准南中段呼探1井烃源岩条件及油气源分析  

Hydrocarbon source conditions and oil and gas source analysis of well Hutan 1 in the middle section of the southern margin of the Junggar Basin

作　　者：何丹 于淼 高岗[4,5] 靳军 马万云 张有锦 HE Dan;YU Miao;GAO Gang;JIN Jun;MA Wanyun;ZHANG Youjin(Xinjiang Laboratory of Petroleum Reserve in Conglomerate,Karamay 834000,Xinjiang,China;Key Laboratory of Conglomerate Reservoir Exploration and Development,Karamay 834000,Xinjiang,China;Research Institute of Experiment and Testing,Xinjiang Oilfield Company,PetroChina,Karamay 834000,Xinjiang,China;School of Earth Sciences,China University of Petroleum(Beijing),Beijing 102249,China;State Key Laboratory of Petroleum Resources and Prospecting,Beijing 102249,China)

机构地区：[1]新疆砾岩油藏实验室,新疆克拉玛依834000 [2]砾岩油气藏勘探开发重点实验室,新疆克拉玛依834000 [3]中国石油新疆油田分公司实验检测研究院,新疆克拉玛依834000 [4]中国石油大学(北京)地球科学学院,北京102249 [5]油气资源与探测国家重点实验室,北京102249

出　　处：《地球化学》2023年第5期605-614,共10页Geochimica

基　　金：新疆油田公司对外协作项目(2020-C4006)资助。

摘　　要：近年来,准噶尔盆地下组合油气勘探不断获得新发现。2020年12月16日,位于呼西背斜的呼探1井清水河组获得高产油气流,实现了下组合油气勘探的重大突破,预示了下组合巨大的勘探潜力,但目前呼探1井的油气主要来源于哪套烃源岩以及是否存在混源等问题尚未明确。本研究通过对准噶尔盆地南缘中段下组合主要烃源岩的评价,结合生物标志物参数、油气C同位素、全烃气相色谱以及热模拟实验结果,明确了主力烃源岩生油气能力,认为呼探1井清水河组原油为侏罗系和二叠系烃源岩生成的混源油,其中重烃部分主要来自二叠系烃源岩,轻烃部分来自侏罗系烃源岩,天然气主要来自侏罗系烃源岩。同时,建立了侏罗系煤系烃源岩生气图版,结合图版分析认为呼探1井清水河组天然气与侏罗系煤岩关系最为密切,Ro大致分布在1.66%~1.85%。Recently,new discoveries have been made regarding combined underground oil and gas exploration in the Junggar Basin.On December 16,2020,the Qingshuihe Formation of well Hutan 1 deployed in the Huxi anticline obtained a high-yield oil and gas flow,which was a major breakthrough in lower combined oil and gas exploration and predicted the huge exploration potential of lower combined oil and gas.However,there are still disputes regarding the oil and gas sources in Hutan 1,it remains uncertain which set of source rocks acts as the primary source rock for oil and gas and whether there are mixed sources.Based on an evaluation of the main source rocks of the lower combination in the middle section of the southern margin,the oil and gas generation capacity of the main source rocks was determined,and an oil and gas source comparison was performed in combination with the target material parameters,oil and gas carbon isotopes,and light hydrocarbons.The crude oil of the Qingshuihe Formation in well Hutan 1 is considered a mixed source oil generated by Jurassic and Permian source rocks,from which the heavy hydrocarbons derive mainly from Permian source rocks.In contrast,certain light hydrocarbons and natural gas primarily derive from Jurassic source rocks.Furthermore,combined with the thermal simulation test results,a gas generation chart of Jurassic coal measure source rocks was established to analyze the natural gas maturity of the Qingshuihe Formation of well Hutan 1.By integrating the thermal simulation test with the chart analysis,it becomes evident that the natural gas of the Qingshuihe Formation of well Hutan 1 can be considered to be most closely related to Jurassic coal rocks,with Ro levels ranging between 1.66%and 1.85%.

关 键 词：油气源对比 热模拟实验 烃源岩 呼探1井 准噶尔盆地 

分 类 号：P595[天文地球—地球化学]