东篱科研大数据发现系统（DRDS）

位置：成果数据库 > 期刊 > 期刊详情页

聚合物溶液在油藏中的实际黏度和黏度损失率

ISSN号：1000-3754
期刊名称：《大庆石油地质与开发》
时间：0
分类：TE357.46[石油与天然气工程—油气田开发工程]
作者机构：[1]中国石油大学石油工程教育部重点实验室,北京昌平102249
相关基金：国家重点基础研究发展计划“化学驱和微生物驱提高石油采收率的基础研究”（2005CB221300）和国家自然科学基金项目“聚合物溶液微尺度流动探索研究”（50574060）的部分成果.

关键词：流变性, 多孔介质, 视黏度, 驱油效率, 黏度损失, rheology, porous media , apparent viscosity , displacement efficiency , viscosity loss

中文摘要：

通过多测点岩心物模实验，研究了聚合物驱中聚合物溶液在油藏中的实际黏度及黏度损失率沿注入井向生产井方向的变化规律。分析了相对分子质量、浓度和岩心渗透率等因素对聚合物在油藏中黏度损失率的影响。研究结果表明，相对分子质量和浓度不同聚合物溶液在油藏深部黏度损失程度不同。对于中低相对分子质量聚合物溶液，当沿着生产井方向渗流时，实际黏度不断降低，黏度损失率不断增加，并最终达到平稳。相对分子质量越高、浓度越高，岩心的渗透率越低，黏度损失越严重。相对分子质量800万、浓度1200mg／L聚合物溶液在渗透率为119．60×10^-3μm。的储层中流动（流速1m／d），距注入井1／3井距处，黏度损失率为85％。相对分子质量400万、浓度1200mg／L聚合物溶液在渗透率为106．73×10^-3μm^2、54．24×10^-2μm^2、19．63×10^-3μm^2的储层中流动，距注入井1／3井距处，黏度损失率分别为41％、51％和78％。在评价聚合物驱油效果和设计注聚相关参数时，应以聚合物溶液在油藏深部的实际黏度为依据。

英文摘要：

Through multi-measuring point core physical analog test, this paper analyzes alternation law of actual viscosity and viscosity loss rate of polymer solution in the reservoir from injectors to producers, as well as the influence of molecular weight, concentration and core permeability on viscosity loss rate. Result shows that polymer solution with diversified molecular weights and concentrations have different viscosity loss rates. As for the polymer solution with medium and low molecular weights investigated in this paper, when polymer solution flows along pro- ducers, its actual viscosity will gradually decrease and viscosity loss rate keeps increasing until it reaches equality. The higher the molecular weight and the concentration are, the lower the core permeability is. At the same time, flowing in reservoir with permeability of 119.60 × 10^-3 μm^2 has viscosity loss rate of 85% within 1/3 well spacing of injector. Polymer solution with molecular weight of 400 × 10^4 and concentration of 1200 mg/L flowing in reservoir with permeability of 106. 73 × 10^ -3 μm^2, 54. 24 × 10 ^-3μm^2 and 19. 63 × 10^ -3μm^2 has viscosity loss rate of 41%, 51% and 78% within 1/3 well spacing of injector, respectively. During the evaluation of polymer displacement effect and the design of relevant parameters of polymer flooding, actual viscosity of polymer solution in deep reservoir should be considered as the basis of study.

同期刊论文项目