本文關鍵詞： 固體潮 油氣運移 影響　出處：《成都理工大學》2015年碩士論文　論文類型：學位論文

【摘要】：固體潮每天都在重復發(fā)生。許多觀測都已表明,固體潮對地下水運移有一定的影響。油氣也是賦存在巖石孔隙中的流體。固體潮能對地下水的運移有影響,對油氣的運移理應也會產(chǎn)生影響。迄今為止,油氣運移研究基本上都沒有考慮固體潮的影響。本文的主要內(nèi)容就是分析討論固體潮對油氣運移的影響,以及這種影響是否應該納入油氣運移驅動力考慮范疇。不同于海洋、湖泊的潮汐,固體潮現(xiàn)象不易被人察覺。在潮汐力的作用下,地表每天的起伏在35至40cm之間。在行星連珠(如日食、月食)發(fā)生期間,地表的起伏可以超過40cm。在一天之內(nèi),地表的起伏出現(xiàn)兩次峰(谷)值,但這不代表固體潮的周期僅為半天。事實上,固體潮包含多種成分。按照周期來劃分,固體潮的成分可以分為半日潮(周期為12小時左右)、日朝(周期為24小時左右)以及長周期潮(周期在半個月及以上)。固體潮對油氣運移的影響機制可以概括為:潮汐力的作用使地殼發(fā)生周期性的形變,而這種周期性的形變不僅使儲層的微結構發(fā)生了變化,還對儲層中的壓力分布造成了擾動,進而產(chǎn)生了水力學響應。本文通過理論分析得到了固體潮影響油氣運移的微觀機制與宏觀機制。微觀上,筆者通過分析油團穿過喉道的臨界條件并結合固體潮的作用機制證實,固體潮產(chǎn)生的壓力變化可以為喉道中的油團運動提供額外的驅動力,幫助接近臨界狀態(tài)的油團穿過喉道。宏觀上,筆者通過滲流力學方面的分析得出結論:固體潮通過對壓力的擾動使儲層中的滲流場發(fā)生了變化,這種變化在總體上體現(xiàn)為促進作用。為了進一步確定固體潮影響的量級,本文通過一個簡單斷層疏導模型分別計算了固體潮對油氣運移速率及運移量的影響幅度,并分別與總運移速率及運移量進行了對比,獲得了固體潮影響油氣運移的趨勢與量級。
[Abstract]:The solid tide is repeated every day. Many observations have shown that the solid tide has a certain effect on the groundwater migration. Oil and gas is also a fluid in the rock pores. The solid tide energy has an effect on the groundwater migration. So far, the influence of solid tide has not been considered in the study of hydrocarbon migration. The main content of this paper is to analyze and discuss the effect of solid tide on oil and gas migration. And whether this effect should be considered as a driving force for oil and gas migration. Different from the tide in the ocean and lake, the phenomenon of solid tide is not easy to be noticed. The surface fluctuates from 35 cm to 40 cm per day. During eclipses of the sun and the moon, the surface can fluctuate more than 40 cm. Within one day. There are two peaks (valleys) in the surface undulation, but this does not mean that the period of the solid tide is only half a day. In fact, the solid tide contains a variety of components and is divided according to the period. The composition of the solid tide can be divided into semidiurnal tides (the period is about 12 hours). The influence mechanism of solid tide on oil and gas migration can be summarized as follows: the effect of tidal forces on crustal deformation occurs periodically. The periodic deformation not only changes the microstructure of the reservoir, but also disturbs the pressure distribution in the reservoir. In this paper, the microscopic mechanism and macroscopic mechanism of the effect of solid tide on oil and gas migration are obtained by theoretical analysis. By analyzing the critical condition of the oil mass passing through the throat and combining the mechanism of the solid tide, it is proved that the pressure change caused by the solid tide can provide additional driving force for the oil mass movement in the throat. From the macroscopic point of view, through the analysis of percolation mechanics, it is concluded that the seepage field in the reservoir has been changed by the disturbance of the solid tide to the pressure. In order to further determine the magnitude of the effect of the solid tide, this change is reflected in the overall role of promotion. In this paper, a simple fault grooming model is used to calculate the influence of solid tide on oil and gas migration rate and migration rate, respectively, and compared with the total migration rate and migration volume. The trend and order of magnitude of the effect of solid tide on oil and gas migration are obtained.
【學位授予單位】：成都理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.13;P312.4

【共引文獻】

相關期刊論文 前10條

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本文編號：1491933