| Spontaneous imbibition in asymmetric branch-like throat structures in unconventional reservoirs | |
| Shen YH; Li CX(李曹雄); Ge HK; Yang XY; Zeng XX; Li, CX (reprint author), China Univ Petr, Unconvent Nat Gas Inst, Beijing 102249, Peoples R China. | |
| Source Publication | JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
 |
| 2017-08-01 | |
| Volume | 44Pages:328-337 |
| ISSN | 1875-5100 |
| Abstract | Unconventional reservoirs, especially shale plays, have abundant micro nano pores. Large volume water was injected into the reservoir during hydraulic fracturing. Fracturing fluid can displace gas in pore spaces spontaneously, called spontaneous imbibition (SI), which has significant effects on the gas production after hydraulic fracturing. Throat structure in matrix is one of the key factors to influence SI process. In this work, at first, complex pore space is simplified as a spatial self similar branch like structure composed of several asymmetric sub throats. Then, within asymmetric branch structure, the imbibition process is calculated by a newly established mathematical model, and the influence of both pore structure and fluid characteristics, including contract angle, viscosity, surface tension, are discussed. Finally, some lab experiments, especially SI tests, are included on shale and sandstone core plugs to verify our model. Results show that the coherence in wettability between the reservoir and the fracturing fluid is important to enhance the microscopic replacement effect. Pore size also has effect influence on imbibition curve. In addition, both in models and experiments, imbibition index n is useful to describe imbibition properties of rocks. In unconventional rock samples like shale, n is less than 0.4, while high permeability sandstone, n approach to 0.5. These conclusions are useful to investigate the mechanism of spontaneous imbibition and microscopic displacement in unconventional reservoirs. (C) 2017 Elsevier B.V. All rights reserved. |
| Keyword | Unconventional Reservoir Spontaneous Imbibition Fractals |
| DOI | 10.1016/j.jngse.2017.04.022 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000404304800026 |
| WOS Keyword | FRACTAL SANDSTONE PORES ; POROUS-MEDIA ; CAPILLARY IMBIBITION ; WATER IMBIBITION ; FLOW ; MODEL ; PERMEABILITY |
| WOS Research Area | Energy & Fuels ; Engineering |
| WOS Subject | Energy & Fuels ; Engineering, Chemical |
| Funding Organization | National Natural Science Foundation of China(U1562215||Science Foundation of China University of Petroleum, Beijing(2462015YQ1202)||Sinopec scientific research project(P15026)||51490652||51604287) |
| Classification | 二类 |
| Ranking | 2 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/60636 |
| Collection | 流固耦合系统力学重点实验室 |
| Corresponding Author | Li, CX (reprint author), China Univ Petr, Unconvent Nat Gas Inst, Beijing 102249, Peoples R China. |
| Recommended Citation GB/T 7714 | Shen YH,Li CX,Ge HK,et al. Spontaneous imbibition in asymmetric branch-like throat structures in unconventional reservoirs[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2017,44:328-337. |
| APA | Shen YH,李曹雄,Ge HK,Yang XY,Zeng XX,&Li, CX .(2017).Spontaneous imbibition in asymmetric branch-like throat structures in unconventional reservoirs.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,44,328-337. |
| MLA | Shen YH,et al."Spontaneous imbibition in asymmetric branch-like throat structures in unconventional reservoirs".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 44(2017):328-337. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| JouArt-2017-071.pdf（1524KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment