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OCEANIC METHANE HYDRATE: THE CHARACTER OF THE BLAKE RIDGE HYDRATE STABILITY ZONE, AND THE POTENTIAL FOR METHANE EXTRACTION 总被引:3,自引:0,他引:3
Oceanic methane hydrates are mineral deposits formed from a crystalline "ice" of methane and water in sea-floor sediments (buried to less than about 1 km) in water depths greater than about 500 m; economic hydrate deposits are probably restricted to water depths of between 1.5 km and 4 km. Gas hydrates increase a sediment's strength both by "freezing" the sediment and by filling the pore spaces in a manner similar to water-ice in permafrost. Concentrated hydrate deposits may be underlain by significant volumes of methane gas, and these localities are the most favourable sites for methane gas extraction operations. Seismic reflection records indicate that trapped gas may blow-out naturally, causing large-scale seafloor collapse.
In this paper, we consider both the physical properties and the structural integrity of the hydrate stability zone and the associated free gas deposits, with special reference to the Blake Ridge area, SE US offshore, in order to help establish a suitable framework for the safe, efficient, and economic recovery of methane from oceanic gas hydrates. We also consider the potential effects of the extraction of methane from hydrate (such as induced sea-floor faulting, gas venting, and gas-pocket collapse). We assess the ambient pressure effect on the production of methane by hydrate dissociation, and attempt to predict the likelihood of spontaneous gas flow in a production situation. 相似文献
In this paper, we consider both the physical properties and the structural integrity of the hydrate stability zone and the associated free gas deposits, with special reference to the Blake Ridge area, SE US offshore, in order to help establish a suitable framework for the safe, efficient, and economic recovery of methane from oceanic gas hydrates. We also consider the potential effects of the extraction of methane from hydrate (such as induced sea-floor faulting, gas venting, and gas-pocket collapse). We assess the ambient pressure effect on the production of methane by hydrate dissociation, and attempt to predict the likelihood of spontaneous gas flow in a production situation. 相似文献
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小型乙烯生产装置的往复式甲烷制冷压缩机出口气体中存在黑色粉尘,易进入冷箱造成堵塞,影响甲烷制冷并危及装置生产。在小试基础上,通过粉尘特性的分析和对滤饼层的形成、复合丝网多孔材料的过滤机理,以及油性黑色粉尘的反吹再生工艺等的研究,开发出刚性复合烧结金属丝网微孔材料及其过滤技术,并在抚顺乙烯化工有限公司工业装置上增设了一套以刚性复合烧结的金属丝网多孔材料为过滤介质,可在线反吹再生的过滤系统缓解了冷箱堵塞问题。 相似文献
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天然气水合物作为运输和储存天然气的一种新方法日益得到研究者们的重视,实现工业化的关键技术在于如何快速合成水合物。目前实验室中采用化学法和机械法来加快水合物的合成。化学法主要是在气水系统中加入表面活性荆,机械法就是增加反应系统的扰动,增加气水接触面积,主要有:顶部喷淋法、机械搅拌法和孔板鼓泡法。本文以雾流强化实验系统为平台。研究天然气水合物形成的诱导时间、表面活性剂会水合物生成的影响和喷嘴在实验系统中的作用,提出喷嘴选取的原则:①根据反应釜内部形状来选取喷嘴的雾化角;②为充分利用反应釜内部空间应选取雾化形状为实心的喷嘴;③喷嘴的流量要同柱塞泵的流量相匹配,喷嘴流量可以稍大于泵排量;④要选取雾化效果较好,雾化颗粒较小的喷嘴。 相似文献
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为了准确评价鄂尔多斯盆地上古生界油气资源,将油气系统的概念引入了盆地模拟分析,能确定盆地模拟的基本参数。然后应用BASIMS4.5盆地模拟软件对鄂尔多斯盆地上古生界油气藏进行模拟,从而获得了大量详实可靠的上古生界油气藏数据。在此基础上,进一步分析了鄂尔多斯盆地上古生界生烃量在平面上的分布特点,指出伊陕斜坡北部是鄂尔多斯盆地目前最主要的勘探区域,这与目前鄂尔多斯盆地天然气的勘探形势相一致。 相似文献
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济阳坳陷煤型气源岩特征及资源前景 总被引:12,自引:0,他引:12
根据济阳坳陷深层大量钻井,地震和分析化验资料,研究了石炭二叠系中生界2套煤系的赋存状况及地化特征,探讨了“二次生气”的时期,门限深度和门限成熟度,计算了“二次生气”量的煤型气聚集量,并展望了煤型气勘探前景。 相似文献
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本文分析了巴内托定律存在的局限性,提出了油气田规模分布为双段式模型。综合分析认为,松辽盆地东部杏山—莺山断陷为一个独立的地质单元,因而应用双段式模型计算了杏山—莺山断陷煤型气的资源量。 相似文献