| 裂缝性油藏酸液滤失模型研究 |
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| 引用本文： | 李勇明,郭建春,赵金洲,刘学利.裂缝性油藏酸液滤失模型研究[J].西南石油学院学报,2004,26(2):50-53. |
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| 作者姓名： | 李勇明 郭建春 赵金洲 刘学利 |
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| 作者单位： | [1]西南石油学院天然气开采重点实验室，四川成都610500 [2]西北石油局 |
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| 摘 要： | 酸液在酸压裂缝内流动时,有少数较大的岩石孔隙或天然裂缝首先受到过量酸液的溶蚀而迅速增长形成蚓孔,使滤失主要在蚓孔内发生.因此研究天然裂缝性油藏酸液滤失,必须考虑酸蚀蚓孔的影响.基于裂缝性油藏酸压中酸液的流动反应特性,建立了酸蚀蚓孔的增长模型、酸液在蚓孔内流动反应模型和滤失的酸液在地层中流动模型,提出了便于现场应用的裂缝性油藏酸压滤失计算方法;就影响蚓孔增长及滤失的裂缝净压力、蚓孔密度和酸液粘度等因素进行了实例计算分析,对于现场酸压施工中有效控制酸液的滤失具有重要的意义.
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| 关 键 词： | 天然裂缝 裂缝性油藏 酸压 蚓孔 滤失 数学模型 |
| 文章编号： | 1000-2634(2004)02-0050-03 |
| 修稿时间： | 2003年5月22日 |
Study on Acid Leak-off in Naturally-Fractured Reservoirs |
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| LI Yong-ming.Study on Acid Leak-off in Naturally-Fractured Reservoirs[J].Journal of Southwest Petroleum Institute,2004,26(2):50-53. |
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| Authors: | LI Yong-ming |
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| Abstract: | When acid fluids flow in artificial fractures, some larger pores or natural fractures are dissolved by acid to enlarge into wormholes so that acid mainly leaks through wormholes. Therefore, it must be considered the effects of acidizing wormholes on acid leak-off in naturally-fractured reservoirs. Based on the characteristics of acid flowing in naturally-fractured reservoirs, the model of acidizing wormhole growth, the model of acid flowing and reaction in wormholes and the model of acid flowing in the matrix are developed. The computing method of acid leak-off with the effects of acidizing wormholes is put forward. The effects of net fracture pressure, wormhole population and acid viscosity to wormhole growth and acid leak-off are studied by case calculation that has important meanings for controlling the leak-off of acid fracturing |
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| Keywords: | natural fracture naturally-fractured reservoirs acid fracturing wormhole leak-off mathematical model |
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