松辽盆地低渗透储层孔隙结构及分形特征

doi:10.3969/j.issn.1006-6535.2022.01.009

特种油气藏 ›› 2022, Vol. 29 ›› Issue (1): 59-65.DOI: 10.3969/j.issn.1006-6535.2022.01.009

松辽盆地低渗透储层孔隙结构及分形特征

吕天雪¹, 张国一², 易立新¹, 李忠诚², 宋鹏², 李思圻³

1.南开大学,天津 300350;
2.中国石油吉林油田分公司,吉林松原 138000;
3.中国石油辽河油田分公司,辽宁盘锦 124010

收稿日期:2021-03-24 修回日期:2021-11-07 出版日期:2022-02-25 发布日期:2023-01-10
通讯作者: 易立新(1964—),男,教授, 1985年毕业于华东地质学院水文地质工程专业, 2001年毕业于中国地震局地质研究所,获博士学位,现主要从事同位素水文学方面研究工作。
作者简介:吕天雪(1993—),女,在读博士,2016年毕业于西南石油大学资源勘查工程,现为南开大学环境工程专业博士研究生,主要从事同位素水文学方面研究工作。
基金资助:
中国石油天然气股份有限公司重大专项“松辽盆地深部含油气系统研究”(2021DJ0205)

Pore Structure and Fractal Characteristics of Low-permeability Reservoirs in Songliao Basin

Lyu Tianxue¹, Zhang Guoyi², Yi Lixin¹, Li Zhongcheng², Song Peng², Li Siqi³

1. Nankai university,Tianjing 300350, China;
2. PetroChina Jilin Oilfield Company, Songyuan, Jilin 138000, China;
3. PetroChina Liaohe Oilfield Company, Panjin, Liaoning 124010, China

Received:2021-03-24 Revised:2021-11-07 Online:2022-02-25 Published:2023-01-10

摘要/Abstract

摘要： 针对松辽盆地王府断陷泉头组低渗透储层孔隙结构认识不清的问题,运用储层孔隙分形方法,结合X射线衍射、铸体薄片、扫描电镜以及压汞等实验方法,确定了该低渗透砂岩储层的孔隙分型特征,并讨论了分形维数与储层物性、储层矿物组分之间的关系。实验结果表明:该地区储层孔隙以粒间孔和粒内溶孔为主;矿物成分主要为石英和长石;储层孔隙具有多重分形特征,小孔隙的孔隙结构优于中、大孔隙;分形维数与储层孔隙度无关,与渗透率、矿物成分均有良好的相关性。该研究从多重分形理论角度揭示了低渗透储层的孔径分布特征,可为松辽盆地王府断陷泉头组低渗透储层开发提供依据。

关键词: 低渗透储层, 孔隙结构, 矿物成分, 压汞实验, 分形维数

Abstract: To address the problem of unclear understanding of the pore structure of low-permeability reservoirs in Quantou Formation, Wangfu Fault Depression, Songliao Basin, the fractal method of reservoir pores was applied in combination with experimental methods such as X-ray diffraction, casting slice, scanning electron microscopy, and mercury intrusion porosimetry, to determine the pore fractal characteristics of the low-permeability sandstone reservoir and discuss the relationship between the fractal dimension and the physical properties and mineral composition of the reservoir. The experimental results showed that: the pores of the reservoir in this area were mainly intergranular pores and intragranular dissolved pores; the mineral components were mainly quartz and feldspar; the pores of the reservoir were of multiple fractal characteristics, and the structure of small pores was better than that of medium and large pores; the fractal dimension was unrelated to the reservoir porosity, but closely correlated with permeability and mineral composition. This study discovers the pore size distribution characteristics of low-permeability reservoirs from the perspective of multiple fractal theory, and provides a basis for the development of low-permeability reservoirs in Quantou Formation, Wangfu Fault Depression, Songliao Basin.

Key words: low-permeability reservoir, pore structure, mineral composition, mercury intrusion porosimetry test, fractal dimension

中图分类号:

TE122

吕天雪, 张国一, 易立新, 李忠诚, 宋鹏, 李思圻. 松辽盆地低渗透储层孔隙结构及分形特征[J]. 特种油气藏, 2022, 29(1): 59-65.

Lyu Tianxue, Zhang Guoyi, Yi Lixin, Li Zhongcheng, Song Peng, Li Siqi. Pore Structure and Fractal Characteristics of Low-permeability Reservoirs in Songliao Basin[J]. Special Oil & Gas Reservoirs, 2022, 29(1): 59-65.

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松辽盆地低渗透储层孔隙结构及分形特征

Pore Structure and Fractal Characteristics of Low-permeability Reservoirs in Songliao Basin

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