断层生长指数不仅与断层活动速率有关 ,而且还与沉积速率有关 ,在有严重剥蚀的情况下该指数被严重歪曲。断层活动速率在数值上等于某时期内断层落差与相应时间的比值。同时利用断层生长指数与断层活动速率两种研究手段 ,对惠民凹陷临南地区的断层活动强度进行研究 ,将结果与各地层单元的沉积速率进行比较 ,发现各地层单元的生长指数不可比 ,而断层活动速率的研究结果揭示了断层活动的幕式性 ,与火山岩分布、构造沉降曲线的变化相吻合。总体来说 ,沙三段、东营组沉积期为临南洼陷断裂强烈活动期 ,东营组沉积期断层活动强度大于沙一段沉积期。钱官屯、曲堤地区的二级断层在东营组沉积末期的活动强度大、封闭性差 ,结合原油产层的分布 ,推测两地区油气成藏在馆陶组沉积以后。明化镇组沉积期局部断层的活动强度加大 ,油气有较明显的纵向运移。断层生长指数在实践中的应用有待商榷。图 1表 1参 3(王孝陵摘 ) The fault growth index is not only related to the fault activity rate, but also to the deposition rate, which is severely distorted in the case of severe erosion. The fault activity rate is numerically equal to the ratio of the fault drop to the corresponding time within a certain period of time. At the same time, using the research methods of fault growth index and fault activity rate, we studied the fault activity intensity in Linnan area of ​​Huimin Depression and compared the result with the deposition rate of each unit, and found that the growth index of each unit is not comparable, The results of the fault activity rate reveal the curtain behavior of fault activity, which is consistent with the change of volcanic distribution and tectonic subsidence curve. Generally speaking, the sedimentary period of Shasan and Dongying formations is a strong active period of fault in Linnan sub-sag, and the activity intensity of sedimentary period of Dongying formation is larger than the sedimentary period of Sha-1 formation. The second-level faults in Qianguantun and Qudi area have high activity intensity and poor sealing property at the sedimentary stage of Dongying Formation. Combined with the distribution of crude oil layers, it is speculated that the hydrocarbon accumulation in the two areas was after the deposition of the Guantao Formation. The activity intensity of local faults in Minghuazhen Formation increased during the depositional period, and there was obvious longitudinal migration of oil and gas. The application of fault growth index in practice needs to be discussed. Figure 1 Table 1 Reference 3 (Wang Xiaoling Abstract)