断裂带封闭油气所需泥质含量物理模拟

在分析断层静止期垂向封闭机理及其影响因素的基础上,利用自行设计组装的实验装置,模拟了断层静止期不同粒度断裂带封闭油气所需要的粘土含量的下限值。模拟结果表明,断裂带岩石颗粒粒度越粗,封闭油气所需要的粘土含量越低;反之则越高。将模拟实验结果作为断层静止期垂向封闭油气性的评价标准,应用于乌尔逊凹陷北部几条主要断层垂向封闭油气性的评价中,结果适应性良好,表明其作为断层垂向封闭油气性的评价标准是可行的。

Physical Simulation of Shale Content Requirement in Fault Zone Sealing Oil and Gas

Based on the analysis of the vertical sealing mechanism of static fault and its affecting factors,simulation of the cutoff value of shale content required in hydrocarbon sealing by static fault zone with different grain sizes is made.The result shows that the coarser the grain size in fault zone is,the lower the shale content requirement for oil-gas sealing is,and on the contrary,the higher the shale content requirement is.Using this result,as evaluating standard,to vertical oil-gas sealing evaluation of several major faults in northern Wuerson sag,good suitability is gained.It is indicated that such a standard for evaluation of vertical oil-gas sealing in fault is feasible to use.