本文選題：鈾 + 地浸��； 參考：《南華大學》2015年碩士論文

【摘要】：我國砂巖鈾礦床類型復雜,礦層非均質(zhì)性嚴重,孔道分布不均勻。特別是地浸采鈾的中后期,大量的注入液沿高滲透礦層突進,致使注入溶浸劑的流動很不均勻,且其不均勻性隨注液時間的推移而加劇,導致溶浸劑濃度變低,與礦層接觸時間變短,對低滲礦帶的浸出率降低,從而整體效率低下。為提高溶浸劑的溶浸范圍,改善溶浸效果,消除或減少地下水復原中的不利,對礦層的滲透性及浸出范圍進行調(diào)整,所采取的一系列工藝技術(shù)措施稱為流體控制。通過注液井向礦層中注入流體控制劑,其在地層條件下成膠后形成堵塞物,降低高滲透模擬礦層的滲透性,迫使溶浸劑轉(zhuǎn)向進入低滲透層,提高其對低滲透礦層的浸出效果。本課題選用價格較低、使用廣泛的低濃度部分水解聚丙烯酰胺和鋁系交聯(lián)劑為材料來合成流體控制劑,較系統(tǒng)全面地對流體控制劑的配方、交聯(lián)劑的選擇及成膠的影響因素進行了研究。通過對流體控制劑的研究,優(yōu)選出了最佳配方：部分水解聚丙烯酰胺(濃度1～1.5g/L)/檸檬酸鋁交聯(lián)劑(0.3～1%)。隨后進行了流體控制劑的影響因素實驗,分析了聚合物相對分子質(zhì)量及濃度、交聯(lián)劑配比及濃度、礦化度等對凝膠體系成膠性能的影響。還進行了流體控制劑在多孔介質(zhì)中的流動性實驗等。影響因素實驗說明,聚合物黏度隨聚丙烯酰胺濃度增加而升高；交聯(lián)體系黏度隨交聯(lián)劑濃度增加而升高；溫度越高聚丙烯酰胺溶液和交聯(lián)體系的黏度越低等。流動性實驗說明,流體控制劑優(yōu)先進入滲透性高的大孔道模擬礦層,而進入低滲層的相對較少；通過對比加入流體控制劑前后水的單位滲流量得出流體控制劑有改變模擬礦層滲透率和使流體轉(zhuǎn)向低滲層的作用,從而達到提高浸出率的目的。
[Abstract]:Sandstone-uranium deposits in China are of complex types, serious heterogeneity and uneven distribution of pores. Especially in the middle and late stage of in-situ leaching of uranium, a large number of injected fluids protrude along the high permeable ore bed, which results in a very uneven flow of the injected solubilizer, and its inhomogeneity is aggravated with the time of injection, resulting in the concentration of the solubilizing agent becoming lower. The contact time with the ore bed becomes shorter and the leaching rate of the low permeability ore belt decreases, thus the overall efficiency is low. In order to improve the leaching range of leaching agent, improve the leaching effect, eliminate or reduce the disadvantage of groundwater restoration, and adjust the permeability and leaching range of ore bed, a series of technical measures are called fluid control. Through the injection of fluid control agent into the ore bed, the fluid control agent is formed after gelatinization under the formation conditions, which reduces the permeability of the high permeability simulated ore bed, forces the leaching agent to turn to the low permeability layer, and improves the leaching effect of the low permeability ore bed. In this paper, the low price, low concentration partially hydrolyzed polyacrylamide and aluminum crosslinking agent were used as the materials to synthesize the fluid control agent, and the formulation of the fluid control agent was systematically and comprehensively. The selection of crosslinking agent and the influencing factors of gelation were studied. Through the study of the fluid control agent, the optimum formula was selected as follows: partially hydrolyzed polyacrylamide (the concentration of 1~1.5g/L)/ aluminum citrate crosslinking agent was 0.3%). The effects of relative molecular weight and concentration of polymer, ratio and concentration of crosslinking agent and salinity on the gelation properties of the gel system were analyzed. The fluidity experiments of fluid control agents in porous media were also carried out. The experimental results show that the viscosity of the polymer increases with the increase of the concentration of polyacrylamide, the viscosity of the crosslinking system increases with the increase of the concentration of crosslinking agent, and the higher the temperature, the lower the viscosity of the solution and crosslinking system. The fluidity experiment shows that the fluid-controlling agent preferentially enters the high-permeability large channel simulated ore bed, while the relatively less fluid control agent enters the low-permeability layer. By comparing the unit seepage flow rate of water before and after the addition of fluid control agent, it is concluded that the fluid control agent can change the permeability of simulated ore bed and make the fluid turn to low permeability layer, thus achieving the purpose of increasing leaching rate.
【學位授予單位】：南華大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD868

