基于测井方法的辽河坳陷沙河街组页岩发育特征评价

Evaluation of the growth characteristics of organic-rich shale in Liaohe depression Es4-Es3 based on logging methods

以辽河坳陷沙四段—沙三段富有机质页岩为研究对象,根据测井、录井和有机地球化学实验分析等资料,采用多元线性回归及Δlg R方法,识别富有机质页岩;从纵向发育、横向分布和平面展布等方面,对页岩发育特征进行综合评价.结果表明:研究区富有机质泥页岩呈现"展布面积广、连续厚度大"特点,其中西部凹陷沙三下亚段富有机质页岩平均厚度约为75.20m,且厚度大于90m的富有机质页岩分布面积达到210.26km2,为页岩油气勘探的首选层位.该结果为研究区乃至东部渤海湾地区寻找新的天然气勘探领域具有指导作用.

This paper comprehensively evaluates the growth characteristics of Es4-Es3organic-rich shale in Liaohe depression,taking Es4-Es3organic-rich shale in Liaohe depression as the research object,adopting MLR andΔlg Rto qualitatively and quantitatively identify organic-rich shale,from the aspects of vertical development,transverse distribution and plane distribution,etc.This paper points out that the research area shows the feature of wide distribution and continuous thickness,and among them,the average thickness of the lower section Es3organic-rich shale in western sag is 75 m,and the distribution area of the organic-rich shale that the thickness is over 90 mreaches 210.26km2,which is the preferred position of shale oil and gas exploration.This paper is of great theoretical and practical significance in natural gas exploration field in the research area or even the Bohai bay area.