准噶尔盆地车排子地区火山岩裂缝形成期次分析

发布时间：2018-06-26 23:38

本文选题：车排子地区 + 火山岩　；参考：《天然气地球科学》2017年01期

【摘要】：准噶尔盆地车排子地区石炭系广泛发育火山岩,多期次构造运动的影响使得火山岩产生大量天然裂缝。通过岩心观察、薄片鉴定和成像测井资料等分析,认为石炭系火山岩主要发育构造裂缝,多期裂缝相互切割及充填现象明显,裂缝走向主要为NE、NW、NNE和NNW向,其中优势方位为NE向和NW向。结合裂缝切割关系及构造演化背景,采用岩石声发射实验和碳氧稳定同位素分析测试手段确定石炭系火山岩裂缝具有4个形成期次,分别对应海西运动期、印支运动期、燕山运动期和喜马拉雅运动期。研究认为,各期次构造运动的性质控制着不同期次裂缝的类型、规模及方位分布,海西—印支期构造活动最为强烈,是研究区构造裂缝形成的主要时期。
[Abstract]:Volcanic rocks are widely developed in the Carboniferous in Chepaizi area of Junggar Basin. The influence of multi-stage tectonic movement causes a large number of natural fractures in volcanic rocks. Based on core observation, thin slice identification and imaging logging data, it is concluded that structural fractures are mainly developed in Carboniferous volcanic rocks, and that the intercutting and filling phenomena of multiple fractures are obvious, and the fracture strike is mainly in the direction of NENWNNE and NNW. The dominant azimuth is NE and NW. Combined with fracture cutting relationship and tectonic evolution background, rock acoustic emission test and carbon-oxygen stable isotope analysis were used to determine that Carboniferous volcanic fractures had four forming periods, corresponding to Hercynian movement period and Indosinian movement period, respectively. Yanshanian movement and Himalayan movement. It is considered that the nature of each subtectonic movement controls the type, scale and orientation distribution of the fractures in different periods, and the Hercynian-Indosinian tectonic activity is the most intense, which is the main period for the formation of tectonic fractures in the study area.
【作者单位】：中国石油大学(华东)地球科学与技术学院;海洋国家实验室海洋矿产资源评价与探测技术功能实验室;中国石化胜利油田分公司油气勘探管理中心;
【基金】：国家科技重大专项“复杂油气藏精细表征及剩余油分布预测”(编号:2011ZX05009-003)资助
【分类号】：P618.13;P588.14

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