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应用层序地层学解释方法对乌尔逊凹陷北部下白垩统地层进行了层序地层分析，将其划分为４个层序和４种层序类型，即简单断陷层序、快速断坳层序、同生断坳层序和简单坳陷层序。不同的层序发育有不同的体系域类型；重点分析了构造活动对这些层序和体系域类型的控制作用。在充分利用钻井、测井、地震资料的基础上建立了该地区层序地层充填模式；指出油气在这些层序和体系域类型中的赋集规律，认为快速断坳层序和同生断坳层序能形成最有利的生储盖组合。
The sequence stratigraphy analysis of the Lower Cretaceous strata in the northern Wuerxun Depression is made by means of sequence stratigraphy interpretation. It is divided into four sequences and four types of sequences, that is, simple faulted sequence, rapid fault-depression Sequence, Tongsheng fault depression sequence and simple depression sequence. There are different types of system domains developed in different sequences; and the controlling role of tectonic activities on these sequence types and system domain types is mainly analyzed. Based on the full utilization of drilling, well logging and seismic data, the pattern of sequence stratigraphy filling in this area was established. The law of accumulation of oil and gas in these sequences and system domains was pointed out. The sequence can form the most favorable reservoir-cap combination.