力学地层定量划分及其对深成岩溶作用的控制效应——以塔里木盆地阿满过渡带奥陶系为例

走滑断裂相关的深成岩溶储层是塔里木盆地深层油气勘探的重要目标。前人研究主要集中于走滑断裂的几何学特征对储层发育的控制上，对深成岩溶流体流动行为缺乏系统性梳理，断裂垂向结构约束下的深成岩溶作用机理的研究仍显薄弱。本项目围绕“走滑断裂对深成岩溶作用的控制效应”这一科学问题，聚焦塔里木盆地阿满过渡带，首先基于裂缝强度参数的量化计算划分力学地层单元，区分“贯穿式”断裂与“层控”裂缝；然后，基于断裂及围岩的成岩响应特征，建立不同类型岩溶流体流动系统的物理化学识别标志。在此基础上，基于力学地层格架内流体流动系统的响应记录和洞穴的垂向分布特征，从静态上揭示不同力学地层内流体活动的差异性；并将流体活动年代学分析和断裂演化历史相结合，从动态上阐明断裂垂向结构与深成岩溶流体活动的耦合关系，建立走滑断裂—深部流体相互作用的演化模式，为深层碳酸盐岩油气勘探提供依据。

Hypogenic karst reservoirs related to strike-slip fault are important targets for deep petroleum exploration in the Tarim Basin. Previous studies mainly focused on the control of the geometric characteristics of strike-slip faults on the reservoir development. The flow behavior of hypogenic karst fluids has not been systematically sorted out, and the investigation of the hypogenic karstification mechanism constrained by the vertical architecture of faults is still poor. In this project, the control effect of strike-slip faults on hypogenic karstification will be studied in the transitional zone between Awati and Manjiaer depressions, Tarim Basin. First, the mechanical stratigraphic units will be divided based on the quantitative calculation of fracture strength and the throughgoing and stratabound fractures will be distinguished. Then, the physicochemical identification signals of different types of karst fluid flow systems will be established in terms of the diagenetic response characteristics in the faults and host rocks. On the basis of the above, through integrating the response record of the fluid flow system with the vertical distribution characteristics of the cave in the mechanical stratigraphic framework, the differences of fluid activities in different mechanical stratigraphic units will be statically revealed. Meanwhile, the coupling relationship between the vertical architecture of the fault and the activity of hypogenic karst fluid will be dynamically clarified, combining the chronological analysis of fluid activities and the evolution history of fault system. Finally, the evolution model of the strike-slip fault-deep fluid interaction will be established to provide a basis for deep carbonate petroleum exploration.