本文選題：層狀鹽巖 + 水溶溶腔��； 參考：《工程科學(xué)與技術(shù)》2017年06期

【摘要】：為解決層狀鹽巖單井水溶造腔過程中建槽周期長,提管工藝復(fù)雜等問題,開展層狀鹽巖小井間距雙井水溶造腔技術(shù)研究。擬采用選定物理法建立相似試驗(yàn)平臺,探討小井間距雙井水溶造腔流場及濃度場特征,揭示雙井水溶溶腔腔體擴(kuò)展與流場的聯(lián)系。結(jié)果表明:雙井水溶造腔過程中腔體流場可以劃分為4個(gè)區(qū)域:邊界溶蝕區(qū)、浮羽流區(qū)、對流擴(kuò)散區(qū)和底部飽和區(qū),各個(gè)區(qū)域相互影響。浮羽流區(qū)是驅(qū)動流體運(yùn)移的關(guān)鍵區(qū)域,根據(jù)浮羽流區(qū)流場特征建立相應(yīng)的流場模型;根據(jù)宏觀流動特征,對流擴(kuò)散區(qū)分為強(qiáng)擴(kuò)散區(qū)和弱擴(kuò)散區(qū);邊界溶蝕區(qū)對雙井水溶溶腔腔體擴(kuò)展有顯著影響;飽和區(qū)示蹤特征不明顯但濃度分層明顯。通過對比分析雙井造腔和單井造腔模型試驗(yàn)結(jié)果,發(fā)現(xiàn)雙井水溶造腔工藝有利于鹽穴建槽期,研究為小井間距雙井水溶造腔技術(shù)的應(yīng)用提供一定的理論基礎(chǔ),對鹽穴儲氣庫的優(yōu)化建造具有重要意義。
[Abstract]:In order to solve the problems of long period of channel construction and complicated pipe lifting technology in the process of single well formation of layered salt rock by water solution, the technique of water dissolution cavity formation in two wells with small well spacing in layered salt rock is studied. A similar test platform is established by using the selected physical method to study the characteristics of the flow field and concentration field of the water solution cavity in the small well spacing two wells, and to reveal the relationship between the expansion of the water solution cavity and the flow field in the double well. The results show that the cavity flow field can be divided into four regions: boundary erosion zone, floating plume zone, convection diffusion zone and bottom saturated area. The floating plume region is the key region to drive the fluid migration. According to the characteristics of the floating plume flow field, the corresponding flow field model is established, and according to the macroscopic flow characteristics, the convection diffusion can be divided into the strong diffusion zone and the weak diffusion zone. The boundary corrosion zone has a significant effect on the expansion of water solution cavity in double wells, and the tracer characteristics of saturation zone are not obvious but the concentration stratification is obvious. By comparing and analyzing the model test results of double-well cavities and single-well cavities, it is found that the double-well water-soluble cavities process is beneficial to the period of salt cavern construction. The research provides a theoretical basis for the application of water-soluble cavities technology in small well spacing and double-well wells. It is of great significance to optimize the construction of salt cavern gas storage.
【作者單位】： 重慶大學(xué)煤礦災(zāi)害動力學(xué)與控制國家重點(diǎn)實(shí)驗(yàn)室;中國科學(xué)院武漢巖土力學(xué)研究所巖土力學(xué)與工程國家重點(diǎn)實(shí)驗(yàn)室;重慶市市政設(shè)計(jì)研究院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51574048;41672292;51604044) 中央高�；鹳Y助項(xiàng)目(106112016CDJZR245518)
【分類號】：TU45

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本文編號：2053026