东北石油大学学报2025，Vol.49Issue(6)：1-15,15.DOI:10.3969/j.issn.2095-4107.2025.06.001
陆相断陷湖盆页岩典型成岩作用对储集性能的控制
The contolling effect of typical diagenesis on reservoir performance of continental faulted lacustrine shale:a case of shale of the ES4 S in Dongying Sag,Jiyang Depression
摘要
Abstract
Taking the typical shale of the upper sub-member of the fourth member of the Shahejie For-mation(ES4 S)in the Dongying Sag of the Jiyang Depression as the research object,methods such as core observation,thin section observation,X-ray whole-rock mineral analysis,scanning electron microscopy observation,organic geochemical testing,low-temperature nitrogen adsorption experiments,and nucle-ar magnetic resonance experiments were adopted to analyze the sedimentary environment,lithofacies and their combination characteristics of the shale,study the diagenesis of the shale,and explore the in-fluence of typical diagenetic processes on the reservoir properties of the shale.The results show that the typical shale types in the upper sub-member of the fourth member of the Shahejie Formation in the Dongying Sag are carbonate-rich shale and mixed shale.The carbonate-rich shale lithofacies assemblage mainly develops in the inner depression of the gentle slope in the Dongying Sag,while the mixed shale lithofacies assemblage develops in the deep depression of the steep slope,and the feldspar-rich and clay-rich shale lithofacies assemblage develops in the lake margin zone.The diagenetic types are diverse.The near-source dissolution of organic matter and carbonate minerals,the transformation of clay minerals and the precipitation of authigenic quartz represent the typical characteristics of the interaction between different minerals in the shale.The synergetic evolution of organic matter hydrocarbon generation and carbonate minerals-authigenic quartz-clay minerals is obvious.The dissolution and recrystallization of calcite under the background of hydrocarbon generation and acid expulsion have a good improvement effect on the reservoir properties.The precipitation of authigenic quartz and the dissolution of feldspar are typical diagenetic and reservoir-forming types of mixed shale in the steep slope.A large number of intergranular pores are retained in the authigenic quartz aggregates,and the pore expansion effect is sig-nificant.The mass percentage of feldspar and quartz minerals is approximately positively correlated with the porosity and nano-scale pore volume of the shale.This result has practical guiding significance for the selection of favorable shale reservoir areas and well location deployment in the Dongying Sag.关键词
页岩油/混合页岩/成岩作用/储集性能/沙四上亚段/东营凹陷/济阳坳陷Key words
shale oil/mixed shales/diagenesis/reservoir performance/ES4 S/Dongying Sag/Jiyang De-pression分类
能源科技引用本文复制引用
张鹏飞,王勇,张顺,魏晓亮,李军亮,滕建彬,王鑫,苗卓伟,刘鑫金,陈涛..陆相断陷湖盆页岩典型成岩作用对储集性能的控制[J].东北石油大学学报,2025,49(6):1-15,15.基金项目
国家科技重大专项(2024ZD1400100) （2024ZD1400100）
国家自然科学基金企业联合基金项目(U24B6002) （U24B6002）
