聚合物驱及其对提高采收率的影响,以上阿萨姆盆地为例

Q1 Earth and Planetary Sciences
Kalpajit Hazarika , Subrata Borgohain Gogoi , Amit Kumar
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引用次数: 9

摘要

随着能源危机的加剧和恐慌,化学采油技术越来越受到关注。聚合物驱的成功应用取决于对注入段塞在储层条件下的流变和溶液性质的评估,这是聚合物浓度、盐度、温度和剪切速率的函数。聚丙烯酰胺(PAM)是聚合物驱油技术中常用的聚合物。然而,在选择合适的CEOR聚合物时,需要与黄原胶(XG)等其他聚合物进行比较研究。在本研究中,评估了PAM和XG作为聚合物作为化学提高采收率剂在上阿萨姆邦盆地三期聚合物驱中的采收率。对PAM和XG的流变性能进行了比较研究。聚合物驱岩心驱油实验也进行了测试,以确定PAM和XG聚合物溶液的采收率。结果表明,由于聚合物主链中存在疏水缔合,这些聚合物表现出良好的耐盐性、耐温性和剪切后的可恢复粘度、合理的增稠行为以及改善的增粘性能。聚合物驱岩心驱油实验也进行了测试,以确定PAM和XG聚合物溶液的采收率。结果表明,宏观波及效率是采收率的主导因素。而将水凝胶聚合物注射到储层是为了增加含水流体的粘度,使得流体比油更难流动,因此,油产量增加。在PAM的情况下观察到剪切减薄行为,表明锋面推进理论占主导地位。由于PAM似乎遵循活塞式运动和前沿推进理论,它可以有效地提高宏观扫掠效率和微观驱替效率。PAM驱的OOIP总回收率为53%。XG聚合物驱的总采收率为45%,表明其效率低于PAM。项目的成功也取决于成本分析。计算机建模小组(CMG)也进行了模拟研究,以验证实验结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Polymer flooding and its effects on enhanced oil recovery special reference to Upper Assam Basin

Chemical Enhance oil Recovery (CEOR) technology is getting more attention since energy crises are getting worse and frightened. Successful application of polymer flooding depends on the evaluation of rheological and solution properties of injected slug at reservoir conditions, which is function of polymer concentration, salinity, temperature and shear rate. Poly acryl amide (PAM) is commonly used polymer in polymer flooding technique. However, comparative study with other polymers such as xanthan gum (XG) is required while selection of appropriate polymer for CEOR. In present study, the recovery efficiency of PAM and XG as a polymer has been evaluated for application as chemical EOR agent for tertiary phase polymer flooding in Upper Assam basin. The comparative study between PAM and XG has been done in terms of rheological properties. Core flooding experiment of polymer flooding has also been tested to determine the recovery efficiency of the PAM and XG polymer solutions. The results showed that these polymers exhibit favorable salt tolerance, temperature resistance, and recoverable viscosity after shearing, reasonable thickening behavior and improved viscosity enhancement properties due to presence of hydrophobic association in the polymer main chains. Core flooding experiment of polymer flooding has also been tested to determine the recovery efficiency of the PAM and XG polymer solutions. Results show that macroscopic sweep efficiency is the dominant factor during recovery. While an injection of hydrogel polymer to the reservoir is to increase a viscosity of fluid containing water so that the fluid is more difficult to flow than the oil, and as a result, the oil production increases. Shear thinning behavior was observed in case of PAM indicating predominance of the frontal advance theory. As PAM seems to be following both piston like movement and frontal advance theory it can be efficiently enhancing the macroscopic sweep efficiency as well as microscopic displacement efficiency. The overall recovery efficiency of 53% of OOIP was determined for PAM flooding. The overall recovery efficiency by XG polymer flooding was found to be 45%, signifying its lesser efficiency in comparison to PAM. Success of the projects also depends on cost analysis. Simulation by Computer Modelling Group (CMG) study has also been carried out to validate the experimental findings.

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来源期刊
Petroleum Research
Petroleum Research Earth and Planetary Sciences-Geology
CiteScore
7.10
自引率
0.00%
发文量
90
审稿时长
35 weeks
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