裂缝储层空气泡沫驱注入参数优化实验

陈小东; 郭红霞; 陈霖; 王进; 曲春霞; 曹立坤; 陆建峰

doi:10.3969/j.issn.1006-6535.2022.03.016

特种油气藏 >

2022 , Vol. 29 >Issue 3: 112 - 117

DOI: https://doi.org/10.3969/j.issn.1006-6535.2022.03.016

油藏工程

裂缝储层空气泡沫驱注入参数优化实验

陈小东 ,
郭红霞 ,
陈霖 ,
王进 ,
曲春霞 ,
曹立坤 ,
陆建峰

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1.中国石油长庆油田分公司,陕西西安 710018;
2.西安锦江能源科技有限公司,陕西西安 710065

陈小东(1986—),男,高级工程师,2008年毕业于西南石油大学资源勘查工程专业,现主要从事超低渗透油藏开发方面的研究工作。

收稿日期: 2021-05-12

修回日期: 2022-03-15

网络出版日期: 2023-01-09

基金资助

国家科技重大专项“超低渗油藏改善开发效果关键技术”(2017ZX05013004)

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Experiment on Optimization of Injection Parameters for Air-foam Flooding in Fractured Reservoirs

Chen Xiaodong ,
Guo Hongxia ,
Chen Lin ,
Wang Jin ,
Qu Chunxia ,
Cao Likun ,
Lu Jianfeng

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1. PetroChina Changqing Oilfield Company, Xi'an, Shaanxi 710018, China;
2. Xi'an Jinjiang Energy Technology Co., Ltd., Xi'an, Shaanxi 710065, China

Received date: 2021-05-12

Revised date: 2022-03-15

Online published: 2023-01-09

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摘要

为提高裂缝性油藏空气泡沫驱的采收率,以王窑中西部地区长₆段储层为研究对象,开展前期水驱、空气泡沫驱、后续水驱实验,优化气液体积比、泡沫段塞体积、注入压力、注入速率和注入时机等参数。结果表明:泡沫注入岩心后,含水率迅速降低,采出程度迅速提高,裂缝岩心相对基质岩心封堵更快,但封堵效果较差;注入空气泡沫时间越早,最终采收率越高;最优气液体积比、泡沫段塞体积、注入压力、注入速率与岩心渗透率呈负相关,但因裂缝渗透率较大,渗透率变化对最佳注入参数的敏感性较弱。该研究结果可为低渗透油藏裂缝性储层空气泡沫驱精细化注入提供重要的理论依据。

关键词： 空气泡沫驱; 注入参数; 优化; 裂缝储层; 实验

本文引用格式

陈小东 , 郭红霞 , 陈霖 , 王进 , 曲春霞 , 曹立坤 , 陆建峰 . 裂缝储层空气泡沫驱注入参数优化实验[J]. 特种油气藏, 2022 , 29(3) : 112 -117 . DOI: 10.3969/j.issn.1006-6535.2022.03.016

Abstract

In order to improve the recovery efficiency of air-foam injection flooding in fractured reservoirs, experiments of early-stage water flooding, air-foam flooding and subsequent water flooding were conducted in Chang6 Member reservoirs in the west-central area of Wangyao Block to optimize gas-liquid volume ratio, foam slug volume, injection pressure, injection rate and injection time. The results showed that, after the foam was injected into the core, the water content was decreased rapidly, the recovery percent was increased rapidly, the fractured core was plugged faster than the matrix core, but the plugging effect was poor; the earlier the air and foam were injected, the higher the final recovery efficiency; the optimal gas-liquid volume ratio, foam slug volume, injection pressure and injection rate were negatively correlated with the core permeability, and the permeability change was less sensitive to the optimal injection parameters due to high fracture permeability. The results of the study provide an important theoretical basis for fine injection of air-foam flooding in low-permeability fractured reservoirs.

Key words： air-foam flooding; injection parameters; optimization; fractured reservoir; experiment

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