1) stratified coverage
分层盖度
3) concentration caprock
浓度盖层
1.
Determining forming period of restrained seal action of undercompacted concentration caprock by using interval travel time data and its research meaning.;
利用声波时差资料研究欠压实浓度盖层抑制封闭作用形成时期及其研究意义
4) layered coverage
分层覆盖
5) hydrocarbon concentration caprock
烃浓度盖层
1.
Based on the study of geological conditions of hydrocarbon concentration caprock, this paper proposes the two models of shielding effect of overlying hydrocarbon concentration caprock to underlain gas diffusion, completely shielding effect and partly shielding effect, which is used in the study of the gas retention of Changde gas pool in Songliao Basin.
在研究烃浓度盖层形成地质条件的基础上,提出了上覆烃浓度盖层对下伏天然气扩散屏蔽作用的两种模式,即完全屏蔽模式和部分屏蔽模式。
6) cover thickness
覆盖层厚度
1.
The determination of the cover thickness of the submarine tunnel is very important,because it will be very dangerous if the cover thickness is too small,whereas the length,slope gradient and cost will be increased after a larger cover thickness is chosen.
江底隧道的覆盖层厚度十分重要。
2.
In underwater tunnel construction,the cover thickness not only plays the decisive role in its security,but al- so is a leading factor determining the underwater tunnel s cost and length.
在水下隧道施工中,覆盖层厚度不仅对其安全性起着决定性作用,而且还是决定水下隧道造价和长度的主要因素。
3.
In underwater tunnel construction,to confirm the reasonable cover thickness is the key in the technology.
合理的确定水下隧道覆盖层厚度是建设水下隧道关键技术之一。
补充资料:盖层
位于储集层之上,能够封隔储集层,使其中的油气免于逸散的封闭层。盖层的好坏直接影响油气在储集层中的聚集和保存。常见的盖层有泥岩、页岩、蒸发岩(石膏、盐岩)和致密灰岩,其中以蒸发岩为最好。盖层之所以能封盖油层,是因为盖层具有较高的排替压力。排替压力是指某一岩层中润湿相流体(水)被非润湿相流体(油)开始排替时所需的最低压力。盖层多被水润湿,油气要通过其运移,必须首先排替其中的水;如果驱使石油运移的动力未达到进入盖层所需的排替压力值,则石油就被封闭于盖层之下,即所谓的毛细管封闭。此外,在储集层之上,某些地区存在有欠压实泥岩。欠压实泥岩,系指泥岩在压实过程中,由于流体排出受阻或来不及排出,因而流体承受了部分上覆地区的有效压应力,使岩层中的流体具有高于静水压力的异常压力,岩石则承受较低的有效压应力形成欠压实。它可以形成压力封闭使下伏储集层中的油气不能向上逸散。但无论是毛细管封闭还是压力封闭,都很难阻挡天然气的分子扩散。因此,天然气藏的盖层要求高,最好的是蒸发岩类。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条