【摘要】 在深入研究断层垂向封闭性机理及影响因素的基础上,利用达西定律,在假设外力作用下通过断层在目的层段油气渗滤速度的计算,建立了断层垂向封闭性综合评价指标vD.将其应用于松辽盆地北部汪家屯气田W1、W5断层和南山湾-大赉地区①至⑦号断层在青山口组的垂向封闭性评价,得到汪家屯气田W1、W5断层vD分别为7.0%和8.6%,表明其均具较好的垂向封闭能力。南山湾-大赉地区①至⑤号断层垂向封闭性好,⑥和⑦号断层垂向封闭性中等。该方法可以综合定量评价断层垂向封闭性,是一种有效的断层垂向封闭性的评价方法。更多还原

【Abstract】 Based on the in-depth study of vertical sealing mechanism of fault and its influencing factors and using Darcy’s law,this paper established a comprehensive evaluation index v D by calculating percolation velocity of oil and gas at target zones through fault under the given action of external stress,and applied it in evaluation of vertical sealing properties of W1and W5faults in Wangjiatun gas field of northern Songliao basin as well as No.1to No.7faults(Qingshankou formation)in Nanshanwan-Dalai area,obtaining v D of W1and W5is7.0%and8.6%,respectively,showing good vertical sealing capacity;No.1to No.5faults in Nanshanwan-Dalai area are of good vertical sealing property;while No.6and No.7faults are of medium one.It is indi -cated that this method can be used for quantitative evaluation of vertical sealing feature of faults as an effective evaluating tool.更多还原