稠油油藏水气交替诱导泡沫油冷采提高采收率实验

doi:10.3969/j.issn.1006-6535.2024.01.013

特种油气藏 ›› 2024, Vol. 31 ›› Issue (1): 101-108.DOI: 10.3969/j.issn.1006-6535.2024.01.013

稠油油藏水气交替诱导泡沫油冷采提高采收率实验

甄贵男¹, 王健², 吴宝成¹, 王炜龙¹, 唐杨², 路宇豪²

1.中国石油新疆油田分公司,新疆昌吉 831700;
2.西南石油大学油气藏地质及开发工程全国重点实验室,四川成都 610500

收稿日期:2022-07-04 修回日期:2024-01-10 出版日期:2024-02-25 发布日期:2024-04-18
通讯作者: 王健(1966—),男,教授,1990年毕业于西安石油学院采油工程专业,1999年毕业于西南石油学院油气田开发工程专业,获博士学位,现从事提高采收率技术研究工作。
作者简介:甄贵男(1986—),男,高级工程师,2008年毕业于哈尔滨理工大学网络工程专业,2012年毕业于东北石油大学油气田开发工程专业,获硕士学位,现从事油气田开发研究工作。
基金资助:
国家自然科学基金面上项目“气溶性活性剂辅助稠油冷采的泡沫油组分传质及界面膜研究”(52174035)

Enhanced Oil Recovery Experiment of Foam Oil Cold Recovery Induced by Water-Alternating-Gas Injection in Heavy Oil Reservoirs

Zhen Guinan¹, Wang Jian², Wu Baocheng¹, Wang Weilong¹, Tang Yang², Lu Yuhao²

1. PetroChina Xinjiang Oilfield Company, Changji, Xinjiang 831700, China;
2. National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu,Sichuan 610500, China

Received:2022-07-04 Revised:2024-01-10 Online:2024-02-25 Published:2024-04-18

摘要/Abstract

摘要： 针对普通稠油油藏水驱过程中存在的黏性指进、动用不充分、采出程度低等问题,基于新疆油田吉7油藏开展了水气交替诱导泡沫油冷采技术研究,自行设计泡沫油配样装置,通过Image J软件对泡沫油图像进行表征,对泡沫油的性能、泡径、泡沫数量进行综合分析;设计制作可视化平面模型,开展稠油注气辅助水驱的泡沫油微观驱油机理研究;开展岩心驱替实验,优化水气交替诱导泡沫油冷采的注入参数。研究表明:CO₂在低黏原油中形成的泡沫油性能更好,发泡体积为202.1 mL,半衰期为324 s,降黏率为32.35%;泡沫油的发泡体积和半衰期通常与泡径和泡沫油数量呈负相关关系;泡沫油聚并对黏壁残余油有剥离作用,CO₂能够有效动用小孔喉原油、油膜和上层原油;在气液比为1∶1、注入压力为30 MPa、驱替速度为0.2 mL/min的条件下,水气交替诱导泡沫油冷采较普通稠油水驱可提高采收率18.90%。研究成果为新疆油田吉7油藏水气交替诱导泡沫油冷采技术提供了理论依据,也为其他油田水驱稠油油藏提高采收率技术提供了参考。

关键词: 普通稠油, 泡沫油, 泡径计算, 微观驱油机理, 参数优化, 冷采, 低碳, 吉7油藏

Abstract: Aiming at the problems of viscous indexing, insufficient producing, and low recovery in the process of water flooding in ordinary heavy oil reservoirs, based on Ji 7 Reservoir in Xinjiang Oilfield, the foam oil cold recovery technology was researched induced by water-alternating-gas injection, and the foam oil sample preparation device was designed by itself. The image of foam oil was characterized by Image J software, and the performance, bubble diameter, and foam number of foam oil were comprehensively analyzed; the visual plane model was designed and made to research the microscopic oil displacement mechanism of foam oil during gas injection assisted water flooding in heavy oil reservoir; the core displacement experiment was carried out to optimize the injection parameters of foam oil cold recovery induced by water-alternating-gas. The research shows that the foam oil formed by CO₂ in low-viscosity crude oil has better performance; the foaming volume is 202.1 mL, the half-life is 324 s, and the viscosity reduction rate is 32.35%; the foaming volume and half-life of foam oil are usually negatively correlated with the bubble diameter and the number of foam oil; the foam oil polymerization has a stripping effect on viscous wall residual oil, and CO₂ can effectively produce crude oil, oil film, and upper crude oil in small pore throat; under the condition of the gas-liquid ratio of 1∶1, the injection pressure of 30 MPa, and flooding rate of 0.2 mL/min, the foam oil cold recovery induced by water-alternating-gas could improve recovery by 18.90% compared with the ordinary water flooding in the heavy oil reservoir. The research results provide a theoretical basis for the foam oil cold recovery induced by water-alternating-gas injection in Ji 7 reservoir of Xinjiang Oilfield and also provide a reference for the enhanced oil recovery technology of water flooding heavy oil reservoirs in other oilfields.

Key words: ordinary heavy oil, foam oil, bubble diameter calculation, microscopic oil displacement mechanism, parameter optimization, Ji 7 reservoir

中图分类号:

TE357.7

甄贵男, 王健, 吴宝成, 王炜龙, 唐杨, 路宇豪. 稠油油藏水气交替诱导泡沫油冷采提高采收率实验[J]. 特种油气藏, 2024, 31(1): 101-108.

Zhen Guinan, Wang Jian, Wu Baocheng, Wang Weilong, Tang Yang, Lu Yuhao. Enhanced Oil Recovery Experiment of Foam Oil Cold Recovery Induced by Water-Alternating-Gas Injection in Heavy Oil Reservoirs[J]. Special Oil & Gas Reservoirs, 2024, 31(1): 101-108.

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稠油油藏水气交替诱导泡沫油冷采提高采收率实验

Enhanced Oil Recovery Experiment of Foam Oil Cold Recovery Induced by Water-Alternating-Gas Injection in Heavy Oil Reservoirs

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