【摘要】：蘇里格氣田屬于典型的低滲透砂巖巖性氣藏,在開發(fā)的過程中,部分氣井出現(xiàn)不同程度的產水現(xiàn)象。然而,目前對氣井產出水的來源及孔隙水的可動條件認識還不夠明確,這嚴重地影響了氣田的開發(fā)效果和開發(fā)進程。本文綜合運用試氣、生產、測井及水化學分析等資料,在對蘇東地區(qū)生產現(xiàn)狀及氣水分布規(guī)律研究的基礎上,綜合判斷出蘇東地區(qū)的產出水主要以盒8段的儲層原生沉積水為主,山1段的儲層原生沉積水為輔。在此基礎上,通過含束縛水狀態(tài)下氣體的滲流規(guī)律和氣水兩相滲流規(guī)律實驗表明:蘇里格東區(qū)氣藏是親水氣藏,其束縛水飽和度越高氣體滲流的非線性滲流特征越明顯,氣體的滲流阻力也越大。進而通過巖心高壓驅替實驗、核磁共振實驗及壓力敏感性實驗對儲層原生沉積水的可動性進行了實驗室研究,研究結果表明:核磁共振T2譜的T2cutoff值直接反應了巖心中束縛水飽和度的大小,小于T2cutoff值為束縛水飽和度,而大于T2cutoff值為可動水飽和度;對同一巖心,驅替壓力越大,孔隙中被驅出的水越多,孔隙水的可動性越強;對不同巖心,巖樣的孔滲越高,孔隙中原生水的可動性越大。由此可見,孔隙中原生沉積水的可動性與巖樣的孔隙度、滲透率及驅替壓力密切相關,利用該實驗結果得到的可動水飽和度能夠有效表征低滲砂巖氣藏儲層的產水特征,并有效地預測氣井的產水規(guī)律。上述研究對蘇東地區(qū)儲層原生沉積水的可動條件作出了客觀的認識和評價,可以為氣田高效建產提供合理的依據(jù)。
[Abstract]:Sulige gas field is a typical low permeability sandstone lithologic gas reservoir. However, the current understanding of the source of gas well water and the movable conditions of pore water is not clear enough, which seriously affects the development effect and development process of gas field. In this paper, based on the study of production status and gas-water distribution law in eastern Jiangsu, the data of gas test, production, logging and hydrochemical analysis are synthetically used. It can be concluded that the primary sedimentary water in the reservoir of member 8 is the main source of the produced water in the east of Jiangsu province, and the primary sedimentary water in the reservoir of the first member of Shan 1 is the secondary one. On this basis, the experiments of gas seepage and gas-water two-phase seepage under the condition of bound water show that the gas reservoir in Sulige East District is a hydrophilic gas reservoir, and the higher the irreducible water saturation is, the more obvious the non-linear percolation characteristics of gas percolation are. Gas seepage resistance is also greater. Furthermore, the mobility of reservoir primary sedimentary water was studied in laboratory by high pressure displacement experiment, nuclear magnetic resonance test and pressure sensitivity experiment. The results show that the T2cutoff value of NMR T2 spectrum directly reflects the irreducible water saturation in the core. The irreducible water saturation is smaller than the T2cutoff value and the moveable water saturation is greater than the T2cutoff value. For the same core, the higher the displacement pressure is, the more water is expelled out of the pore, the stronger the mobility of pore water is, and the higher the pore permeability of different core is, the greater the mobility of raw water in pore is. It can be seen that the mobility of proto-sedimentary water in pores is closely related to the porosity, permeability and displacement pressure of rock samples. The movable water saturation obtained from the experimental results can effectively characterize the water production characteristics of low permeability sandstone gas reservoirs. The water production law of gas well is predicted effectively. The above study makes an objective understanding and evaluation of the movable conditions of the primary sedimentary water in the reservoirs in the east of Jiangsu Province, and can provide a reasonable basis for the efficient production of the gas fields.
【學位授予單位】：西安石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE312

【參考文獻】

相關期刊論文 前10條

1 高雙守;核磁共振測井[J];測井技術;1983年05期

2 付大其;朱華銀;劉義成;胡勇;;低滲氣層巖石孔隙中可動水實驗[J];大慶石油學院學報;2008年05期

3 王慶勇;;利用毛細管壓力計算低滲儲層可動水飽和度[J];斷塊油氣田;2013年01期

4 洪秀娥,戴勝群,郭建宇,宋秋銀,王興榮,張?zhí)煸?程紅偉;應用毛細管壓力曲線研究儲層孔隙結構——以衛(wèi)城油田Es_4儲層為例[J];江漢石油學院學報;2002年01期

5 宋超;宋明會;吳德龍;;t_2弛豫譜在核磁共振錄井解釋中的應用[J];錄井工程;2006年03期

6 樊愛萍;趙娟;楊仁超;韓作振;王言龍;王秀平;;蘇里格氣田東二區(qū)山_1段、盒_8段儲層孔隙結構特征[J];天然氣地球科學;2011年03期

7 孫向陽,劉方槐;沉積盆地中地層水化學特征及其地質意義[J];天然氣勘探與開發(fā);2001年04期

8 呂漸江;唐海;呂棟梁;黃小亮;余貝貝;;利用相滲曲線研究低滲氣藏水鎖效應的新方法[J];天然氣勘探與開發(fā);2008年03期

9 任曉娟,張寧生,張喜鳳,李天太,朱金智,尹達,鄒盛禮;水相滯留對低滲氣層滲透率的損害分析[J];天然氣工業(yè);2004年11期

10 郭平;黃偉崗;姜貽偉;畢建霞;陳召佑;;致密氣藏束縛與可動水研究[J];天然氣工業(yè);2006年10期

相關博士學位論文 前1條

1 葉禮友;川中須家河組低滲砂巖氣藏滲流機理及儲層評價研究[D];中國科學院研究生院（滲流流體力學研究所）;2011年

相關碩士學位論文 前3條

1 黃偉崗;低滲透氣藏可動水實驗研究[D];西南石油學院;2005年

2 姚尚林;蘇里格低滲透氣藏開發(fā)效果的影響因素研究[D];中國科學院研究生院（滲流流體力學研究所）;2006年

3 姬偉;考慮酸巖反應熱的酸壓溫度場模型研究[D];成都理工大學;2010年

，

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