页岩气超临界吸附研究进展

发布时间：2018-01-17 13:35

本文关键词：页岩气超临界吸附研究进展　出处：《科技导报》2017年15期 　论文类型：期刊论文

【摘要】：超临界吸附是指在临界温度以上时气体在固体表面上发生的吸附,在地层温度条件下,甲烷在页岩中的吸附为超临界吸附。吸附气是页岩气的重要组成部分,研究页岩气的超临界吸附对于页岩气储量评价和开发方案编制等具有重要意义。本文综述了国内外在页岩气超临界吸附研究方面的进展,从页岩等温吸附实验方法、超临界吸附特征及模型建立3方面进行分析。结果表明:1)页岩的甲烷吸附量与煤相比小很多,为满足页岩吸附量测试的要求,对于容量法吸附仪,应配置更高精度的压力传感器;对于重量法吸附仪,应配置更高精度的磁悬浮天平;2)等温吸附实验测试的吸附量为过剩吸附量,过剩吸附量在达到一定压力后会下降,在评价页岩的吸附能力时,不能将过剩吸附量和绝对吸附量混淆,这样将严重低估地层条件下页岩的吸附能力;3)页岩气的吸附面临着理论与实践相矛盾和脱节的问题,页岩气超临界吸附的研究应从理论和实验两方面入手,深化对页岩气超临界吸附特征的认识,建立具有普遍适用性的页岩气超临界吸附理论。
[Abstract]:Supercritical adsorption refers to the adsorption of gas on solid surface when the critical temperature is above the critical temperature. Under the condition of formation temperature, methane adsorption in shale is supercritical adsorption. Adsorption gas is an important part of shale gas. The study of supercritical adsorption of shale gas is of great significance for the evaluation of shale gas reserves and the preparation of development plans. This paper reviews the progress in the research of supercritical adsorption of shale gas at home and abroad. The results show that the methane adsorption capacity of the shale is much smaller than that of coal in order to meet the requirements of shale adsorption capacity testing. For the volumetric adsorption instrument, a higher precision pressure sensor should be installed. For gravimetric adsorption instrument, a higher precision maglev balance should be provided. 2) the adsorption capacity measured by isothermal adsorption experiment is excess adsorption capacity, and excess adsorption capacity will decrease after reaching a certain pressure. In evaluating the adsorption capacity of shale, the excess adsorption capacity and absolute adsorption capacity should not be confused. This will seriously underestimate the adsorption capacity of shale under stratigraphic conditions; 3) the adsorption of shale gas is confronted with the contradiction between theory and practice and the problem of disjoint. The study of supercritical adsorption of shale gas should start from the theoretical and experimental aspects, and deepen the understanding of the characteristics of supercritical adsorption of shale gas. A universal supercritical adsorption theory for shale gas was established.
【作者单位】：中国石油勘探开发研究院廊坊分院;中国石油非常规油气重点实验室;
【基金】：国家重点基础研究发展计划(973计划)项目(2013CB2281)
【分类号】：P618.13
【正文快照】： 近年来,随着非常规油气勘探开发的深入,人们发现页岩具备储集丰富的油气资源而突破了将其作为盖层和烃源岩的传统认识[1-3]。美国和加拿大成功实现了页岩气的商业化开采,使得全球页岩气的研究与勘探开发进入了高潮,掀起了一场页岩气革命[1-6]。与北美相比,中国页岩气勘探开发

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