石油勘探与开发2026，Vol.53Issue(3)：521-532,604,13.DOI:10.11698/PED.20250548
准噶尔盆地吉木萨尔凹陷二叠系芦草沟组页岩油"组分流动"效应及其对甜点评价的意义
"Component flow"of shale oil and its significance for sweet spot evaluation in the Permian Lucaogou Formation,Jimsaer Sag,Junggar Basin,China
摘要
Abstract
Considering the complex occurrence environment and significant compositional variation of continental shale oil,as well as the uncertainties in its mobility and producible amount,this study employs geochemical analysis and production monitoring to investigate the"component flow"phenomenon of shale oil during production from the Permian Lucaogou Formation in the Jimusar Sag,Junggar Basin.It is clarified that the miscibility of different hydrocarbon components and non-hydrocarbon substances improves the flowability of multi-component hydrocarbons and non-hydrocarbons,thereby effectively enhancing the production of shale oil.Research indicates that the"lower sweet spot"has a relatively high content of light and medium hydrocarbon components and strong formation energy compared to the"upper sweet spot"of Lucaogou Formation,resulting in higher density and viscosity of the produced crude oil,which can be regarded as evidence of"component flow"of retained hydrocarbons.The"upper sweet spot"exhibits two scenarios.In areas far from faults with good preservation conditions,the high content of light and medium components in retained hydrocarbons and a high formation pressure coefficient make component flow more likely to occur.Consequently,the produced crude oil has a higher specific gravity,and the estimated ultimate recovery(EUR)per well is also higher.In areas near faults with poor preservation conditions,although the produced crude oil has a light specific gravity,the EUR per well is relatively low,indicating that the conditions for component flow of retained hydrocarbons underground have deteriorated.The study also demonstrates that preservation conditions(preventing light hydrocarbon escape and maintaining formation energy)and production strategies(controlling production pressure differential and maintaining stable operations)are important factors in regulating the occurrence and continuity of"component flow"to maximize EUR per well.These new insights can be applied to the evaluation of economically productive"sweet spots"and provide guidance for achieving optimal EUR per well in shale oil production.关键词
陆相页岩油/二叠系/芦草沟组/原油物性/组分流动/保存条件/吉木萨尔凹陷/准噶尔盆地Key words
continental shale oil/Permian/Lucaogou Formation/oil property/component flow/preservation condition/Jimsaer Sag/Junggar Basin分类
能源科技引用本文复制引用
赵文智,关铭,刘诗局,卞从胜,宋永,高岗,刘伟,李永新,樊柯廷,董劲..准噶尔盆地吉木萨尔凹陷二叠系芦草沟组页岩油"组分流动"效应及其对甜点评价的意义[J].石油勘探与开发,2026,53(3):521-532,604,13.基金项目
国家自然科学基金委员会联合基金项目"中低成熟度陆相页岩油资源形成与原位转化开采机理"(U22B6004) （U22B6004）
国家博士后资助计划(C档)(GZC20242013) （C档）
中国石油勘探开发研究院科学研究与技术开发项目"典型陆相中高熟页岩油富集特征与富集区评价"(2022yjcq03) （2022yjcq03）
