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首页» 过刊浏览» 2022» Vol.7» Issue(3) 406-419     DOI : 10.3969/j.issn.2096-1693.2022.03.035
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致密砂岩储层孔喉结构研究进展
刘广峰,王连鹤,孙仲博,王俊涛,姜帆
1 中国石油大学(北京)油气资源与探测国家重点实验室,北京 102249 2 中国石油大学(北京)气体能源开发与利用教育部工程研究中心,北京 102249 3 中国石油长庆油田公司油气工艺研究院,西安 710018
Research progress of pore-throat structure in tight sandstone formation
LIU Guangfeng, WANG Lianhe, SUN Zhongbo, WANG Juntao, JIANG Fan
1 State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum-Beijing, Beijing 102249, China 2 Engineering Research Center of Gas Resource Development and Utilization of Ministry of Education, China University of Petroleum-Beijing, Beijing 102249, China 3 Research Institute of Oil and Gas Technology, PetroChina Changqing Oilfield Company, Xi’an 710018, China

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摘要  致密砂岩储层复杂的孔喉结构决定了储层的物性和油气开采效果,大 量存在的小喉道及其所连通的孔隙动用程度是致密砂岩储层高效开 发的关键。该图展示了不同致密砂岩储层孔喉系统的储集能力,基于 调节流体界面张力、改善润湿性及提高流度等原理开展的表面活性剂 驱、空气驱等室内研究,有效降低了可动喉道半径下限。
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关键词 : 致密砂岩;孔喉结构;分析技术;表征方法;动态孔喉结构;可动喉道半径
Abstract

The physical properties and the seepage characteristics of oil, gas and water in tight sandstone reservoir are significantly determined by occurrence, size distribution and connectivity of pore-throat structure. In this paper, the principle, characteristics and applicability of image analysis technology and inversion analysis technology including 10 kinds of the main pore-throat structure analytical techniques were summarized; the characteristics and characterizing methods of pore-throat size, fractal, connectivity and network structure were analyzed; and the research tendency of dynamic pore-throat structure characteristics based on various stress and enhance oil recovery technology based on pore-throat structure characteristics was estimated. Due to the complexity of pore-throat size distribution and pore-throat structure of tight sandstone, a variety of testing techniques and characterization methods should be adopted to achieve the comprehensive and accurate determination of pore-throat structure. During the development, as a decrease of reservoir pressure, the pore-throat structure changes dynamically. Moreover, the seepage and development are determined by the large throats and pore volume connected by large throats. Decreasing the cutoff throat radius is an important way to improve the sweep efficiency of throat and the development efficiency of tight reservoir. The characterization method of dynamic pore-throat structure and its corresponding seepage characteristics as well as the method to decrease the cutoff throat radius still need to be further studied in the future.

Key words: tight sandstone formation; pore-throat structure; testing technique; characterization method; dynamic pore-throat structure; movable throat radius
收稿日期: 2022-09-29     
PACS:    
基金资助:国家自然科学基金项目“致密砂岩脆性控制机理与声发射评价方法研究”(51404282) 和中国石油大学( 北京) 科研基金“气体能源开发与 利用教育部工程研究中心”(ZX20200060) 联合资助
通讯作者: lgf@cup.edu.cn
引用本文:   
刘广峰, 王连鹤, 孙仲博, 王俊涛, 姜帆. 致密砂岩储层孔喉结构研究进展. 石油科学通报, 2022, 03: 406-419
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