石油勘探与开发2026，Vol.53Issue(1)：1-13,13.DOI:10.11698/PED.20250583
陆相中低熟页岩油富集机理与原位转化最佳开采方式
Enrichment mechanism and optimal in-situ conversion recovery method of lacustrine low-to-medium maturity shale oil
摘要
Abstract
In-situ heating conversion is the most practical recovery method for lacustrine low-to-medium maturity shale oil.However,the energy output-input ratio must exceed the economic threshold to achieve commercial development.This paper systematically investigates the mechanism of super-rich accumulation of organic matter in continental shale,sweet spot evaluation,optimal heating windows,and appropriate well types and patterns from the perspectives of enhancing energy output and reducing energy input.(1)The super-rich accumulation of organic matter in lacustrine shale is primarily controlled by the intensity,frequency,and preservation of external material inputs,and is related to moderate volcanic and hydrothermal activities,marine transgressions,with total organic carbon content greater than or equal to 6％.(2)The quality of organic-rich intervals is related to the type of source material and hydrocarbon generation potential.The in-situ conversion-derived hydrocarbon quality index(HQI)is established,and the zones exhibiting HQI＞450 are defined as sweet spots.(3)Considering the characteristics of the organic matter conversion material field and seepage field,the temperature interval 300-370 ℃ is recommended as the optimal heating window for the Chang 73 sub-member of the Triassic Yanchang Formation in the Ordos Basin.Based on the advantages of thermal conductivity,permeability,and hydrocarbon expulsion efficiency along the bedding direction during in-situ heating,the"horizontal well heating+vertical well development"scheme is proposed,which has demonstrated significant enhancement in both recovery factor and energy output-input ratio,making it the optimal in-situ conversion process.The research findings provide a theoretical and technical foundation for the economical and efficient development of low-to medium-maturity shale oil.关键词
陆相中低熟页岩油/原位转化/最佳升温窗口/水平井+直井/能量产投比/有机质超量富集/可再生能源Key words
lacustrine low-to-medium maturity shale oil/in-situ conversion/optimal heating window/horizontal well+vertical well/energy output-input ratio/super-rich accumulation of organic matter/renewable energy分类
能源科技引用本文复制引用
赵文智,李蕊瑞,李永新,董劲,关铭,边雷博,刘伟,卞从胜,胥蕊娜,王晓梅,吕伟峰,金家锋,姚传进,熊驰..陆相中低熟页岩油富集机理与原位转化最佳开采方式[J].石油勘探与开发,2026,53(1):1-13,13.基金项目
国家自然科学基金企业创新发展联合基金项目(U22B6004) （U22B6004）
国家自然科学基金青年科学基金项目(4250021468) （4250021468）
中国石油长庆油田公司关键核心技术攻关项目(KJZX2023-01) （KJZX2023-01）
