本文選題：潘集深部煤層 + 瓦斯�。� 參考：《安徽理工大學》2017年碩士論文

【摘要】：本文通過對潘集深部鉆孔煤樣進行現(xiàn)場地勘鉆孔瓦斯解吸實驗和室內(nèi)等溫吸附解吸實驗,基于現(xiàn)場測試數(shù)據(jù),采用地勘直線法、泥漿介質(zhì)法、間接法、不同函數(shù)擬合等分析方法,計算了不同方法下的煤層瓦斯損失量,并對深部瓦斯計算方法進行了對比分析。在對潘集深部煤層煤樣現(xiàn)場解吸時,采用煤儲層溫度條件下煤樣解吸規(guī)律推算出的瓦斯損失量更接近實際量。采用泥漿介質(zhì)法校正計算出的瓦斯含量與國標法計算出的瓦斯含量相比相差不大,而采用間接法推算出的瓦斯含量結(jié)果與國標法推算出的瓦斯含量相比相差較大,計算結(jié)果僅能作為參考。在利用不同函數(shù)擬合計算瓦斯損失量時,直線法受煤芯取樣時間的影響最大,且煤芯地勘解吸法采用初期15min的5個左右數(shù)據(jù)點進行計算,其受裝罐后初次讀數(shù)時間的影響大,而15min后的讀數(shù)對損失量的計算無關(guān),數(shù)據(jù)受現(xiàn)場的解吸條件影響大;采用對數(shù)法及蘭式方程擬合,能更好地反映瓦斯解吸特征。延長現(xiàn)場解析時間,有助于提高兩種方法的計算精度。對數(shù)法在提鉆時間相對較長時,損失量精度高于直線法。但隨著解吸時間的增加,其模擬數(shù)據(jù)與實際解吸數(shù)據(jù)的偏差和直線法一樣,偏差愈來愈大,理論上當解吸時間為無限大時,其計算解吸量無窮大,因此無法預測極限解吸量。而采用蘭式方程擬合,其擬合數(shù)據(jù)與實際解吸的數(shù)據(jù)誤差相對較小,而且利用擬合計算極限解吸量與損失量的差值可以與實驗室的殘余量進行互為驗證。
[Abstract]:In this paper, gas desorption experiments and isothermal adsorption desorption experiments are carried out on the coal samples of deep boreholes in Panji. Based on the field test data, the methods of geological prospecting, mud medium and indirect methods are used. Different function fitting and other analysis methods are used to calculate the amount of coal seam gas loss under different methods, and the deep gas calculation methods are compared and analyzed. In the desorption of coal samples from deep coal seams in Panji, the amount of gas loss calculated by using the desorption law of coal samples under the conditions of coal reservoir temperature is closer to the actual amount. The gas content calculated by mud medium method is similar to that calculated by national standard method, but the gas content calculated by indirect method is quite different from that calculated by national standard method. The calculated results can only be used as a reference. In the calculation of gas loss by using different function fitting, the linear method is most affected by the sampling time of coal core, and the coal core geological prospecting and desorption method is calculated by 5 or so data points of 15min in the initial period, which has a great influence on the first reading time after filling tank. But the reading after 15min has nothing to do with the calculation of the loss, and the data is greatly affected by the desorption condition in the field, and the logarithmic method and the blue equation fitting can better reflect the characteristics of gas desorption. Prolonging the time of field analysis is helpful to improve the accuracy of the two methods. The loss accuracy of logarithmic method is higher than that of straight line method when the lifting time is relatively long. However, with the increase of desorption time, the deviation between the simulated data and the actual desorption data is more and more large as the linear method. Theoretically, when the desorption time is infinite, the calculated desorption capacity is infinite, so the limit desorption can not be predicted. By using the blue equation, the error between the fitting data and the actual desorption data is relatively small, and the difference between the limit desorption amount and the loss amount can be verified by fitting.
【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TD712

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