特种油气藏2025，Vol.32Issue(3)：35-46,12.DOI:10.3969/j.issn.1006-6535.2025.03.005
准噶尔盆地中央坳陷二叠系烃源岩差异热演化及生烃特征对油气富集规律的影响
Influence of differential thermal evolution and hydrocarbon characteristics of Permian hydrocarbon source rocks on hydrocarbon enrichment pattern in the central depression of Junggar Basin
摘要
Abstract
The Permian hydrocarbon source rocks in the central depression of the Junggar Basin are the most impor-tant source of oil and gas in the basin.To sort out the hydrocarbon-generation evolution and enrichment patterns of multi-phase oil and gas under the"source control"background,basin simulation and experimental analysis tech-niques were employed to reconstruct the thermal evolution history,hydrocarbon generation history,and accumula-tion process of the Permian hydrocarbon source rocks in different hydrocarbon-rich depressions of the central de-pression.The study shows that the Permian hydrocarbon source rocks began to mature in the Late Triassic and are currently mainly in the high-maturity condensate gas generation stage,mostly reaching the over-mature stage in the depression centers.The hydrocarbon generation process of the Permian hydrocarbon source rocks can be divided in-to three enrichment patterns:continuous injection of mature oil-rich and gas-poor type,multi-stage adjustment of deeply buried high-maturity gas-rich type,and early loss of early-mature oil and gas-rich type,with the peak hy-drocarbon generation rate reaching up to 450 mg/g.The Mahu Sag tight oil and shale oil,the conventional oil of the Triassic system in the western annular zone of the Shawan Sag(west of Well Pen 1),the tight gas of the Permian system in the eastern annular zone,and the shale gas within Permian source in the Dongdaohai Sag are the four oil and gas enrichment areas in the study area.The research results can provide important support for the next step of oil and gas exploration in this area.关键词
烃源岩/热演化/油气成藏/二叠系/准噶尔盆地Key words
hydrocarbon source rock/thermal evolution/hydrocarbon accumulation/Permian/Junggar Basin分类
能源科技引用本文复制引用
韩杨,杨海波,蒋文龙,杨皝,项威,郭文建,王韬..准噶尔盆地中央坳陷二叠系烃源岩差异热演化及生烃特征对油气富集规律的影响[J].特种油气藏,2025,32(3):35-46,12.基金项目
中国石油科技重大专项"中石油'十四五'油气资源评价"(2023YQX201) （2023YQX201）
中国石油青年科技专项"准噶尔盆地碱湖相超深层油气相态成因及生烃潜力评价"(2024DQ03003) （2024DQ03003）
