胶莱盆地莱阳凹陷为一典型的中生代残留凹陷。长期以来，由于对该凹陷烃源岩生 烃史认识不清, 给勘探潜力评价带来不利影响。应用生烃动力学方法，对该凹陷莱孔2井2块 典型烃源岩生烃动力学参数及烃源岩生烃史进行了研究，结果表明: 莱阳凹陷在地史时 期存在2个生油峰期，第1期出现在90~75 Ma，主要烃源岩是位于莱阳凹陷中心的逍仙庄段 烃源岩，生油范围较小；第2期出现在75~65 Ma，生油范围广，包括凹陷内的水南段烃源岩 及斜坡带的逍仙庄段烃源岩，为主生油期。认为莱阳凹陷圈闭构造主要形成期与烃源岩主生 烃期基本吻合，但由于后期构造破坏，莱阳凹陷的勘探重点应放在有较好储盖组合、未受明 显构造变动的残存凹陷。

The Laiyang Depression of the Jiaolai Basin is a typical Mesozoic residual dep ression.There has been little research on the petroleum\|generating history of t he source rocks from this depression for a long period,which has a significant  effect on the evaluation of its petroleum exploration potential.In this paper, the petroleum-generating kinetics parameters of two typical source rock samples   from the Well of LK2 and the petroleum-generating history of the source rocks f rom this depression were investigated based on the kinetics method.The results h ave shown that two oil-generating peak periods of the source rocks occurred in  this depression during geological history.The first peak occurred during 90-75 Ma,and the oil was mainly derived from the Xiaoxianzhuang Section source rocks d istributed only in the depression center area.The second peak occurred during 7 5-65Ma with large scale,and petroleum was from the source rocks of the Shuinan  Section in the whole depression and Xiaoxianzhuang Section from the slope area. The forming period of trapped structures was largely corresponding to that of pe troleum generation.However,owing to the structure destruction during the late  tectonic movements,the exploration targets should be the depression inside area  where the reservoir -cap rock association developed well and the whole structu res has preserved.This result will provide an important guide to the petroleum e xploration of the Laiyang Depression.
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