断裂和裂缝的分形特征

付晓飞; 苏玉平; 吕延防; 张云峰; 付广

断裂和裂缝的分形特征

大庆石油学院地球科学学院黑龙江大庆 163318

基金项目:

国家“973”攻关项目“高效大气田形成机理及分布研究” 2001CB20914

详细信息

作者简介:
付晓飞(1973-), 男, 副教授, 主要从事油气藏形成及资源评价方面的工作.E-mail: fuxiaofei2008@sohu.com

中图分类号: P618.13
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出版历程
- 收稿日期: 2006-02-10
- 刊出日期: 2007-03-25

Fractal Characteristic and Geological Meaning of Fault and Fracture

Faculty of Earth Science, Daqing Petroleum Institute, Daqing 163318, China

摘要

摘要: 在详细剖析断裂和裂缝组成和结构相似性的基础上, 计算了贝尔断陷T₅和T₂两层构造图上断裂信息维和10口井布达特群岩心裂缝信息维, 分析了影响断裂和裂缝信息维的因素, 达到了从断裂信息维去预测裂缝分布的目的.影响断裂和裂缝信息维的因素包括密度、延伸长度、断层性质以及岩性, 但从根本上讲断层性质及岩性对信息维影响体现在断裂的密度上, 因此信息维应该是断裂发育程度的度量, 利用断裂信息维与裂缝信息维关系、裂缝信息维与裂缝密度关系预测裂缝的分布, 有利的裂缝发育带有3个区域, 与现今见油气井分布吻合.
- 断裂 /
- 裂缝 /
- 信息维 /
- 影响因素 /
- 有利裂缝发育区
Abstract: Based on the analysis of the forms and the comparability in configuration of fault and fracture, the information dimension of faults on tectonic map T₅, T₂ and that of fracture in ten cores from research formation J₃b were calculated, then the factors affecting their information dimension were analyzed, finally, the distribution of fracture in the research region is predicted. These affecting factors include density, extend, properties of faults and lithology. However, the effects from the properties of faults and lithology are concentrated on density of fault and fracture, so the information dimension is a measurement for to what extent faults have developed. The distribution area of fracture was forecasted two relations: one is the relationship between information dimension of faults, the other is the relationship between the information dimension and density of fracture, three favorable fracture-developed areas were sketched, which turned out to be in accordance with the distribution of commercial wells.
- fault /
- fracture /
- information dimension /
- affecting factors /
- favorable fracture-developed area

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图 1 贝尔凹陷地质概况

Fig. 1. Geological outline of Bei'er depression

下载: 全尺寸图片幻灯片

图 2 贝尔断陷T₅反射层断裂和布达特群裂缝发育方位对比

下载: 全尺寸图片幻灯片

图 3 断裂和裂缝面密度与其信息维关系

Fig. 3. Relation between surface density of fracture and fault and their information dimension

下载: 全尺寸图片幻灯片

图 4 断裂长度与信息维关系(a)和不同岩性裂缝信息维分布(b)

Fig. 4. Relation between fault length and information dimension (a) and distribution of information dimension of fracture with different lithology (b)

下载: 全尺寸图片幻灯片

图 5 贝尔断陷布达特群(T₅)断裂信息维(a)及裂缝密度平面分布(b)

a. T₅反射层断裂信息维平面分布; b. 布达特群裂缝密度平面分布

Fig. 5. Distribution of faults information dimension (a) and fault density on T₅ in Bei'er depression (b)

下载: 全尺寸图片幻灯片

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