深圳大学学报（理工版）2024，Vol.41Issue(1)：33-41,9.DOI:10.3724/SP.J.1249.2024.01033
基于质量含油率的湖相页岩油可动资源评价
Assessment of movable resources of lacustrine shale oil based on mass oil content:a case study of the 2nd member of Kongdian formation in Cangdong Sag of the Bohai Bay Basin
摘要
Abstract
Shale samples commonly exhibit hydrocarbon losses and organic matter adsorption,leading to inaccurate assessments of movable shale oil resources.To address this challenge,a closed-core sample was obtained at a depth of 45 meters from well G19-25 in the Kong 2th Member of the Cangdong Sag in the Bohai Bay Basin,China.An innovative approach was adopted,involving 45 sets of comparative experiments,categorized into three types(0 h vs.24 h,closed vs.open,conventional vs.multi-temperature stages)for shale pyrolysis,and 12 sets of kerogen swelling experiments.This study established correction coefficients for light hydrocarbon recovery and organic matter adsorption.The results indicate that the average light hydrocarbon loss rate after 24 hours sample placement is 29.4%.Under open condition,the average light hydrocarbon loss rate for fractured samples is 21.0%,while for conventional pyrolysis,the average light hydrocarbon loss rate is 15.5%,and the average comprehensive loss ratio is 47.1%.The underground original light hydrocarbon is approximately twice that of conventional pyrolysis(shale oil light hydrocarbon correction coefficient Kcal = 2.0).The 12 sets of kerogen swelling experiments show that the amount of hydrocarbon adsorbed by kerogen gradually decreased with the increase of vitrinite reflectance Ro.Specifically,when Ro is between 0.8%and 1.1%,the average adsorption coefficient for shale organic matter is 0.1.A novel methodology for assessing the quality oil content method in shale oil movable resources is established,which suggests using the shale oil content rate(mass fraction of oil)Sf to characterize the movable hydrocarbon content in shale after removing hydrocarbons adsorbed by organic matter.According to this approach,the quantity of movable shale oil resources in the Kong 2th member of the Kongdian formation is 6.8×108 t.This method can provide reference for similar shale oil research in comparable basins.关键词
地质学/页岩油/资源评价/含油率/多温阶热解/孔二段/沧东凹陷Key words
geology/shale oil/resources assessment/oil content/multi-isothermal stage pyrolysis/the 2nd member of the Kongdian formation/Cangdong Sag分类
能源科技引用本文复制引用
窦煜,韩文中,王文东,董姜畅,王娜,李昊东,勐睿..基于质量含油率的湖相页岩油可动资源评价[J].深圳大学学报（理工版）,2024,41(1):33-41,9.基金项目
National Basic Research Program of China(2022YFF0801200) （2022YFF0801200）
National Natural Science Foundation of China(52274056) （52274056）
Scientific Research and Technology Development Project of China National Petroleum Corporation(2021DQ0508) 国家重点基础研究发展计划资助项目(2022YFF0801 200) （2021DQ0508）
国家自然科学基金资助项目(52274056) （52274056）
中国石油天然气股份有限公司科学研究与技术开发资助项目(2021DQ0508) （2021DQ0508）
