逆冲断层发育区火山岩裂缝分布模式

发布时间：2018-04-18 10:28

  本文选题：裂缝 + 分布模式　； 参考：《天然气地球科学》2017年07期

【摘要】：准噶尔盆地车排子地区石炭系内发育有多条逆冲断层和多样的火山岩,且火山岩储层中构造裂缝发育。为了研究逆冲断层发育区火山岩裂缝分布模式,以车排子地区石炭系火山岩为例,分析了裂缝在纵向上和平面上的分布特征,并引入裂缝分布范围的"质心"概念,定量研究了裂缝分布范围在三维空间中的变化特征,提出了逆冲断层发育区火山岩裂缝分布模式。研究认为:裂缝空间分布范围变化特征有4种类型:质心正向偏移+密度值变大型(Ⅰ型)、质心负向偏移+密度值变大型(Ⅱ型)、质心正向偏移+密度值减小型(Ⅲ型)、质心负向偏移+密度值减小型(Ⅳ型)。逆冲断层发育区火山岩裂缝具有条带状楔形质心偏移模式,该模式特点为:平面上,裂缝分布形态呈现条带状;纵向上,裂缝分布形态呈现楔形,同时受到火山岩岩性的影响,局部裂缝的分布范围变大;裂缝分布范围的"质心"会在断层和火山岩岩性的控制作用下发生偏移。裂缝分布范围的"质心"概念的引入,可为裂缝分布规律的研究提供一种新的思路和方法。
[Abstract]:There are many thrust faults and various volcanic rocks in Carboniferous in Chepaizi area of Junggar Basin and tectonic fractures are developed in volcanic reservoir.In order to study the fracture distribution pattern of volcanic rocks in thrust fault development area, taking Carboniferous volcanic rocks in Chepaizi area as an example, the distribution characteristics of fractures in longitudinal and plane are analyzed, and the concept of "center of mass" of fracture distribution range is introduced.The variation characteristics of fracture distribution range in three dimensional space are studied quantitatively, and the distribution pattern of volcanic rock fractures in thrust fault area is proposed.It is found that there are four types of variation in the spatial distribution of fractures: the density value of the forward migration of the center of mass becomes large (type 鈪，

本文编号：1767971