beni( ayan and Shanmi Fomalons costite vald soure oks The resevoi dsrtules in te Catonferu-Permian clstit sand and fme sand ocks n the primay posity isnot devlo ed.the rseavoir spate is ominatedby secondry posity Col seams.the pupe mutstone and slty musone in h Shansilvizi formaton S ic an eng faomalton an Lower Tisse isthe efctve capock. So thre are vald soure-resevoir cap asemblages. T e fiot ydrocaon geneaton of the Caronfecou-Permian sourcerockoswos inthelae Tiossc: an almied amount ofiyorcaton was gen rated no accumulaion poifi:ane .The seonday iyrocaton g eneration owrred in Shahe je Age,Praleogene wten magma nrvsion ocured an Neongene tonow when puonic meamcophism ocured,esetivelt The strcural rap n he aes are many bockfaule aps and anticlie traps which mainly formed in Kongdi nAge to 'st memteraof Satheje Ag .T7he Oligas esevor-oming condlti s is od n re anYlang.un sJoves an th soaje condtionare controlling factors of the oil and gas reservoir.