發(fā)布時(shí)間：2018-05-25 23:28

  本文選題：甲烷水合物 + 多孔介質(zhì)　； 參考：《天然氣工業(yè)》2017年05期

【摘要】：目前有關(guān)天然氣水合物(以下簡(jiǎn)稱水合物)的研究主要集中在物理化學(xué)性質(zhì)考察和開(kāi)采(分解)方法探索方面。在進(jìn)行后者的研究過(guò)程中,地層滲流過(guò)程的物理模擬至關(guān)重要,但目前借助于石油開(kāi)采研究中廣泛應(yīng)用的填砂管等多孔介質(zhì)對(duì)水合物進(jìn)行動(dòng)態(tài)過(guò)程的研究卻鮮有報(bào)道。為此,利用河砂填砂管在巖心驅(qū)替裝置上進(jìn)行了甲烷水合物生成過(guò)程的物理模擬,考察了地層溫度、甲烷壓力及地層模型性質(zhì)參數(shù)等對(duì)水合物生成過(guò)程的影響。結(jié)果表明:(1)利用冰融水作為地層模型的束縛水可顯著提升甲烷水合物的生成速率;(2)多孔介質(zhì)條件下過(guò)程驅(qū)動(dòng)力(即實(shí)驗(yàn)壓力或溫度偏離水合物相平衡對(duì)應(yīng)值的程度)對(duì)甲烷水合物的生成起著決定性作用;(3)當(dāng)甲烷壓力高于水合物相平衡壓力1.4倍以上,或者實(shí)驗(yàn)溫度低于相平衡溫度3℃以下時(shí),甲烷水合物生成誘導(dǎo)期幾乎不隨溫壓條件的變化而變化;(4)滲透率、含水飽和度、潤(rùn)濕性等參數(shù)對(duì)實(shí)驗(yàn)中甲烷水合物的生成率不構(gòu)成明顯影響。
[Abstract]:At present, the research of natural gas hydrate (hereinafter referred to as hydrate) is mainly focused on the investigation of physical and chemical properties and exploration of exploitation (decomposition) method. The physical simulation of formation percolation process is very important in the research of the latter. However, there are few reports on the dynamic process of hydrate by means of porous media such as sand filling pipe, which is widely used in petroleum exploitation research. In this paper, the formation process of methane hydrate is simulated on the core displacement device with river sand filled sand pipe. The effects of formation temperature, methane pressure and formation model property parameters on the formation process of methane hydrate are investigated. The results show that using ice melt water as the bound water of stratigraphic model can significantly increase the rate of methane hydrate formation in porous media (i.e. the experimental pressure or temperature deviates from the corresponding value of hydrate equilibrium) in porous media. When the methane pressure is more than 1.4 times higher than the gas hydrate phase equilibrium pressure, Or when the experimental temperature is lower than 3 鈩，

本文編號(hào)：1935060