陆东凹陷九佛堂组火山碎屑岩地层对比与划分

Stratigraphic division and correlation of the volcaniclastic rocks from the Jiufotang Formation in the Ludong depression,Liaoning

针对陆东凹陷稳定标志层不发育、地层对比难度大的问题,在岩电特征分析的基础上,将火山作用与沉积作用相联系,确定火山喷发期次。应用井震联合层位标定技术,精细制作合成记录,建立地震标志层与井上典型岩电特征的关系,完成地层对比与划分,有效指导了储层预测和井位部署。

It is different to conduct the stratigraphic division and correlation of the volcaniclastic rocks from the Jiufotang Formation in the Ludong depression, Liaoning due to less developed key horizons, complicated petrologic compositions, high background values of well logs and rapid facies changes of proximal deposits. In the present paper, four volcanic eruption phases are established for the lower member of the Jiufotang Formation according to the sedimentary intervals and well logs. The well-seismic calibration technique is proposed to establish the relationship between the lithological and electrical characteristics and seismic marker beds, and finally to better resolve the stratigraphic division and correlation, reservoir prediction and borehole localization in the study area.