【摘要】 Aran背斜是伊朗卡山区块主要勘探目标,前期勘探已揭示其目的层库姆组C4亚段为一套典型的裂缝性储层.在Aran背斜三维地震构造精细解释基础之上,利用并改进构造线曲率法,五点二次拟合法,对贯穿该构造的276条剖面开展了曲率计算,并编制了C4段顶最大曲率平面分布图.结合断裂系统分布,总结出该构造裂缝发育主要分布在背斜的长轴、高点及北西倾伏端,依据曲率值分布,将该背斜划分为3个裂缝带,并依次对其进行了评价,揭示了裂缝发育分布规律.上述认识对该构造的进一步勘探具有参考意义.更多还原

【Abstract】 Aran anticline is the main exploration target in the Kashan Block in Iran.The C4 sub-member of the Qom formation has already been proved a set of typical fractured reservoir by previous exploration activities.In this paper,based on fine structure interpretation on 3D seismic data covering Aran anticline,using an improved tectonic line curvature with five-point twice fitting,we conducted curvature calculation of 276 profiles covering this structure,and then mapped the maximum curvature distribution diagram of the top of the C4 sub-member.In the combination of the fault system distribution,our research indicates that the structural fractures mainly developed along the long axis,in the high part and NW plunging of this fold.In term of the curvature value,we mapped 3 fracture zones on this anticline and conducted evaluation on them,revealing the development and distribution law of fractures within this fold.These understandings are beneficial for further exploration for this structure.更多还原