Factors Controlling Natural Gas Accumulation in the Southern Margin of Junggar Basin and Potential Exploration Targets

In this paper, factors controlling natural gas accumulation in the southern margin of Junggar Basin were mainly discussed by a comparison with generation and Kuqa Depression Tarim Basin. The are located on north south sides Tianshan Mountains respectively, they share similar sedimentary stratigraphy tectonic evolution history. recent several decades, many large fields have been found Basin, but no great breakthrough Our results suggest that is thermogenic wet gas, can be divided into three types as coal-derived mixed oil-associated which former two dominated. Jurassic coal measures main source rocks time from set matched well formation anticline structures, resulting favorable conditions for accumulation. western part Permian lacustrine Upper Triassic lacustrine-swamp could important sources also traps. Compared better geologic oil deep Permian-Jurassic-Cretaceous petroleum system most exploration central first targets discovery reservoirs. shallow Cretaceous-Neogene second target exploration.