【共引文獻】

相關(guān)期刊論文 前9條

1 孟慶林;;先驅(qū)后調(diào)式復合調(diào)驅(qū)技術(shù)的應用[J];化工管理;2014年26期

2 靳麗麗;馬寶利;張志華;趙野;王新苗;;醋酸鉻交聯(lián)劑的合成評價及其成膠機理研究[J];精細石油化工;2014年02期

3 李道山;于娣;汪娟娟;彭文;張景春;陳美華;;大港油田復雜斷塊高溫高鹽油藏深部調(diào)剖研究[J];石油地質(zhì)與工程;2014年01期

4 劉玉莉;歐陽云麗;孔嫦娥;劉莎麗;;一種低成本HPAM-酚醛凝膠體系深部調(diào)剖堵劑的合成[J];應用化工;2014年05期

5 陳大鈞;趙瑩;于小榮;雷鑫宇;;新型弱凝膠的交聯(lián)及其性能研究[J];應用化工;2014年07期

6 劉義剛;徐文江;姜維東;;海上油田調(diào)驅(qū)技術(shù)研究與實踐[J];石油科技論壇;2014年03期

7 謝坤;盧祥國;曹豹;曹偉佳;郭琦;張寶巖;;溶劑水pH對Cr~(3+)聚合物凝膠分子內(nèi)交聯(lián)成膠效果影響[J];石油化工高等學校學報;2015年04期

8 黃德勝;齊寧;姜慧;曲占慶;田雨;;高溫油藏深部復合調(diào)剖技術(shù)研究[J];西安石油大學學報(自然科學版);2014年03期

9 周亞洲;殷代印;張承麗;;大慶油區(qū)三元復合驅(qū)耐堿性調(diào)剖劑的研制與段塞組合優(yōu)化[J];油氣地質(zhì)與采收率;2014年05期

相關(guān)博士學位論文 前1條

1 吳瑞坤;北布扎奇油田弱凝膠調(diào)驅(qū)技術(shù)研究[D];中國石油大學（華東）;2011年

相關(guān)碩士學位論文 前8條

1 郭凱;Gbeibe裂縫性油藏注CO_2混相驅(qū)防氣竄技術(shù)研究[D];西南石油大學;2013年

2 羅凱;微生物弱凝膠復合調(diào)驅(qū)技術(shù)在中高溫油藏的研究與應用[D];蘭州理工大學;2013年

3 胡敬;安塞油田王窯老區(qū)注水井深部調(diào)剖技術(shù)研究[D];西安石油大學;2013年

4 張錕;江蘇油田高7斷塊調(diào)驅(qū)機理數(shù)模仿真[D];長江大學;2014年

5 夏樹斌;深度原位交聯(lián)劑鉻溶膠制備與注入工藝[D];東北石油大學;2014年

6 袁赫;杏六區(qū)東部特高含水期剩余油分布規(guī)律及挖潛措施優(yōu)化研究[D];東北石油大學;2014年

7 趙陽;深部調(diào)驅(qū)體系與油藏匹配性及動態(tài)特征物理模擬研究[D];東北石油大學;2014年

8 原紹寧;江蘇油田真35塊弱凝膠調(diào)驅(qū)技術(shù)研究[D];東北石油大學;2014年

，

本文編號：1893335