稠油油藏空气辅助微生物驱稠化营养激活体系评价及应用

doi:10.3969/j.issn.1006-6535.2025.04.012

特种油气藏 ›› 2025, Vol. 32 ›› Issue (4): 104-111.DOI: 10.3969/j.issn.1006-6535.2025.04.012

稠油油藏空气辅助微生物驱稠化营养激活体系评价及应用

刘晓丽^1,2, 李阳¹, 白雷^1,2, 马艳清², 马挺³, 姜振学¹, 万云洋¹

1.中国石油大学(北京),北京 102249;
2.中国石油新疆油田分公司,新疆克拉玛依 834000;
3.南开大学,天津 300071

收稿日期:2024-06-25 修回日期:2025-05-14 出版日期:2025-08-25 发布日期:2025-09-03
作者简介:刘晓丽(1983—),女,高级工程师,2005年毕业于复旦大学生物科学专业,现为中国石油大学(北京)石油与天然气工程专业在读博士研究生,主要从事油田化学与提高采收率方面的研究。
基金资助:
国家自然科学基金“新疆砾岩油藏采油功能菌运移代谢规律及其驱油机理研究”(U2003128)

Evaluation and application of an air-assisted microbial flooding thickening nutrient activation system for heavy oil reservoirs

LIU Xiaoli^1,2, LI Yang¹, BAI Lei^1,2, MA Yanqing², MA Ting³, JIANG Zhenxue¹, WAN Yunyang¹

1. China University of Petroleum (Beijing), Beijing 102249, China;
2. PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China;
3. Nankai University, Tianjin 300071, China

Received:2024-06-25 Revised:2025-05-14 Online:2025-08-25 Published:2025-09-03

摘要/Abstract

摘要： 新疆L-9油藏是具有边底水的薄层砂岩普通稠油油藏,受边底水及CaCl₂水型的影响,常规的化学驱体系并不适用。针对该问题,开展了空气辅助微生物驱提高采收率现场试验。试验过程中,为了抑制底水锥进及高渗通道水窜,扩大微生物驱波及体积,利用油藏精细地质建模、示踪剂监测数值模拟技术识别了水流优势通道,证实了水窜通道两侧剩余油饱和度高,评价了以生物多糖为主的稠化营养激活体系与现场回注污水和地层水的兼容性、体系对主要采油功能菌的激活效果及激活过程中微生物群落结构的变化规律。结果表明:未添加激活剂的稠化营养体系表现出较高的黏度和稳定性,岩心封堵率可达93.1%,提高采收率15.5个百分点;在添加激活剂后,采油功能基因及总菌浓度增加了1~2个数量级,促进了稠化体系的降解;注入稠化营养激活体系后,高渗通道得到有效封堵,增油降水效果良好。该研究对高含水期稠油油藏微生物驱过程中配套调控具有指导意义。

关键词: 微生物驱, 稠油, 稠化营养体系, 边水, 底水, CaCl₂水型

Abstract: The L-9 Reservoir in Xinjiang is a thin-layer sandstone ordinary heavy oil reservoir with edge and bottom water. Due to the influence of edge/bottom water and CaCl₂ water type, conventional chemical flooding systems are not applicable. To address this, a field test of air-assisted microbial flooding was carried out for enhanced oil recovery. During the test, to curb bottom-water coning and water channeling in high-permeability channels, and to expand the sweep volume of microbial flooding, reservoir fine geological modeling, and tracer monitoring numerical simulation techniques were used to identify preferential migration pathways. It was found that the remaining oil saturation was high on both sides of these pathways. Then, the compatibility of the thickening nutrient activation system (mainly bio-polysaccharides) with the reinjected wastewater on site and formation water was assessed. Also, the activation effect of the system on major oil-producing bacteria and the rule of changes in microbial community structure during activation were studied. The results show that The thickening nutrient activation system without additives shows high viscosity and stability, with a core plugging rate of 93.1% and an enhanced oil recovery of 15.5 percentage points. After adding the activator, the concentration of oil-producing function genes and total bacteria increased by 1-2 orders of magnitude, promoting the degradation of the thickening system. After injecting the thickening nutrient activation system, high-permeability channels were effectively blocked, achieving good oil-increase and water-reduction effects. This research offers useful guidance for the regulation of microbial flooding in heavy-oil reservoirs during the high-water-cut period.

Key words: microbial flooding, heavy oil, thickening nutrient system, edge water, bottom water, CaCl₂ water type

中图分类号:

刘晓丽, 李阳, 白雷, 马艳清, 马挺, 姜振学, 万云洋. 稠油油藏空气辅助微生物驱稠化营养激活体系评价及应用[J]. 特种油气藏, 2025, 32(4): 104-111.

LIU Xiaoli, LI Yang, BAI Lei, MA Yanqing, MA Ting, JIANG Zhenxue, WAN Yunyang. Evaluation and application of an air-assisted microbial flooding thickening nutrient activation system for heavy oil reservoirs[J]. Special Oil & Gas Reservoirs, 2025, 32(4): 104-111.

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稠油油藏空气辅助微生物驱稠化营养激活体系评价及应用

Evaluation and application of an air-assisted microbial flooding thickening nutrient activation system for heavy oil reservoirs

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