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人们对某一断层作封闭性研究时，只是给予“封闭”与“不封闭”的定性判断。通过对油田开发的实际资料解剖，发现由于断层两盘岩性差异性、储层与断裂带充填物之间的物性差异性造成断层不同位置处封闭能力上的差异性，由于断裂充填物性质、分布的差异性造成断层不同位置处封闭类型的差异性，在断层活动或静止的不同阶段，断层的封闭性不同。通过断层封闭的差异性分析，说明定性判断断层封闭性的片面性和风险性，指出全方位半定量—定量研究断层封闭性的必要。
When people make a closed study on a fault, they only give qualitative judgment of “closed” and “non-closed”. By analyzing the actual data of oilfield development, it is found that there are differences in the sealing ability at different positions of the fault due to the difference in lithology of the two reservoirs and the difference in physical properties between the reservoir and the filling of the fault zone. Due to the nature of fault filling, The differences in distribution result in the different types of sealing at different positions of faults, and the sealing of faults is different at different stages of fault activity or standstill. According to the analysis of the difference of fault sealing, the one-sidedness and risk of qualitatively confirming fault sealing is illustrated. It is pointed out that all-around semi-quantitative-quantitative study of fault sealing is needed.