本文選題：煤層氣 + 潤濕性　； 參考：《西安科技大學(xué)》2015年碩士論文

【摘要】：通過試驗結(jié)合理論分析,對采自寺河煤礦3~#煤煤的物質(zhì)組成和孔隙結(jié)構(gòu)分析,在無機巖潤濕性測定的基礎(chǔ)上對煤的潤濕性進行測定,采用了部分潤濕劑和潤濕反轉(zhuǎn)劑來判定其對煤潤濕性的影響。通過對鏡煤、暗煤潤濕性的測定初步確定了宏觀煤巖組分與煤潤濕性的關(guān)系;對不同含水率煤樣進行CH4的等溫吸附/解吸實驗對含水率不同的煤樣解吸特征、煤層氣解吸率與采收率、熱力學(xué)特征進行分析,并對寺河區(qū)塊三口煤層氣直井的排采曲線分段,設(shè)定煤儲層水力參數(shù),分析產(chǎn)水與產(chǎn)氣之間關(guān)系,以寺河1號井排采數(shù)據(jù)為模板,討論高階煤地區(qū)煤層氣井合理的排采工作制度。結(jié)果表明,寺河區(qū)塊3~#無煙煤儲層,煤巖組分呈高鏡質(zhì)組、低惰質(zhì)組、含少量粘土礦物,孔隙度小,顯微煤巖組分中鏡煤較暗煤孔隙度高,原生結(jié)構(gòu)煤區(qū)鏡煤條帶有利于甲烷的流通,暗煤條帶利于甲烷吸附儲集;寺河3~#煤潤濕性較差,鏡煤比暗煤好;6501、JFC和洗衣粉溶液作為潤濕劑利于煤樣對水分子的吸附,g502溶液作為潤濕反轉(zhuǎn)劑利于疏水;寺河3~#煤水分含量越高對甲烷吸附能力越弱;含水率越低,其理論解吸率和理論采收率越高;寺河煤層氣直井的日產(chǎn)氣量/累計產(chǎn)氣量和日產(chǎn)水量/累計產(chǎn)水量均符合e的負(fù)指數(shù)衰減關(guān)系。模擬計算得出日產(chǎn)水為2.5 m3/d時產(chǎn)氣量遠遠大于日產(chǎn)水為1.8m3/d時產(chǎn)氣量。在煤儲層添加潤濕反轉(zhuǎn)劑有利于脫水,提高煤儲層的疏水性,防止速敏和應(yīng)敏效應(yīng)的同時適當(dāng)加大排水強度有利于煤層氣解吸與產(chǎn)出。
[Abstract]:Through the test combined with theoretical analysis, the material composition and pore structure analysis of 3~# coal coal mining from the Sihe coal mine are analyzed, the wettability of coal is determined on the basis of the measurement of the wettability of inorganic rock. Some wetting agent and wetting reverse agent are used to determine its influence on the wettability of coal. The wettability of dark coal is determined preliminarily through the determination of the mirror coal and the dark coal. The relationship between the macroscopic coal and rock composition and the wettability of coal, and the isothermal adsorption / desorption experiments of CH4 with different water content of coal samples, the desorption characteristics of coal samples with different water content, the thermodynamic characteristics of the desorption rate and recovery of coal bed gas, and the subsection of the production curve of the three CBM wells in the Sihe block, and the hydraulic parameters of the coal reservoir are set up. The relationship between producing water and gas production, taking the data from well 1 in well Sihe as a template, the rational drainage and mining system of coal seam gas well in high rank coal area is discussed. The results show that the 3~# anthracite reservoir in the temple area is high vitrinite, low inert mass, small amount of clay minerals, small pore space and high porosity of dark coal in microscopic coal and rock components. The primary coal zone mirror coal strip is beneficial to the circulation of methane, and the dark coal strip is beneficial to the adsorption of methane. The wettability of the 3~# coal in Sihe is poor, the mirror coal is better than the dark coal; 6501, JFC and detergent solution are used as wetting agents to adsorb the water molecules, and the g502 solution is beneficial to the hydrophobicity as a wetting reverse agent; the higher the water content of the Sihe 3~# coal is to methane The weaker the adsorption capacity, the lower the water content, the higher the theoretical desorption rate and the theoretical recovery rate, and the negative exponential attenuation relationship between the daily and cumulative gas production and the daily water yield of the vertical well in the Sihe coal seam gas well. The gas yield is far greater than that of the e when the daily water is 2.5 m3/d. Adding the wetting reverse agent to the layer is beneficial to dehydration, improve the hydrophobicity of the coal reservoir, prevent the speed sensitivity and the desensitization effect, and increase the drainage strength at the same time, which is beneficial to the desorption and production of coal bed gas.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13

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