本文選題：西山區(qū)塊 + 含氣性��； 參考：《煤田地質(zhì)與勘探》2017年01期

【摘要】：煤層含氣性是決定煤層氣勘探開發(fā)的重要參數(shù),煤層氣甲烷碳同位素能有效反映煤層氣的賦存條件。根據(jù)煤層氣井實測含氣量數(shù)據(jù),剖析了山西沁水盆地煤層含氣量分布特征,建立了煤層含氣量與煤層埋深、地質(zhì)構(gòu)造之間的相關(guān)關(guān)系和模型,探討了煤層甲烷碳同位素分布特征及其對含氣性分布的指示作用。研究表明:西山區(qū)塊2號煤層平均含氣量6.87 m~3/t,8號煤層平均含氣量8.4 m~3/t,9號煤層平均含氣量7.6 m3/t,煤層含氣量主要受煤層埋深和構(gòu)造形態(tài)的影響。研究區(qū)8號煤層甲烷碳同位素為 65.33‰~ 40.94‰,平均 45.88‰,煤層含氣量與甲烷碳同位素之間成正相關(guān)關(guān)系,隨著含氣量的增加,甲烷碳同位素也逐漸變重。煤層甲烷碳同位素主要受控于煤層氣解吸 擴(kuò)散 運移效應(yīng)和地下水動力作用等。
[Abstract]:The methane content of coal seam is an important parameter to determine the exploration and development of coalbed methane, and the methane carbon isotope can effectively reflect the condition of coalbed methane occurrence. Based on the measured gas content data of coalbed gas wells, the distribution characteristics of coal seam gas content in Qinshui Basin, Shanxi Province, are analyzed, and the correlation and model between coal seam gas content and coal bed depth and geological structure are established. The characteristics of methane carbon isotope distribution in coal seam and its indicative effect on gas-bearing distribution are discussed. The results show that the average gas content of No. 2 coal seam in Xishan area is 6.87 mm2 / t, that of No. 8 coal seam is 8.4 mm2 / 3 / t, and that of No. 9 coal seam is 7.6 m3 / t, and that the gas content of coal seam is mainly affected by the buried depth of coal seam and structural morphology. The methane carbon isotopes in No. 8 coal seam are 65.33 鈥，

本文編號：1979374