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断层端部破碎带是地下水、油气和含矿物热液等多种矿产资源勘探的有利目标区.按照次生断裂与主走滑断层端点的位置关系和形变性质,对方正断陷大罗密构造带走滑断层西南端的破碎带类型进行划分,通过几何特征分析,明确了破碎带形成时的区域应力状态,并结合油气分布规律,讨论了该区走滑断裂及破碎带的控藏作用,指出断层面优势运移路径与圈闭的空间配置是控制油气运聚的主要因素.研究结果表明:在区域右旋走滑作用控制下,走滑断层端部存在2种类型破碎带,一是端部西侧的应变伸展区发育正断层型破碎带,二是端部东侧的挤压区发育逆断层型破碎带,根据断裂展布特征,判断破碎带形成时最大水平压应力方向为N290°~300°.走滑断裂及其端部破碎带对油气成藏的控制作用总结为3个方面:走滑断裂及端部伴生断裂长期活动为油气运移提供输导通道,断层的断面脊部位是油气沿断裂运移的优势路径,与运移路径配置的断层下盘断背斜为油气富集场所.
The fault-end fault zone is a favorable target area for exploration of groundwater, oil and gas and mineral-bearing hydrothermal fluids, etc. According to the relationship between secondary faults and the location of the main strike-slip fault and the deformation characteristics, According to the analysis of geometric characteristics, the regional stress state during the formation of the crushing zone is clarified. Combined with the distribution law of oil and gas, the controlling action of the strike-slip faults and the crushing zone in this area is discussed. The results show that there are two types of crustal belts at the ends of strike-slip faults under the control of right-lateral strike-slip in the area, According to the characteristics of fracture distribution, the direction of the maximum horizontal compressive stress in the formation of broken zone is N290 ° ~ 300 °. The controlling effects of strike-slip faults and their end-broken zones on hydrocarbon accumulation are summarized as follows: The long-term activities of strike-slip faults and associated faults at the end provide guiding channels for hydrocarbon migration, The ridge of the section is the dominant path for the migration of oil and gas along the fault, and the fault anticline of the lower fault configured by the migration path is the place where oil and gas are enriched.