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无机盐对气藏砂岩表面动态润湿性的影响研究 被引量:2
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作者 李继山 姚同玉 《西安石油大学学报(自然科学版)》 CAS 北大核心 2015年第4期79-81,86,共4页
为了研究低矿化度水水驱过程中盐离子及矿化度与岩石润湿性的关系,用接触角测定仪测定了盐水在砂岩表面的接触角随时间的变化,并对变化机理进行了探讨。结果表明:液固之间的接触角随时间的增加而减小,初期减小速度较大,后期较小;水相中... 为了研究低矿化度水水驱过程中盐离子及矿化度与岩石润湿性的关系,用接触角测定仪测定了盐水在砂岩表面的接触角随时间的变化,并对变化机理进行了探讨。结果表明:液固之间的接触角随时间的增加而减小,初期减小速度较大,后期较小;水相中盐离子增加了砂岩表面的疏水性,降低了水在砂岩表面的润湿速率,润湿速率随矿化度的增加先增加后降低;Ca2+、Mg2+对润湿性的影响大于Na+。 展开更多
关键词 低矿化度水驱 砂岩润湿性 无机盐 气藏
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北海混合润湿性砂岩储层NMR测井
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作者 Eides.,T 赵文杰 《测井科技》 1997年第2期42-47,共6页
去年在北海地区用NMR测井仪(NML)测了一些井,并建立了庞大的数据来评价NML解释储层渗透率、孔隙度和流体饱和度及其分布方面的潜力。本文对在北海北部富饶的黑雁油田混合润湿性储层的三口井所测的NML资料进行了评价,并... 去年在北海地区用NMR测井仪(NML)测了一些井,并建立了庞大的数据来评价NML解释储层渗透率、孔隙度和流体饱和度及其分布方面的潜力。本文对在北海北部富饶的黑雁油田混合润湿性储层的三口井所测的NML资料进行了评价,并将之与常规测井资料进行了对比。为了进行刻度,还建立起了综合实验项目,从同一测量井段中挑选了一些岩心进行分析。尽管这些NML资料的信噪比颇低。 展开更多
关键词 NMR测井 储层 混合润湿性砂岩 砂岩 油气藏
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Displacement behavior and mechanism of long-term water flooding in sandstone oil reservoirs 被引量:1
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作者 CAO Ren-yi DAI Zong +4 位作者 WANG Zhi-kai WANG Ya-hui JIANG Jun LI hai-long JIA Zhi-hao 《Journal of Central South University》 SCIE EI CAS CSCD 2021年第3期834-847,共14页
Sandstone oil reservoirs with huge bottom water and high permeability are generally developed with high flow rate.After long-term water flooding(LTWF),the water flooding characteristics are quite different from that o... Sandstone oil reservoirs with huge bottom water and high permeability are generally developed with high flow rate.After long-term water flooding(LTWF),the water flooding characteristics are quite different from that of original reservoir.In this paper,the effects of the PV number,viscosity,and displacement rate during LTWF are studied through experiments.The mechanism is analyzed based on analysis of changes in oil composition,rock mineral composition and wettability.The oil-water relative permeability curves,oil recovery and wettability were obtained with new experiments methods,which avoids the oil metering error by measuring oil and water separately.The research indicates that when the viscosity increases,the water phase permeability decreases,the residual oil saturation increases,and the water content rate increases earlier.A higher water flooding rate results in a higher ultimate recovery.A higher asphaltene content results in a higher viscosity and more oil-wet reservoir conditions.After LTWF,the wettability tends to water-wet,which is more favorable for heavy oil recovery.Moreover,LTWF reduces the clay content,which creates a more water-wet surface and a larger reservoir pore throat environment.This research provides insightful characteristics of offshore sandstone oil reservoirs,which can be used to enhance oil recovery. 展开更多
关键词 long-term water flooding sandstone reservoir relative permeability curve WETTABILITY
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