用“伞式解构”方法剖析致密储层微观各向异性

杜书恒; 庞姗; 柴光胜; 汪贺; 师永民

doi:10.3799/dqkx.2018.567

用“伞式解构”方法剖析致密储层微观各向异性

doi: 10.3799/dqkx.2018.567

杜书恒^1, ,,
庞姗^2,3,
柴光胜^2,3,
汪贺^2,3,
师永民^2,3

1.
中国科学院力学研究所非线性力学国家重点实验室, 北京 100190
2.
北京大学地球与空间科学学院, 北京 100871
3.
北京大学石油与天然气研究中心, 北京 100871

基金项目:

国家自然科学基金项目 41902132

中国科学院油气资源研究重点实验室开放基金项目 KLOR2018-6

详细信息

作者简介:
杜书恒(1994-), 男, 博士, 助理研究员, 主要从事非常规油气综合研究

中图分类号: P618
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- PDF下载量: 34
- 被引次数: 0
出版历程
- 收稿日期: 2018-10-26
- 刊出日期: 2020-01-15

Quantitative Analysis on the Microscopic Anisotropy Characteristics of Pore and Mineral in Tight Reservoir by "Umbrella Deconstruction" Method

Du Shuheng^{1
,
,},
Pang Shan^2,3,
Chai Guangsheng^2,3,
Wang He^2,3,
Shi Yongmin^2,3

1.
State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
2.
School of Earth and Space Science, Peking University, Beijing 100871, China
3.
Institute of Oil and Gas, Peking University, Beijing 100871, China

摘要

摘要: 致密油气储层作为非常规油气储层的重要类型，具有孔隙尺度小，微观非均质性强等显著特征.目前在大幅提高资源动用率方面仍面临重大理论挑战，探索潜力广阔.本研究利用“伞式解构”方法定量解析了中国鄂尔多斯盆地陆相致密砂岩储层孔隙和矿物的微观各向异性特征.实例研究显示，八向伞式切片微观孔喉发育存在显著的微观各向异性，各向填隙物发育特征差异明显，随着取样角度的变化，呈现连续非稳态分布.八向伞式切片分形维数是孔隙率、渗透率和孔喉发育概率的良好表征.研究可为揭示致密储层储渗机理及“甜点”分布规律，指导致密油气有效开发提供重要的理论支撑与实践依据.
- 伞式解构 /
- 微观各向异性 /
- 致密储层 /
- 表征 /
- 孔隙 /
- 石油地质
Abstract: As an important type of unconventional reservoirs, tight oil and gas reservoirs are characterized by small pore scale and obvious micro-heterogeneity. The exploration potential is vast despite the major theoretical challenges in greatly improving the recovery rate of resources. In this study, the micro anisotropic characteristics of pores and minerals in continental tight sandstone reservoirs in Ordos basin, China, are quantitatively analyzed by means of "umbrella deconstruction". The case study shows that there is a significant micro anisotropy in the micro pore-throat development in eight directions, and the development characteristics of the anisotropic filler are obviously different. With the change of sampling angle, the micro pores show continuously unsteady distribution. The fractal dimension could characterize the porosity, permeability and pore-throat development probability. The study can provide important theoretical support and practical basis for revealing the mechanism of tight reservoir permeability, "sweet spot" distribution and guiding the effective development of tight oil and gas.
- umbrella deconstruction /
- micro-anisotropy /
- tight reservoir /
- characterization /
- pore /
- petroleum geology

HTML全文

图 1 研究区地理位置

Fig. 1. Location of the study area

下载: 全尺寸图片幻灯片

图 2 “伞式解构”技术原理示意

据Du et al.(2018a, 2018b)

Fig. 2. Schematic diagram of "umbrella deconstruction" technology

下载: 全尺寸图片幻灯片

图 3 八向孔隙半径分布

a.0°方向；b.22.5°方向；c.45°方向；d.67.5°方向；e.90°方向；f.112.5°方向；g.135°方向；h.157.5°方向

Fig. 3. Distribution of pore radius in eight directions

下载: 全尺寸图片幻灯片

图 4 八向喉道半径分布

a.0°方向；b.22.5°方向；c.45°方向；d.67.5°方向；e.90°方向；f.112.5°方向；g.135°方向；h.157.5°方向

Fig. 4. Distribution of throat radius in eight directions

下载: 全尺寸图片幻灯片

图 5 八向切片孔喉属性参数分布

Fig. 5. Distribution of pore and throat parameters in eight direction

下载: 全尺寸图片幻灯片

图 6 八向切片孔喉属性参数变化曲线

Fig. 6. Change curve of pore and throat parameters in eight directions

下载: 全尺寸图片幻灯片

图 7 八向切片填隙物条带属性参数变化曲线

Fig. 7. Change curve of parameters of interfilling strip properties in eight directions

下载: 全尺寸图片幻灯片

图 8 八向孔喉分形维数与孔喉属性参数相关性分析

Fig. 8. Correlation analysis between pore-throat fractal dimension in eight directions and pore throat attribute parameters

下载: 全尺寸图片幻灯片

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