基于X-CT技术不同煤岩类型煤储层非均质性表征
发布时间：2018-08-02 16:37
【摘要】：为了深入探究煤岩类型与煤储层孔裂隙的耦合关系,表征韩城矿区煤储层孔隙纵向非均质性,选取了韩城矿区4种煤岩类型的煤样,采用X射线层析扫描技术,模拟和重构了韩城矿区煤储层内部孔裂隙、煤岩基质和矿物的形态与空间分布格架,建立了三维立体重构模型,实现了对不同煤岩类型孔裂隙分布的三维可视化精细表征。试验结果表明:不同的煤岩类型,孔裂隙的发育程度不同,但CT变化值较为一致,基本呈双峰分布,相较于半亮煤、半暗煤和暗淡煤,光亮煤孔裂隙发育程度最高,孔隙分布非均质性最强,孔裂隙连通性最好,并且从光亮煤到暗淡煤,呈现出孔裂隙的发育程度和连通性逐渐变差,矿物充填程度和小孔含量逐渐升高的趋势。
[Abstract]:In order to explore the coupling relationship between coal rock types and pore fractures in coal reservoirs and characterize the vertical heterogeneity of coal reservoir pores in Hancheng mining area, four coal samples of coal and rock types in Hancheng mining area were selected, and X-ray tomography scanning technique was used. This paper simulates and reconstructs the internal pore fissures, the morphology and spatial distribution of coal and rock matrix and minerals in Hancheng mining area, establishes a three-dimensional reconstruction model, and realizes the three-dimensional visualization of pore and fracture distribution of different types of coal and rock. The experimental results show that different types of coal and rock have different development degree of pore and fissure, but CT change value is consistent, and it is basically bimodal distribution. Compared with semi-bright coal, semi-dark coal and dim coal, bright coal pore fissure has the highest degree of development. The heterogeneity of pore distribution is strongest, the connectivity of pore and fissure is the best, and from bright coal to dim coal, the development degree and connectivity of pore fissure become worse, mineral filling degree and pore content increase gradually.
【作者单位】： 中国地质大学(北京)能源学院;煤层气开发利用国家工程研究中心煤储层实验室;
【基金】：国家科技重大专项资助项目(2016ZX05042-002) 国家自然科学基金资助项目(41272175) 中央高校基本科研业务费专项资金资助项目(2652015331)
【分类号】：P618.13
本文编号：2160035
[Abstract]:In order to explore the coupling relationship between coal rock types and pore fractures in coal reservoirs and characterize the vertical heterogeneity of coal reservoir pores in Hancheng mining area, four coal samples of coal and rock types in Hancheng mining area were selected, and X-ray tomography scanning technique was used. This paper simulates and reconstructs the internal pore fissures, the morphology and spatial distribution of coal and rock matrix and minerals in Hancheng mining area, establishes a three-dimensional reconstruction model, and realizes the three-dimensional visualization of pore and fracture distribution of different types of coal and rock. The experimental results show that different types of coal and rock have different development degree of pore and fissure, but CT change value is consistent, and it is basically bimodal distribution. Compared with semi-bright coal, semi-dark coal and dim coal, bright coal pore fissure has the highest degree of development. The heterogeneity of pore distribution is strongest, the connectivity of pore and fissure is the best, and from bright coal to dim coal, the development degree and connectivity of pore fissure become worse, mineral filling degree and pore content increase gradually.
【作者单位】： 中国地质大学(北京)能源学院;煤层气开发利用国家工程研究中心煤储层实验室;
【基金】：国家科技重大专项资助项目(2016ZX05042-002) 国家自然科学基金资助项目(41272175) 中央高校基本科研业务费专项资金资助项目(2652015331)
【分类号】：P618.13
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1 马勇新;朱定军;李文红;;复合韵律油藏纵向非均质影响数值模拟研究[J];东华理工大学学报(自然科学版);2013年S2期
，本文编号：2160035
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