考虑CO<sub>2</sub>效应的酸液滤失模型及其应用

李春月; 李勇明

doi:10.11781/sysydz2015S1118

考虑CO₂效应的酸液滤失模型及其应用

doi: 10.11781/sysydz2015S1118

李春月¹,
李勇明²

1.
中国石化西北油田分公司工程技术研究院, 乌鲁木齐 830011
2. 西南石油大学, 成都 610500

基金项目: 国家科技重大专项课题"缝洞型碳酸盐岩油藏高效酸压改造技术"(2011ZX05014-006)资助。

详细信息

作者简介:
李春月(1979-),女,硕士,工程师,从事储层改造工作,E-mail:lichy.xbsj@sinopec.com

中图分类号: TE35
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- 被引次数: 0
出版历程
- 收稿日期: 2015-08-03
- 修回日期: 2015-10-29
- 刊出日期: 2015-12-31

Acid filtration model considering CO₂ effect and its application

Li Chunyue¹,
Li Yongming²

1.
Research Institute of Engineering Technology, SINOPEC Northwest Company, Urumqi, Xinjiang 830011, China
2. Southwest Petroleum University, Chengdu, Sichuan 610500, China

摘要

摘要: 碳酸盐岩储层酸压施工过程中,酸岩反应生成CO₂。为研究CO₂对酸液滤失的影响,确定游离态CO₂的体积,在常规酸液滤失模型的基础上建立了考虑CO₂效应的酸液滤失模型。通过计算分析,得到游离态CO₂体积对酸蚀蚓孔发育和酸液滤失的影响。模拟分析表明,游离态CO₂的体积随着酸液浓度增加而增加,随缝内压力上升而减少;存在游离态CO₂的情况下,酸蚀裂缝中流体的滤失规律与泡沫压裂液或泡沫酸的滤失规律相同,随着CO₂体积分数增加,酸液滤失量减少,而酸蚀蚓孔半径也相应变小。
- 酸压 /
- 酸液滤失 /
- 滤失机理 /
- CO₂ 效应 /
- 碳酸盐岩储层
Abstract: CO₂ generates in the course of acidizing treatment with the reaction of acid and rock, which will influence the mechanism of acid leaking. An acid filtration model considering CO₂ effect has been set up based on the conventional acid filtration model in order to study the CO₂ effect on acid liquid loss and to determine the volume of free CO₂. Simulation results showed that the volume of free CO₂ increases with increasing acid concentration and decreases with increasing pressure. In acid corrosion fractures, when free CO₂ exists, filtration law is the same as foam fracturing, and the volume of acid fluid loss reduces with increasing CO₂ volume.
- acid fracturing /
- acid fluid loss /
- leak-off mechanism /
- CO₂ effect /
- carbonate reservoir

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参考文献(10)

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