| 弱凝胶对油水相对渗透率的影响 |
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| 引用本文： | 朱怀江,刘玉章,绳德强,胡频. 弱凝胶对油水相对渗透率的影响[J]. 石油学报, 2002, 23(3): 69-72. DOI: 10.7623/syxb200203015 |
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| 作者姓名： | 朱怀江 刘玉章 绳德强 胡频 |
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| 作者单位： | 1. 中国石油勘探开发研究院采油所, 北京, 100083;2. 河南油田勘探开发研究院, 河南南阳, 473132 |
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| 基金项目： | 中国石油化工集团公司重点科技攻关项目 (P990 31 ) |
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| 摘 要： | 在凝胶处理后,油/水相相对渗透率均大幅度下降,可动饱和度范围明显缩小,弱凝胶的易屈服性导致渗透率随流速增加而上升.凝胶处理使油/水相渗透率产生不均衡减少是由于油在通过凝胶时部分残余油占据的孔隙形成了新的流动通道;但水驱时,由于油/水界面张力较高,残余油形成的大部分通道关闭.所以,在同样的驱动力下油/水通过凝胶处理后的含油地层时,油相渗透率高于水相渗透率.
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| 关 键 词： | 弱凝胶 相对渗透率 深部液流转向 聚丙烯酰胺 提高采收率 |
| 文章编号： | 0253-2697(2002)03-0069-04 |
| 收稿时间： | 2001-01-31 |
| 修稿时间： | 2001-01-31 |
EFFECT OF WEAK GELS ON OIL/WATER RELATIVE PERMEABILITY |
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| ZHU Huaijiang,et al.. EFFECT OF WEAK GELS ON OIL/WATER RELATIVE PERMEABILITY[J]. Acta Petrolei Sinica, 2002, 23(3): 69-72. DOI: 10.7623/syxb200203015 |
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| Authors: | ZHU Huaijiang et al. |
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| Affiliation: | Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China |
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| Abstract: | The oil/water relative permeability (K ro /K rw ) decreases significantly and the range of movable saturation becomes narrow after the gel treatment in oil_bearing porous medium.The permeability of each phase rises with the increase of flow rate because the weak gel is easy to yield and deform.One of the mechanisms for disproportionate permeability reduction (DPR) is that a new flow path will be produced with the residual oil when oil flows through oil_bearing porous medium treated by the gel.But in water flooding,most paths formed by residual oil will be in shutdown due to high interfacial tension between oil/water phase.Therefore,K ro is higher than K rw when fluids flow through at the same pressure. |
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| Keywords: | weak gel relative permeability flowing direction turn about in deep reservoir polymer enhanced oil recovery |
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