Characteristics of Nano-pores of Clay Minerals in Tight Reservoirs and Their Effects on Reservoir Properties: A Case Study of Yanchang-6 Oil Formation in Ordos Basin

doi:10.13209/j.0479-8023.2020.037

Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2020, Vol. 56 ›› Issue (4): 659-666.DOI: 10.13209/j.0479-8023.2020.037

Previous Articles Next Articles

Characteristics of Nano-pores of Clay Minerals in Tight Reservoirs and Their Effects on Reservoir Properties: A Case Study of Yanchang-6 Oil Formation in Ordos Basin

WANG He^1,2, SHI Yongmin^1,2,†, ZHANG Zhiqiang^1,2, SUN Tong^1,2, SHI Shiyuan^1,2, GUAN Ping^1,2, XU Dawei³

1. School of Earth and Space Sciences, Peking University, Beijing 100871 2. Institute of Oil and Gas, Peking University, Beijing 100871 3. School of Petroleum Engineering, University of Science and Technology of Missouri, Rolla MO 65401

Received:2019-05-16 Revised:2019-10-13 Online:2020-07-20 Published:2020-07-20
Contact: SHI Yongmin, E-mail: sym(at)pku.edu.cn

致密砂岩储层黏土矿物晶间孔隙特征及其对物性影响的研究——以鄂尔多斯盆地延长组长6油层组为例

汪贺^1,2, 师永民^1,2,†, 张志强^1,2, 孙彤^1,2, 史世元^1,2, 关平^1,2, 徐大卫³

1. 北京大学地球与空间科学学院, 北京 100871 2. 北京大学石油与天然气研究中心, 北京 100871 3. School of Petroleum Engineering, University of Science and Technology of Missouri, Rolla MO 65401

通讯作者: 师永民, E-mail: sym(at)pku.edu.cn
基金资助:
国家自然科学基金(41930103)资助

Abstract

Abstract:

In view of the lack of quantitative characterization of intercrystalline pores of clay minerals in tight sandstone reservoirs, the development characteristics of clay minerals and intercrystalline pore in Yanchang-6 oil formation in Ordos Basin were studied based on scanning electron microscope image and energy spectrum analysis. The intercrystalline pore parameters were quantified, and the intercrystalline pores of different types of clay minerals were characterized qualitatively and quantitatively. On this basis, the contribution of different types of clay minerals to reservoir porosity was calculated according to the mineral content, and the mechanism of its influence on the physical properties of tight reservoirs was explored. The results showed that there were significant differences in the development characteristics of different clay minerals and the characteristics of intercrystalline pores. The size trend of pore throat and facial rate of clay minerals was illite/smectite formation > chlorite > illite. Clay mineral development characteristics and pore structure were the main influencing factors of reservoir physical properties and residual oil distribution.

Key words: tight sandstone reservoir, clay minerals, intercrystalline pore, quantitative characterization, reservoir property, Ordos Basin, Yangchang Formation

摘要：

针对致密砂岩储层黏土矿物晶间孔隙定量表征不足的问题, 以扫描电子显微镜图像和EDS能谱分析资料为基础, 研究鄂尔多斯盆地延长组长6油层组黏土矿物及晶间孔隙的发育特征, 将晶间孔参数定量化, 对不同类型黏土矿物晶间孔进行定性与定量结合表征。在此基础上, 根据矿物含量计算不同类型黏土矿物对储层孔隙度的贡献, 探究其对致密砂岩储层物性参数的影响机制。结果表明, 不同黏土矿物的发育特征及晶间孔特征有较大的差异; 黏土矿物的孔喉和面孔率大小趋势为伊蒙混层>绿泥石>伊利石, 类圆状孔隙和孔隙缩小型喉道发育较广泛; 黏土矿物发育特征和孔隙结构是储层物性及剩余油分布的主要影响因素。

关键词: 致密砂岩储层, 黏土矿物, 晶间孔隙, 定量表征, 储层物性, 鄂尔多斯盆地, 延长组

WANG He, SHI Yongmin, ZHANG Zhiqiang, SUN Tong, SHI Shiyuan, GUAN Ping, XU Dawei.

Characteristics of Nano-pores of Clay Minerals in Tight Reservoirs and Their Effects on Reservoir Properties: A Case Study of Yanchang-6 Oil Formation in Ordos Basin

[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2020, 56(4): 659-666.

汪贺, 师永民, 张志强, 孙彤, 史世元, 关平, 徐大卫.

致密砂岩储层黏土矿物晶间孔隙特征及其对物性影响的研究——以鄂尔多斯盆地延长组长6油层组为例

[J]. 北京大学学报自然科学版, 2020, 56(4): 659-666.

[1]	WANG Qian, SHEN Xiaoxue, CAO Ye, LI Ruili. Characteristics and Influencing Factors of Mineral Composition of Urban Mangrove Sediments [J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2022, 58(2): 282-290.
[2]	WANG Enze, WU Zhongbao, SONG Yanchen, SHI Kaibo, LIU Hangyu, LIU Bo. Pore Structure and Diagenetic Evolution Features of Member-7 of Yanchang Formation in Qingcheng Area, Ordos Basin, NW China [J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2022, 58(2): 249-260.
[3]	GUO Chun’an, GUAN Ping, SHI Yongmin, DU Shuheng. Identification and Prediction of “Sweet Spots” in Tight Sandstone Reservoirs Based on Logging Curve Dimensionless Rendezvous Method [J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2020, 56(2): 262-270.
[4]	CHAI Guangsheng, SHI Yongmin, DU Shuheng, WEI Yun, ZHANG Zhiqiang, GUO Chun’an, SUN Tong. Sensitivity Evaluation and Influencing Factors Analysis of Tight Sandstone Reservoirs: A Case Study of the Chang-8 Reservoir in Yanchi Area of Ordos Basin [J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2020, 56(2): 253-261.
[5]	LIU Yuyang, PAN Mao, LIU Shiqi, SHI Yongmin, DONG Yue, ZHANG Zhiqiang, WANG Ziyuan. Comprehensive Depositional System and Reservoir Characterization Study of Chang 4+5 Reservoir of Yanchang Group, Infill Well Region in Baiyushan Area, Ordos Basin [J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2018, 54(5): 1028-1038.
[6]	LU Xiangwei, DU Shuheng, ZHENG Kui, ZHANG Huanguo,WANG He, SUN Tong. Stress Criterion of Effective Development on Yanchang Formation Reservoir in Jing’an Area, Ordos Basin [J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2018, 54(3): 573-578.
[7]	JIN Wenqi, DU Shuheng, LU Xiangwei, WU Zhiyu, SHI Yongmin. Revelation on Remaining Oil Excavation from Stress Interlayer Division in Special Low Permeability Reservoir: Take Yanchang Formation of Baiyushan Reservoir in Ordos Basin as an Example [J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2016, 52(6): 1034-1040.
[8]	ZHANG Zhiqiang, SHI Yongmin, BU Xiangqian, LIANG Yaohuan, ZHANG Enyu. A Study of in-situ Stress Direction Change during Waterflooding in the Low Permeability Reservoirs [J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2016, 52(5): 861-870.
[9]	ZHAO Wentao, HOU Guiting, ZHANG Juzeng, FENG Shengbin, JU Wei, YOU Yuan, YU Xuan, ZHAN Yan. Study on the Development Law of Structural Fractures of Yanchang Formation in Longdong Area, Ordos Basin [J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2015, 51(6): 1047-1058.
[10]	YANG Shengbin,GUO Qingyin,HOU Guiting,SUN Ye. Subsidence History and Sedimentary Response in the North of Western Ordos Basin [J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2006, 42(2): 192-198.
[11]	CHEN Tao,WANG Hejin,ZHANG Zuqing,WANG Huan. An Approach to Paleoclimate-Reconstruction by Clay Minerals [J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2005, 41(2): 309-316.

Characteristics of Nano-pores of Clay Minerals in Tight Reservoirs and Their Effects on Reservoir Properties: A Case Study of Yanchang-6 Oil Formation in Ordos Basin

致密砂岩储层黏土矿物晶间孔隙特征及其对物性影响的研究——以鄂尔多斯盆地延长组长6油层组为例

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 11

Recommended Articles

Metrics