基于乳状液渗流机理的三元复合体系设计方法及应用

doi:10.3969/j.issn.1006-6535.2021.02.022

特种油气藏 ›› 2021, Vol. 28 ›› Issue (2): 144-149.DOI: 10.3969/j.issn.1006-6535.2021.02.022

基于乳状液渗流机理的三元复合体系设计方法及应用

岳青

中国石油大庆油田有限责任公司,黑龙江大庆 163000

收稿日期:2020-03-31 修回日期:2020-12-16 出版日期:2021-04-25 发布日期:2022-02-16
作者简介:岳青(1988—),男,工程师,2010年毕业于中国石油大学(北京)石油工程专业,2017年毕业于东北石油大学地质工程专业,获硕士学位,现从事三元复合驱开发调整工作。
基金资助:
国家科技重大专项“大型油气田及煤层气开发”子课题“大庆长垣特高含水油田提高采收率示范工程”(2016ZX05054)

Design Method and Application of ASP Flooding System Based on Emulsion Seepage Mechanism

Yue Qing

Petrochina Daqing Oil Field Company CO.Ltd., Daqing, Heilongjiang 163000, China

Received:2020-03-31 Revised:2020-12-16 Online:2021-04-25 Published:2022-02-16

摘要/Abstract

摘要： 大庆油田ASP(碱、表面活性剂、聚合物)三元复合驱矿场试验实施过程中,原油采出液出现了严重乳化现象,且乳状液的运移规律及其对提高采收率影响程度不明确。因此,开展长岩心模型实验,明确了乳状液渗流及驱油机理。结果表明:按照实际三元复合体系配方注入,随着运移距离的增加,乳化能力不断减弱,0.40倍孔隙体积时产生乳化段塞,0.60倍孔隙体积时乳化结束,乳化段塞长度为0.20倍孔隙体积。驱油实验显示,最佳的驱油段塞尺寸为0.30倍孔隙体积,实际乳化段塞未达到最佳尺寸,需要延长三元复合体系注入。实验真实反应了地层条件下三元复合驱乳化过程,明确了乳化规律以及乳状液段塞对驱油效果影响程度,对现场段塞设计和调整具有重要的指导意义。

关键词: 三元复合驱, 乳状液, 运移规律, 长岩心模型

Abstract: In the field experiment of ASP (alkali, surfactant, polymer) flooding in Daqing Oilfield, the produced liquid of crude oil was seriously emulsified, but the migration law of the produced emulsion and its effect on enhancing recovery efficiency are unclear. Therefore, the long core model experiment was conducted to clarify the mechanism of emulsion seepage and flooding. The results show that after injection based on the actual formula of ASP flooding system, the emulsifying capacity was continuously weakened with the increase of the migration distance, the emulsifying slug was produced when the pore volume was 0.40 time and ended when the pore volume was 0.60 time, and the length of the emulsifying slug was 0.20 time the pore volume. The results of flooding experiment show that the optimal displacement slug size was 0.30 time the pore volume, and the actual emulsifying slug did not reach the optimal size, so the injection time of ASP system should be extended. The experiment truly reflected the emulsification process of the ASP flooding under the formation conditions, and clarified the emulsification law and the influence of the emulsion slug on the flooding effect, with important guiding significance for on-site adjustment.

Key words: ASP flooding, emulsion, migration law, long core model

中图分类号:

TE357

岳青. 基于乳状液渗流机理的三元复合体系设计方法及应用[J]. 特种油气藏, 2021, 28(2): 144-149.

Yue Qing. Design Method and Application of ASP Flooding System Based on Emulsion Seepage Mechanism[J]. Special Oil & Gas Reservoirs, 2021, 28(2): 144-149.

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基于乳状液渗流机理的三元复合体系设计方法及应用

Design Method and Application of ASP Flooding System Based on Emulsion Seepage Mechanism

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