地质科技通报2026，Vol.45Issue(1)：38-52,15.DOI:10.19509/j.cnki.dzkq.tb20240153
准噶尔盆地哈山地区风城组烃源岩品质差异性分析
Quality difference analysis of source rocks in the Fengcheng Formation,Hashan area,Junggar Basin
摘要
Abstract
Shale oil in the Permian Fengcheng Formation of the Hashan area shows promising momentum,with breakthroughs achieved in multiple wells.Previous research indicates that the Fengcheng Formation in the Hashan area is mainly composed of four lithofacies:terrigenous clastic lithofacies,dolomitic mixed lithofacies,volcanic clastic-bearing mixed lithofacies,and alkaline mineral-bearing mixed lithofacies,within which various types of source rocks have developed.[Objective]To further evaluate the quality of these source rocks and the factors controlling it,[Methods]this study investigates the sedimentary background and conducts a lithofacies-based evaluation.The aim is to identify lithofacies containing high-quality source rocks and to analyze the controlling factors of source rock quality,thereby clarifying the further exploration directions.[Results]The results show that,among the mudstones in the Fengcheng Formation of the Hashan area,the volcanic clastic-bearing mixed lithofacies has the highest total organic matter content,whereas the dolomitic mixed lithofacies has the greatest hydrocarbon generation potential.The kerogen of the mudstones in the Fengcheng Formation of the Hashan area is mainly TypeⅠ-Ⅱ.The mudstone maturity in the western section of Hashan area ranges from 0.79%to 0.97%Ro,while in the middle section,Ro is mainly between 1.2%and 1.37%.[Conclusion]The source rock quality in the Fengcheng Formation of the Hashan area is mainly controlled by sedimentary environment,hydrocarbon-generating parent material,maturity,alkaline minerals,and volcanic activity.Organic matter in dolomitic mixed lithofacies and alkaline mineral-bearing mixed lithofacies is more enriched in deep-water,reducing,medium-to-high salinity,and arid environments.In contrast,organic matter in terrigenous clastic lithofacies and volcanic clastic-bearing mixed lithofacies is more enriched in relatively shallow-water,oxygen-poor,low-salinity,and arid-semi-arid environments.Green algae(dunaliella-like)developed in high-salinity areas of the sedimentary center exhibit higher oil and gas conversion rates,enabling dolomitic mixed-lithofacies mudstones to have high hydrocarbon generation potential even with low organic matter abundance.Increased maturity and alkaline minerals reduce the measured TOC(total organic carbon)content and hydrocarbon generation potential,while an appropriate amount of volcanic clastics provides favorable conditions for the organic matter enrichment.关键词
哈山地区/风城组/烃源岩/生烃母质/碱性矿物/火山作用/准噶尔盆地Key words
Hashan area/Fengcheng Formation/source rock/hydrocarbon generation parent material/alkaline minerals/volcanism/Junggar Basin分类
能源科技引用本文复制引用
孙中良,张奎华,宋振响,于洪洲,王斌,宋梅远,李志明,曹婷婷..准噶尔盆地哈山地区风城组烃源岩品质差异性分析[J].地质科技通报,2026,45(1):38-52,15.基金项目
国家自然科学基金项目(42090020) （42090020）
国家重点实验室项目(KLP24017) （KLP24017）
