长岭凹陷青山口组沉积体系分析

The sedimentary analysis for K2qn Formation in Changling Depression

通过岩心观察、钻井分析及古地貌恢复等手段,对研究区沉积相类型、物源体系发育特征及油气成藏规律进行了研究。主要发育三角洲平原、三角洲前缘、滨浅湖及半深湖—深湖四种亚相;存在三大物源方向:西北、西南和东南;青一段半深湖—深湖泥岩分布广,与三角洲体系相邻,有利于形成良好的生储组合;依据沉积相带平面分布特征,长岭凹陷南部为下一步有利勘探方向。

We study the sedimentary facies,provenance and reservoir forming by cores observation,well analysis and paleogeomorphic reconstruction.There are four major sedimentary facies： delta plain,delta front,shore-shallow lacustrine and semi deep-deep lacustrine;Three main provenance directions： northwest,southwest and southeast;The lacustrine mudstone in K2qn1 formation is wide distributed,and close to the delta system,it＇s easy to form reservoirs;By the sedimentary facies researching,the south area of Changling depression is the next principal exploration target.