To raise coal recovery ratio and solve the key problem of full-dimension mining, a new “3-section” technology of full-dimension mining is put forward in flat thick-seam according to the theory and mining practice. T...To raise coal recovery ratio and solve the key problem of full-dimension mining, a new “3-section” technology of full-dimension mining is put forward in flat thick-seam according to the theory and mining practice. This technology is proved to be rational and feasible in rodway layout system of stagger arrangement.展开更多
长期以来,在煤层气水力压裂研究中多偏重于压裂工艺的研究,而系统考虑地质因素的影响力度不够,从而导致压裂施工效果不明显。基于目标区的钻井、测井和岩心分析测试等资料,分析了主煤层煤岩孔裂隙发育特征、渗透率等特征,柿庄南区块及...长期以来,在煤层气水力压裂研究中多偏重于压裂工艺的研究,而系统考虑地质因素的影响力度不够,从而导致压裂施工效果不明显。基于目标区的钻井、测井和岩心分析测试等资料,分析了主煤层煤岩孔裂隙发育特征、渗透率等特征,柿庄南区块及邻区煤层渗透率平面上变化较大,一般0.01-0.3 m D,平均0.09 m D以上。基于煤岩渗透率和煤岩敏感性测试,确定了煤层渗透率敏感性的主要地质因素——随着地应力梯度的增加呈指数降低,煤储层渗透性受地应力影响明显,随着弹性模量的增大,岩石的可压缩性降低,渗透率受到的影响也越小。展开更多
基金The National Important Technique Innovation Item ( No.[2 0 0 1] 44 1)
文摘To raise coal recovery ratio and solve the key problem of full-dimension mining, a new “3-section” technology of full-dimension mining is put forward in flat thick-seam according to the theory and mining practice. This technology is proved to be rational and feasible in rodway layout system of stagger arrangement.
文摘长期以来,在煤层气水力压裂研究中多偏重于压裂工艺的研究,而系统考虑地质因素的影响力度不够,从而导致压裂施工效果不明显。基于目标区的钻井、测井和岩心分析测试等资料,分析了主煤层煤岩孔裂隙发育特征、渗透率等特征,柿庄南区块及邻区煤层渗透率平面上变化较大,一般0.01-0.3 m D,平均0.09 m D以上。基于煤岩渗透率和煤岩敏感性测试,确定了煤层渗透率敏感性的主要地质因素——随着地应力梯度的增加呈指数降低,煤储层渗透性受地应力影响明显,随着弹性模量的增大,岩石的可压缩性降低,渗透率受到的影响也越小。