利用基质酸化提高祖拜尔油层的生产力

IF 1.3 4区 工程技术 Q3 CHEMISTRY, ORGANIC Petroleum Chemistry Pub Date : 2024-10-16 DOI:10.1134/S0965544124050190
Ameer Talib, Ihab Sami Hasan, Harith Falih Al-Khafaji, Qasim Abdulridha Khlati
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引用次数: 0

摘要

由于渗透率降低,近井筒损害会降低石油产量。通过使用预先确定浓度的混合酸,基质酸化可大大提高油井性能。在制备岩心塞(岩心样品清洗)后,薄片岩相检查显示,所有样品都具有石英安山岩等级,其中 95% 为石英矿物,少量粘土矿物和方解石胶结物填充孔隙。使用氦气孔隙度计测量的孔隙度算术平均值约为 24.9%。此外,使用岩芯实验室渗透仪测量的几何平均渗透率为 802 md。根据选择适当酸性物质的技术标准,HF(氢氟酸)和 HCl(盐酸)酸被用来酸化岩心样品,浓度分别为 3% 和 12%。除矿物成分外,岩心堵塞的高渗透性也是确定 HF 和 HCl 酸浓度百分比的原因之一。实验室研究结果明确显示,岩心酸化后石油采收率大幅提高,明显超过未酸化情况下的采收率,尤其是在早期水饱和的情况下。这些发现强调了基质酸化作为一种有效策略的巨大潜力,可减轻砂岩储层的近井筒损害并优化石油生产。
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Improving Productivity of Zubair Formation Using Matrix Acidizing

Near-wellbore damage deteriorate oil production due to a reduction in permeability. Matrix acidizing may significantly enhance well performance by using a predefined mixture of acids concentration. After preparing core plugs (core sample cleaning), the petrographic inspection of thin sections has shown that all samples have quartz arenite rank which consists of 95% quartz mineral and little amount of clay minerals and calcite cement filling pores. The arithmetic average of measured porosity by using helium porosimeter was about 24.9%. Also, the geometric averaging permeability was 802 md measured by using core lab permeameter. Based on the technical criteria for selecting appropriate acids, HF (hydrofluoric acid) and HCl (hydrochloric acid) acids have been chosen to acidize core samples with concentrations of 3 and 12%, respectively. The high permeability of core plugs, besides mineralogical composition, is one of the reasons behind the percentages of acid concentrations of HF and HCl. Laboratory findings unequivocally demonstrate a substantial increase in oil recovery following core acidization, notably surpassing recovery rates achieved without acidization, especially in scenarios involving early water saturation. These findings underscore the significant potential of matrix acidizing as an effective strategy for mitigating near-wellbore damage and optimizing oil production in sandstone reservoirs.

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来源期刊
Petroleum Chemistry
Petroleum Chemistry 工程技术-工程:化工
CiteScore
2.50
自引率
21.40%
发文量
102
审稿时长
6-12 weeks
期刊介绍: Petroleum Chemistry (Neftekhimiya), founded in 1961, offers original papers on and reviews of theoretical and experimental studies concerned with current problems of petroleum chemistry and processing such as chemical composition of crude oils and natural gas liquids; petroleum refining (cracking, hydrocracking, and catalytic reforming); catalysts for petrochemical processes (hydrogenation, isomerization, oxidation, hydroformylation, etc.); activation and catalytic transformation of hydrocarbons and other components of petroleum, natural gas, and other complex organic mixtures; new petrochemicals including lubricants and additives; environmental problems; and information on scientific meetings relevant to these areas. Petroleum Chemistry publishes articles on these topics from members of the scientific community of the former Soviet Union.
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