石油勘探与开发2017，Vol.44Issue(4)：492-502,11.DOI:10.11698/PED.2017.04.02
细粒沉积岩性识别新方法与储集层甜点分析——以渤海湾盆地沧东凹陷孔店组二段为例
A new method for lithology identification of fine grained deposits and reservoir sweet spot analysis: A case study of Kong 2 Member in Cangdong sag, Bohai Bay Basin, China
摘要
Abstract
Based on systematic coring of 500 m of Kong 2 Member of the Paleogene Kongdian Formation in Cangdong sag of Bohai Bay Basin,identification and XRD (X-Ray Diffraction) analysis of over 1000 thin sections,a simplified method to quantitatively calculate contents of fine grained minerals with conventional logging data such as acoustic travel time (AC) and density log (DEN) has been proposed,and a quick lithologic identification "green mode" has been worked out in this study.By fitting the relationship between normalization of logging curves and mineral content measured by XRD,the mineral contents of sections or wells not cored can be calculated to identify lithology.With this method,several dolomite sweet spot intervals and one sandstone sweet spot interval have been found in the Kong 2 Member of Cangdong sag,where high production oil and gas flows have been tapped from drilled wells.The study shows that the dolomite is in band distribution and enriched in local parts of the study area.This method is applicable to lithologic identification of fine grained deposits in front delta-lake basin center,especially lithologic identification of mud and dolomite dominated fine grained deposits with low sand content of semi-deep,deep lake facies.关键词
细粒沉积/岩性识别/白云岩/致密油/储集层甜点/古近系孔店组/沧东凹陷/渤海湾盆地Key words
fine grained deposits/lithologic identification/dolomite/tight oil/reservoir sweet spot/Paleogene Kongdian Formation/Cangdong sag/Bohai Bay Basin分类
能源科技引用本文复制引用
赵贤正,蒲秀刚,韩文中,周立宏,时战楠,陈世悦,肖敦清..细粒沉积岩性识别新方法与储集层甜点分析——以渤海湾盆地沧东凹陷孔店组二段为例[J].石油勘探与开发,2017,44(4):492-502,11.基金项目
中国石油科技重大专项“大港油区大油气田勘探开发关键技术研究”(2014E-06) （2014E-06）
