引
11[]1[]
码等典居且必
.,,晶石偏式哇哇粮(自鼓料,营版)
2013
年
4
月第
35
卷第
2
期
Journal
of
Southwest Petroleum University (Science & Technology Edition)
Vol.
35
No. 2
Apr.
2013
文章编号:
1674
5086(2013)02 0071
06
中图分类号:
TE19
DOI:
10.
3863/j. issn. 1674 5086. 2013.
02.
010
文献标识码:
A
闰国亮
1
,孙建孟
1
,刘学锋
2
,张丽
1
1
中国石油大学(华东)地球科学与技术学院,山东青岛
266580;
2.
中国石油大学(华东)理学院,山东青岛
266580
*
摘
要:由于利用
X
射线
CT
扫描获得反映真实岩石微观结构的三维数字岩芯过于昂贵和费时,因此,正确评价利用
岩芯二维薄片图像重建三维数字岩芯的准确性具有重要理论和应用价值。采用过程模拟法,依据岩芯的二维薄片图
像,通过模拟真实岩石的形成过程一一沉积过程,压实过程和成岩作用重建了三维数字岩芯,并且应用局部孔隙度分
布函数和平均渗流概率函数进行了重建三维数字岩芯的准确性评价。结果表明:过程模拟法重建的三维数字岩芯与
真实岩芯具有相同的均匀性和连通性,且重建三维数字岩芯与真实数字岩芯都是各向同性的。重建的三维数字岩芯
不仅可以用来表征具实岩芯的孔隙结构,而且也可以作为其他岩石物理属性模拟的基础。
关键词:三维数字岩芯;过程模拟法;局部孔隙度分布函数;平均渗流概率函数;二维薄片
Accuracy Evaluation on
3D
Digital Cores Reconstruction by
Process-based Method
Yan
Guoliang1,
Sun
Jianmeng1,
Liu
Xuefeng2,
Zhang
Li1
1.
School
of
Geosciences,
China
University
of
Petroleum,
Qingdao,
Shandong
266580,
China
2.
College
of
Science,
China
University
of
Petroleum,
Qingdao,
Shandong
266580,
China
Abstract:
It
is
too expensive and time consuming by use X-ray computerized tomography( CT) to obtain the real 3D digi-
ta!
cores for representing
the
仕
ue
microstructures
of
rocks. It
is
important in both theory and applications to reconstruct 3D
digital cores based on 2D thin section
of
rocks and evaluate the accuracy
of
reconstructed digital cores.
3D
digital core was
reconstructed utilizing petrographical information obtained
台
om
two dimensional thin sections
to
model the results
of
the main
sedimentary rocks forming processes-sedimentation, compaction, and diagenesis. The accuracy
of
this method is evaluated
by calculating local porosity distribution function and average percolation probability function in real
3D
digital cores and the
reconstructed digital cores. The results show that the homogeneity and connectivity
of
recons
甘
ucted
three-dimension digital
core by process
” based method are similar
to
those
of
true 3D digital core and both
of
th
巳
reconstructed
3D digital core and true
3D digital core are
iso
位
opic.
Reconstruction
of3D
digital cores can be used
to
characterize the pore structure
of
the true core,
and can also be used as the basis for simulation
of
other physical properties.
Key
words:
3D digital core; process-based method; local porosity distribution function; average percolation probability func-
ti on; 2D thin section
网络出版地址:
闰国亮,孙建孟,如
l
学锋,等过程模拟法重建三维数字岩芯的准确性评价[
J
).西南石油大学学报:自然科学版,
2013,35(2):71
76.
Yan
Guoliang,
Sun
Jianmeng,
Liu
Xuefe
吨,
et
al.
Accuracy
Evaluation
on
3D
Digital
Cores
Reconstruction
by
Proce<s-based
Method[J).
Journal
of
Southwest
Petroleum
University:
Science
&
Technology
Edition,
2013,
35
(2):
71
76.
~
一
一
E
司
兰维数字岩芯作为岩石微观结构的一种数学
抽象,提供了研究岩石微观结构和宏观性质之间
关系的桥梁。目前,建立三维数字岩芯的方法主
要有两大类:一类是物理方法,主要包括切片组合
扫描法和
X-CT
扫描法;另一类是利用岩石二维薄
片图像统计信息的数学方法。物理方法构建的三
维数字岩芯具有直观、准确的优点,但一方面实验
仪器比较昂贵,另一方面构建三维数字岩芯过程
中需要花费较长的时间进行二维切片制备和扫描,
限制了该类方法在生产实践中的大范围应用。基
*收稿日期:
2012
11-27
网络出版时间:
2013
03
20
基金项目:国家重大科技专项(
2011ZX05014
004
002HZ
)。
引
11[]1[]
码等典居且必
.,,晶石偏式哇哇粮(自鼓料,营版)
2013
年
4
月第
35
卷第
2
期
Journal
of
Southwest Petroleum University (Science & Technology Edition)
Vol.
