裂缝模拟技术在HZ地区的应用

Application of Fracture Simulation Technology in HZ Region

摘要: 叠后地震数据作为石油工业中最常用的数据，在大多数情况下，仅用于基于地震属性定性刻画裂缝发育程度。现有裂缝预测技术存在明显局限性：在常用的叠后裂缝预测方法中，蚂蚁体目前被认为是对裂缝识别精度较高的手段，在剖面和平面上均能较好地指示裂缝发育。但是受制于资料、人工参数的影响，其抗噪性能略差，且仍停留在定性属性描述层面，缺乏定量预测能力。为实现断裂的快速有效识别，研究提出了一种基于张量方向场的裂缝定量预测技术，利用叠后地震数据开展裂缝定量预测，以提升断裂预测精准度。将该方法应用于苏北盆地HZ地区阜宁组页岩油储层，通过与实际钻井成像测井资料中的裂缝密度及方位进行对比，验证了该方法具有较高的可靠性。

Abstract: Post-stack seismic data, as the most commonly used data in the petroleum industry, is mostly used only to qualitatively describe the degree of fracture development based on seismic attributes. Existing fracture prediction technologies have limitations. Among commonly used post-stack methods, ant-body simulation is currently considered to be a method with high accuracy in fracture identification in post-stack fracture prediction, and it can indicate the existence of fractures well in both profile and planar views. However, constrained by data quality and manual parameter settings, it exhibits relatively poor noise resistance and remains confined to qualitative attribute characterization, lacking quantitative prediction capability. To achieve rapid and effective fracture identification, this study proposes a quantitative fracture prediction technology based on tensor direction field, using post-stack seismic data to conduct quantitative fracture prediction and improve the accuracy of fracture prediction. The method was applied to the shale oil reservoirs of the Funing Formation in the HZ area of the Subei Basin. Comparison with fracture density and fracture direction data from actual drilling imaging logging showed that this method has high reliability.