构造裂缝的分形研究  

Fractal Study on Structural Fracture

作　　者：张庆莲[1,2] 侯贵廷[1,2] 潘文庆[3] 韩剑发[3] 琚岩[3] 李乐[1,2] 鞠玮[1,2] 舒武林[1,2] 

机构地区：[1]北京大学造山带与地壳演化教育部重点实验室,北京100871 [2]北京大学石油与天然气研究中心,北京100871 [3]塔里木油田分公司勘探开发研究院,新疆库尔勒841000

出　　处：《应用基础与工程科学学报》2011年第6期853-861,共9页Journal of Basic Science and Engineering

基　　金：国家自然科学基金(40772121);塔里木油田项目<柯坪-西克尔地区野外碳酸盐岩构造裂缝地质建模>

摘　　要：从数学规律的角度,应用分形理论,对构造裂缝的分布发育规律进行研究.分数维D值越大,说明构造裂缝分布越均匀,各向异性较强,构造裂缝的分布发育较好.与走滑断裂属同一构造应力场的构造裂缝,随着距离走滑断裂距离的增大,分数维D值呈指数减小;随构造裂缝面密度的增大,分数维D值呈线性增大.分数维D值大小更能体现构造裂缝分布的均匀程度和各向异性,同时考虑构造裂缝面密度和分数维,引用发育程度f来表征岩石破裂程度.对裂缝油气藏来说f,越大表明岩石破裂程度越高,储层裂缝越发育.靠近断裂岩石破裂程度高,有利于油气的运移.Based on fractal theory regardless of geological conditions, this paper discussed the distribution regular pattern and development of structural fractures. High fractal dimension （D） shows that the structural fractures distributed evenly and have a good anisotropy. The fractal dimension decreases at an exponential rate with the increasing of the distance away from the strike-slip fault. The fractal dimension increases at a linear rate with the increasing of fracture density. The fractal dimension has a better description of uniformity and anisotropy of structural fractures.f depends on fracture density and fractal dimension, which describes the fracture abundance. For fractured reservoirs, a higher f indicates a better development of reservoir fractures. The area near the strike-slip fault is suitable for the migration of oil and gas.

关 键 词：分形 分数维D 构造裂缝 走滑断裂 面密度 

分 类 号：TE121[石油与天然气工程—油气勘探]