本文選題：煤層氣 + 吸附氣　； 參考：《中國礦業(yè)大學》2015年碩士論文

【摘要】：基于新疆阜康礦區(qū)低煤化煙煤儲層滲透性好,游離氣含量高,與國外低煤級盆地條件類似的特殊性,具備經(jīng)濟、高效開采的可能性,本文圍繞煤儲層吸附氣、游離氣含氣量預測這一關鍵科學問題,對新疆阜康礦區(qū)典型井田低煤化煙煤儲層開展了相應研究。結果表明阜康低煤化煙煤在低壓區(qū)間(0-5MPa)對CH4吸附量隨壓力增大趨于線性增加;在中壓區(qū)間(5-17MPa)吸附量隨壓力增大趨于平緩增加;在高壓區(qū)間(17-28MPa)吸附量幾乎不再增加,處于平衡狀態(tài)。煤巖體覆壓條件下的孔、滲力學實驗結果表明研究區(qū)煤樣孔隙體積、孔隙度均隨上覆壓力的升高而減小,服從負指數(shù)函數(shù)關系;過渡孔和微孔平均占總孔容比例的70%左右,占總比表面積的98%以上,大孔平均占總孔容比例的20%左右,實測孔隙度介于4.27%-6.82%之間,孔隙連通性相對較好;煤巖靜態(tài)彈性模量隨軸向應力的增加而逐漸增大,泊松比隨圍壓的增加而逐漸減小。研究了煤儲層的水化學及測井數(shù)據(jù),提出了不同煤儲層含氣飽和度的計算方法;運用數(shù)值模擬方法構建了儲層條件下吸附氣、游離氣含量預測模型;以阜康礦區(qū)氣煤一號井和大黃山煤礦為例,預測了煤層埋深2000m以淺的吸附氣、游離氣含量,結果表明空氣干燥基條件下吸附氣含量介于7.04-14.27m3/t之間,游離氣含量介于0.04-0.66m3/t之間,總含氣量介于7.18-14.49 m3/t之間;與現(xiàn)場解吸實測含氣量吻合程度較高。
[Abstract]:Based on the good permeability and high free gas content of low coal bituminous coal reservoir in Fukang mining area, Xinjiang, which is similar to the conditions of low coal grade basins in foreign countries, and has the possibility of economic and efficient exploitation, this paper focuses on the adsorption of gas in coal reservoirs. The key scientific problem of prediction of free gas content is to study the low coal bituminous coal reservoir in typical coal mine of Fukang mining area in Xinjiang. The results show that the adsorption capacity of CH4 for Fukang low coal bituminous coal tends to increase linearly with the increase of pressure in the low pressure range (0 ~ 5MPa), the adsorption capacity increases slightly with the increase of pressure in the middle pressure region, and the adsorption capacity of CH4 is almost no longer increased in the high pressure region. In equilibrium. The experimental results of pore and permeability mechanics show that the pore volume and porosity of coal samples decrease with the increase of overburden pressure, and follow the negative exponential function, and the average proportion of transition pore and micropore is about 70% of the total pore volume. Over 98% of the total surface area and 20% of the total pore volume account for macropores, the measured porosity is between 4.27% and 6.82%, the porosity connectivity is relatively good, and the static elastic modulus of coal and rock increases gradually with the increase of axial stress. Poisson's ratio decreases with the increase of confining pressure. The hydrochemistry and logging data of coal reservoir are studied, the calculation method of gas saturation in different coal reservoir is put forward, the prediction model of adsorption gas and free gas content under reservoir condition is constructed by numerical simulation method. Taking the No. 1 gas coal mine and Dahuangshan coal mine in Fukang mining area as examples, the adsorption gas and free gas content in 2000m deep coal seam are predicted. The results show that the adsorption gas content is between 7.04-14.27m3/t and free gas content is between 0.04-0.66m3/t under the condition of air drying. The total gas content is between 7.18-14.49 m3 / t, which is in good agreement with the field desorption.
【學位授予單位】：中國礦業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.13

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