Structural fracture is an important condition for obtaining high gas yield from the deep tight glutenite reservoir of the Cretaceous Yageliemu Formation in KT-1 gas reservoir of Kuqa Depression.To study the distribution and effectiveness of structural fracture is conducive to favorable reservoir prediction of Yageliemu Formation.Based on core and imaging logging data,the characteristics of structural fractures in Yageliemu Formation of KT-1 gas reservoir are described,and the distribution of structural fractures is semi-quantitatively predicted by finite element method.The effectiveness of structural fractures is evaluated from two aspects:time and space effectiveness.Finally,the numerical simulation of structural fracture is carried out under the condition of constant horizontal stress and increasing gravity load of overlying strata.The results show that the glutenite reservoir of Yageliemu Formation in KT-1 gas reservoir develops tensile fractures and shear fractures,mainly at medium-high angles,and the dominant trend is NW-SE,which has a good correspondence with the maximum paleotectonic stress orientation in the NNW direction.There are at least two stages of fracture in Yageliemu Formation of KT-1 gas reservoir.The first stage of fracture is invalid,which was formed before the depositional period of the Neogene Kangcun Formation.The second stage of fracture is effective formed in the depositional period of the Pliocene Kuqa Formation-Quaternary(5 Ma until now),which has a good matching relationship with natural gas charging,and is an important condition for the formation of large-scale natural gas reservoir.The fracture spatial effectiveness is mainly controlled by the fracture density and fracture opening.The fracture density in the high position of anticline of KT-1 gas reservoir is lower than that in the wing,but the fracture opening is larger and the fracture permeability is significantly higher than that in the wing,which is an important reason why Well KT204 located in the wing has the highest fracture density but the lowest gas production.The numerical simulation results show that in a certain depth range,with the increase of reservoir buried depth,the density of structural fractures decreases,but the aperture and permeability increase significantly,and the effectiveness becomes significantly better,which is more conducive to the efficient flow of natural gas in the reservoir.