大庆石油地质与开发2024，Vol.43Issue(6)：1-10,10.DOI:10.19597/J.ISSN.1000-3754.202306044
古龙油页岩干酪根热解特性分子动力学模拟
Molecular dynamics simulation of kerogen pyrolysis of Gulong shale
摘要
Abstract
During the development of Gulong shale oil,several challenges arise such as co-production of oil and gas and significant variation in oil quality.Fluid composition resulting from hydrocarbon generation evolution in reser-voir is the foremost concern affecting its effective development.In response to aforementioned challenges,a typical kerogen matrix model of Gulong oil shale is established via molecular dynamics simulation.Subsequently,simula-tions of kerogen pyrolysis at different temperatures are performed,enabling analysis of pyrolysis product composi-tion and variations in pore structure of kerogen matrix.The result shows that at different pyrolysis temperatures,ker-ogen pyrolysis products are characterized by high proportion of C1-C5 short-chain hydrocarbons,corresponding to high gas-oil ratio.This finding aligns with the results obtained during actual development of Gulong shale oil.Kero-gen pyrolysis efficiency increases with temperature rise,however,excessively high temperature inhibits pyrolysis process.The study determines optimal pyrolysis temperature of 2 500 K.Large amount of products generated from kerogen pyrolysis tend to clog pore spaces within kerogen matrix,with collapse of kerogen skeleton causing matrix porosity reduction.Nevertheless,subsequent hydrocarbon expulsion process increases porosity significantly,facili-tating further kerogen pyrolysis.The research provides theoretical guidance for study on occurrence and migration of Gulong shale oil and effective producing in field development.关键词
古龙/页岩油/干酪根/热解/分子动力学模拟Key words
Gulong/shale oil/kerogen/pyrolysis/molecular dynamics simulation分类
天文与地球科学引用本文复制引用
吕方涛,宁正福,康瑛,刘蓓..古龙油页岩干酪根热解特性分子动力学模拟[J].大庆石油地质与开发,2024,43(6):1-10,10.基金项目
国家自然科学基金联合基金项目"海相深层油气富集机理与关键工程技术基础研究"(U19B6003-03-04) （U19B6003-03-04）
国家自然科学基金项目"页岩气多组分竞争吸附机理研究"(51774298). （51774298）
