[1]郭 晨,刘婉萍.基于有限元法的裂缝页岩计算机建模仿真研究[J].计算机技术与发展,2020,30(06):119-123.[doi:10. 3969 / j. issn. 1673-629X. 2020. 06. 023]
　GUO Chen,LIU Wan-ping.Research on Computer Modeling and Simulation of Cracked Shale Based on Finite Element Method[J].COMPUTER TECHNOLOGY AND DEVELOPMENT,2020,30(06):119-123.[doi:10. 3969 / j. issn. 1673-629X. 2020. 06. 023]
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基于有限元法的裂缝页岩计算机建模仿真研究()
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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:
30
期数:
2020年06期
页码:
119-123
栏目:
应用开发研究
出版日期:
2020-06-10

文章信息/Info

Title:
Research on Computer Modeling and Simulation of Cracked Shale Based on Finite Element Method
文章编号:
1673-629X(2020)06-0119-05
作者:
郭 晨; 刘婉萍
长安大学 信息工程学院,陕西 西安 710064
Author(s):
GUO Chen; LIU Wan-ping
School of Information Engineering,Chang’an University,Xi’an 710064,China
关键词:
计算机建模仿真; 网格划分; 裂缝页岩; 有限元算法; 等效介电常数
Keywords:
computer modeling and simulation; meshing; cracked shale; finite element method; effective dielectric constant
分类号:
TP39
DOI:
10. 3969 / j. issn. 1673-629X. 2020. 06. 023
摘要:
含裂缝页岩的电特性一直以来是页岩探测与开采研究中的难点,可在实际应用中却有着非常重要的价值。 传统对页岩电特性的研究方法主要集中于理论公式的计算和实验仪器的测量,其缺点是理论公式和实验仪器无法正确地表征页岩的内部结构,而页岩内部结构对电特性的影响巨大,传统方法无法研究页岩内部结构对电特性的影响,以至于无法准确地描述页岩在地层中的分布情况,进而影响页岩的勘探与开采。 因此,文中采用计算机技术对页岩内部结构进行建模,剖分与仿真。 对常见的页岩结构进行了理想化建模,主要包括层状结构、层状加薄膜结构以及椭球形内含物结构,并基于有限元算法对其进行了仿真,发现不同结构的页岩在其介电特性会呈现不同的规律。 相比于层状结构,在宽频带内,层状加薄膜结构低频处会出现巨大的增强现象;含有椭球形内含物结构,其介电特性在三方向上会出现不同的规律。 研究结果可为页岩裂缝特征及油气含量的评价提供一定的理论依据。
Abstract:
The electrical properties of crack-bearing shale have always been a difficult point in shale exploration and mining research,but they are of important value in practical applications. Traditional research methods on shale electrical properties mainly focus on the calculation of theoretical formulas and the measurement of experimental instruments. The disadvantage is that theoretical formulas and experimental instruments cannot correctly characterize the internal structure of shale which has a huge electrical characteristics. The traditional methods cannot study the influence of the internal structure of shale on the electrical properties,so it can not accurately describe the distribution of shale in the formation, thus affecting the exploration and exploitation of shale. Therefore, we adopt computer technology to model,split and simulate the internal structure of shale. The ideal shale structure with cracks is ideally modeled,including layered structure,layered film structure and ellipsoidal inclusion structure,which is simulated based on finite element method. It is found that the dielectric properties of shale with different structures will show different rules. Compared with the layered structure,in the wide frequency band,the layered film structure will have a large enhancement at low frequencies; the ellipsoidal inclusion structure will have different dielectric properties in three directions. The research results can provide a theoretical basis for the evaluation of shale fracture characteristics and oil and gas content.

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更新日期/Last Update: 2020-06-10