断层破碎带的建模方法和意义

Method and significance of modeling for fractured fault zone

李少华 王利 王军 李君

长江大学地球科学学院，湖北 武汉 430100 非常规油气湖北省协同创新中心，湖北 武汉 430100 中国石油吉林油田分公司，吉林 松原 138000 中国石化胜利油田分公司地质科学研究院，山东 东营 257015 长江大学地球环境与水资源学院，湖北 武汉 430100

School of Geoscience, Yangtze University, Wuhan 430100, China Hubei Cooperative Innovation Center of Unconventional Oil and Gas, Wuhan 430100, China Jilin Oilfield Company, PetroChina, Songyuan 138000, China Geological Research Institute, Shengli Oilfield Company, SINOPEC, Dongying 257015, China School of Earth Environment and Water Resources, Yangtze University, Wuhan 430100, China

在露头中观测到的断层通常显示为一个破碎带，而在地质建模中，断层被简化成一个面，因此无法对断层破碎带进行有效表征。为此，文中提出了一种新的断层破碎带建模方法：用2个断层面表示断层破碎带的2个边界，断层面之间的距离由断层破碎带的范围决定，2个断层面所圈定的部分作为断层破碎带。在断层破碎带内部，将其中的断面充填物与裂缝带分别表征，由此可以表示充填物与裂缝带的不同组合模式。提出的建模方法既较好地表征了断层破碎带内部结构，又更好地体现了断层封堵性，能够建立更加符合地质实际的断层模型。

The fault observed in the outcrop usually appears as a fractured zone. However, fault is simplified as a surface when geology modeling is made, so fractured fault zone cannot be characterized effectively. Based on this situation, we propose a new method. Two fault surfaces are used to represent the two boundaries of fractured fault zone and the distance of the two surfaces is determined by the extent of a fractured fault zone, so the restricted area by the two surfaces is regarded as a fractured fault zone. In the inner of fractured fault zone, the fault fill and fracture zone are characterized independently, which can characterize the various composite modes of fault fill and fracture zone. The proposed modeling method not only characterizes the structure of fractured fault zone, but also reflects the sealing characteristics of fractured fault zone, which can construct a fault model that will be more consistent with the actual geology phenomena.

10.6056/dkyqt201404001