Some relationship rules are presented including relationship between gas outburst pressure and maximum velocity of outburst jet,relationship between gas outburst pressure and flow field distribution of gas jet,and relationship between diameter of outburst hole and influence circle of gas jet.
将煤与瓦斯突出过程的瓦斯突出视为连续射流,应用伯努利方程,建立了瓦斯射流的数学模型,得到了瓦斯突出射流流速和流量表达式,在此基础上考虑突出口压力和突出口直径影响,进行了瓦斯射流的数值模拟,得到了突出压力与突出射流最大速度、突出压力与射流流场分布、突出口直径与突出影响范围间关系规律。
Determination of the plugging position of water shutoff agent by breakthrough pressure method.;
用突破压力法确定堵剂在油藏中的封堵位置
Exploration practices in the Jiyang Depression of the Bohai Bay Basin have indicated that,under the same dynamic condition of oil and gas pool forming,resistivity(breakthrough pressure) of entrance and exit interface is different,so fluid enters reservoir and pore respectively.
渤海湾盆地济阳坳陷的勘探实践表明,同一成藏动力条件下,油气充注成藏过程中油气等流体突破储层进/出口界面的抵抗力(突破压力)存在差异,导致选择性地进入储集体和孔隙。
8% after the water of 50 PV is injected;The breakthrough pressure gradient is not lower t.
8%,突破压力梯度一般不低于3。