本文選題：煤層氣 + 滲透率��； 參考：《煤炭學(xué)報》2017年S1期

【摘要】：統(tǒng)計分析了國內(nèi)外不同煤階和地區(qū)的煤儲層滲透率數(shù)據(jù),顯示國外相同煤階煤儲層的滲透率要比我國高1~2個數(shù)量級,且我國不同煤階煤儲層滲透率整體上差異不大。研究表明,煤儲層的滲透性主要受現(xiàn)今地應(yīng)力強度和構(gòu)造史及與其伴隨的流體活動史決定的煤體結(jié)構(gòu)、割理發(fā)育程度和割理充填狀況等因素控制,高應(yīng)力、復(fù)雜煤體結(jié)構(gòu)和割理充填,是中國低滲透煤儲層的基本成因機理�；谖覈簝訚B透率分布特點和不同滲透率條件下單井產(chǎn)量的分析,將有效煤儲層的滲透率下限定為0.01×10~(-15)m2,按滲透率將有效煤儲層劃分為低滲(k=0.01×10~(-15)~0.1×10~(-15)m2)、中滲(k=0.1×10~(-15)~0.5×10~(-15)m2)、中高滲(k=0.5×10~(-15)~1×10~(-15)m2)、高滲(k=1×10~(-15)~5×10~(-15)m2)和超高滲(k5×10~(-15)m2)5個等級,煤層氣井的實際產(chǎn)量除受滲透率影響外,還受到煤層厚度、含氣量、壓裂參數(shù)、地質(zhì)構(gòu)造、煤系地層含水性和排采工作制度等其他因素的影響,隨著我國煤層氣開發(fā)技術(shù)的進步,低滲煤儲層(k=0.01×10~(-15)~0.1×10~(-15)m2)經(jīng)合理配套的壓裂技術(shù)和排采方案仍可獲得理想的產(chǎn)氣量。
[Abstract]:The permeability data of different coal ranks and regions at home and abroad are statistically analyzed. The results show that the permeability of the same rank coal reservoirs abroad is 1 ~ 2 orders of magnitude higher than that of China, and the overall permeability of different coal rank coal reservoirs in China is not different as a whole. The study shows that the permeability of coal reservoir is mainly controlled by such factors as the present stress intensity and tectonic history and the associated fluid activity history, such as the coal body structure, the degree of cleat development and the condition of cleat filling, and so on. Complex coal structure and cleat filling are the basic genetic mechanism of low permeability coal reservoirs in China. Based on the characteristics of permeability distribution of coal reservoirs in China and the analysis of single well production under different permeability conditions, 灝嗘湁鏁堢叅鍌ㄥ眰鐨勬笚閫忕巼涓嬮檺瀹氫負0.01脳10~(-15)m2,鎸夋笚閫忕巼灝嗘湁鏁堢叅鍌ㄥ眰鍒掑垎涓轟綆娓，

本文編號：2052262