35
No. 2
Apr.
2013
文章编号:
1674
5086(2013)02 0071
06
中图分类号:
TE19
DOI:
10.
3863/j. issn. 1674 5086. 2013.
02.
010
文献标识码:
A
闰国亮
1
,孙建孟
1
,刘学锋
2
,张丽
1
1
中国石油大学(华东)地球科学与技术学院,山东青岛
266580;
2.
中国石油大学(华东)理学院,山东青岛
266580
*
摘
要:由于利用
X
射线
CT
扫描获得反映真实岩石微观结构的三维数字岩芯过于昂贵和费时,因此,正确评价利用
岩芯二维薄片图像重建三维数字岩芯的准确性具有重要理论和应用价值。采用过程模拟法,依据岩芯的二维薄片图
像,通过模拟真实岩石的形成过程一一沉积过程,压实过程和成岩作用重建了三维数字岩芯,并且应用局部孔隙度分
布函数和平均渗流概率函数进行了重建三维数字岩芯的准确性评价。结果表明:过程模拟法重建的三维数字岩芯与
真实岩芯具有相同的均匀性和连通性,且重建三维数字岩芯与真实数字岩芯都是各向同性的。重建的三维数字岩芯
不仅可以用来表征具实岩芯的孔隙结构,而且也可以作为其他岩石物理属性模拟的基础。
关键词:三维数字岩芯;过程模拟法;局部孔隙度分布函数;平均渗流概率函数;二维薄片
Accuracy Evaluation on
3D
Digital Cores Reconstruction by
Process-based Method
Yan
Guoliang1,
Sun
Jianmeng1,
Liu
Xuefeng2,
Zhang
Li1
1.
School
of
Geosciences,
China
University
of
Petroleum,
Qingdao,
Shandong
266580,
China
2.
College
of
Science,
China
University
of
Petroleum,
Qingdao,
Shandong
266580,
China
Abstract:
It
is
too expensive and time consuming by use X-ray computerized tomography( CT) to obtain the real 3D digi-
ta!
cores for representing
the
仕
ue
microstructures
of
rocks. It
is
important in both theory and applications to reconstruct 3D
digital cores based on 2D thin section
of
rocks and evaluate the accuracy
of
reconstructed digital cores.
3D
digital core was
reconstructed utilizing petrographical information obtained
台
om
two dimensional thin sections
to
model the results
of
the main
sedimentary rocks forming processes-sedimentation, compaction, and diagenesis. The accuracy
of
this method is evaluated
by calculating local porosity distribution function and average percolation probability function in real
3D
digital cores and the
reconstructed digital cores. The results show that the homogeneity and connectivity
of
recons
甘
ucted
three-dimension digital
core by process
” based method are similar
to
those
of
true 3D digital core and both
of
th
巳
reconstructed
3D digital core and true
3D digital core are
iso
位
opic.
Reconstruction
of3D
digital cores can be used
to
characterize the pore structure
of
the true core,
and can also be used as the basis for simulation
of
other physical properties.
Key
words:
3D digital core; process-based method; local porosity distribution function; average percolation probability func-
ti on; 2D thin section
网络出版地址:
闰国亮,孙建孟,如
l
学锋,等过程模拟法重建三维数字岩芯的准确性评价[
J
).西南石油大学学报:自然科学版,
2013,35(2):71
76.
Yan
Guoliang,
Sun
Jianmeng,
Liu
Xuefe
吨,
et
al.
Accuracy
Evaluation
on
3D
Digital
Cores
Reconstruction
by
Proce<s-based
Method[J).
Journal
of
Southwest
Petroleum
University:
Science
&
Technology
Edition,
2013,
35
(2):
71
76.
~
一
一
E
司
兰维数字岩芯作为岩石微观结构的一种数学
抽象,提供了研究岩石微观结构和宏观性质之间
关系的桥梁。目前,建立三维数字岩芯的方法主
要有两大类:一类是物理方法,主要包括切片组合
扫描法和
X-CT
扫描法;另一类是利用岩石二维薄
片图像统计信息的数学方法。物理方法构建的三
维数字岩芯具有直观、准确的优点,但一方面实验
仪器比较昂贵,另一方面构建三维数字岩芯过程
中需要花费较长的时间进行二维切片制备和扫描,
限制了该类方法在生产实践中的大范围应用。基
*收稿日期:
2012
11-27
网络出版时间:
2013
03
20
基金项目:国家重大科技专项(
2011ZX05014
004
002HZ
)。