超临界二氧化碳对页岩力学性质影响的试验研究
首发时间:2016-11-01
摘要:页岩油气藏钻探开发的基础问题即是页岩岩石的力学性质,而使用超临界二氧化碳开发页岩油气藏基础理论研究的重要问题之一即超临界二氧化碳对页岩力学性质的影响研究。进行不同条件下超临界二氧化碳浸泡页岩力学性质变化的实验研究,可以揭示其对高效破岩、井壁稳定和压裂等的影响。研究结果表明:超临界二氧化碳浸泡中页岩会膨胀,浸泡后页岩抗压强度减小;随着浸泡时间增加,页岩抗压强度迅速降低而后趋于平缓;随着浸泡温度增加,页岩抗压强度降幅减小。论文为超临界二氧化碳开采页气的发展提供了基础的数据支撑。
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Experimental study on the influence of supercritical carbon dioxide on the mechanical properties of shale
Abstract:The basic problem of shale oil and gas reservoir drilling development is the mechanical properties of shale rock, and one of the important issues in the development of shale oil and gas reservoirs with supercritical carbon dioxide is the study of the influence of supercritical carbon dioxide on the mechanical properties of the shale.The experimental study on the mechanical properties of supercritical carbon dioxide under different conditions can reveal its influence on the efficiency of rock breaking, borehole stability and fracturing. The experimental results indicated that:shale will be expanded soaking in the supercritical carbon dioxide,and the uniaxial compressive strength of the shale is decreased after soaking;with the increasing of soaking time, the uniaxial compressive strength of shale decreases rapidly and then tends to be gentle;with the increasing of soaking temperature, the decline on the uniaxial compressive strength of shale decreased.This paper provides the basic data support for the development of the supercritical carbon dioxide.
Keywords: Oil-Gas Well Engineering, Supercritical carbon dioxide, soaking, shale, mechanical property
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No.4707869116843814****
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