莱阳凹陷页岩气资源潜力前景分析

摘要

Jiaolai depression is the most representative in Cretaceous strata in Shandong province.Shale gas`bearing strata in Cretaceous is Laiyang group.Laiyang depression has been considered as the favorable are-a for searching oil and shale gas.Lots of work has been done by Shengli Oilfield since 50s and 60s in last century,but hasn`t obtained breakthrough results.There are preferable dark shales(source rocks)in Laiy-ang depression,but most of these shales have been exposed and denuded.Through investigation and study in recent years,it is regarded that there has the condition for forming shale gas in Laiyang depression.On the basis of studying geological characteristics,organic geochemical characteristics and restoring the proto-type basin,the accumulation prospective areas have been circled in Laiyang depression.%山东省白垩世地层以胶莱坳陷最具代表性，白垩系中页岩气赋存地层为莱阳群。一直认为莱阳凹陷是胶莱坳陷寻找石油和页岩气的有利区域，胜利油田从20世纪五六十年代开始做了大量工作，均未取得突破性成果。莱阳凹陷内较好的暗色泥页岩（烃源岩），大部出露或被剥蚀，通过近几年的调查研究认为莱阳凹陷具有页岩气形成的条件，在研究莱阳凹陷的地质特征、有机地化特征、恢复原型盆地等基础上，圈定了页岩气成藏远景区。