车排子凸起东翼石炭系稠油特征及成因分析
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摘要
针对车排子凸起东翼石炭系稠油特征、分布规律及成因机理认识不清的问题,利用地质、地球化学等技术手段,对区内稠油物性特征、族组成及生物标志化合物进行了精细研究,剖析了稠油成因机理、稠化过程与稠化模式。研究结果表明:车排子凸起东翼石炭系原油主体为高密度、高黏度、低蜡、低硫稠油;严重的生物降解是石炭系原油稠化的主要因素,氧化作用、水洗作用对原油稠化的贡献较小;石炭系原油经历了两期充注与稠化过程,分别为古近纪末、新近纪末红车断裂带构造拉张产生系列小断层,破坏了油藏平衡,古油藏调整后充注成藏,运移过程中遭受严重的生物降解形成稠油。研究成果对该区下步勘探部署具有重要指导意义,同时可为研究复杂稠油成因提供重要参考。
In view of the unclear understanding on the characteristics,distribution law and genetic mechanism of Carboniferous heavy oil on east flank of Chepaizi salient,the geologic and geochemical technical means were used to carry fine study on the physical characteristics,group composition and biomarker of heavy oil in the study area,and analyze the genetic mechanism,thickening process and thickening mode of the heavy oil. The study results show that the Carboniferous crude oil on east flank of Chepaizi salient is mostly high density,high viscosity,low wax content and low sulfur content heavy oil; serious biodegradation is the main factor of Carboniferous crude oil thickening; oxidation and water washing have little contribution to crude oil thickening; and Carboniferous crude oil has undergone two stages of charging and thickening,i. e.,at the end of Paleogene and Neogene,the structure of Hongche faulted zone was pulled apart,creating a series of minor faults,destroying the oil reservoir balancing,after adjustment of paleo-reservoir,hydrocarbon was charged and accumulated,and in the course of migration,the crude oil suffered from serious biodegradation,and heavy oil was formed. The study achievements have important guiding significance for the further exploration deployment in the area,and can also provide important reference for studying the complex genesis of heavy oil.
In view of the unclear understanding on the characteristics,distribution law and genetic mechanism of Carboniferous heavy oil on east flank of Chepaizi salient,the geologic and geochemical technical means were used to carry fine study on the physical characteristics,group composition and biomarker of heavy oil in the study area,and analyze the genetic mechanism,thickening process and thickening mode of the heavy oil. The study results show that the Carboniferous crude oil on east flank of Chepaizi salient is mostly high density,high viscosity,low wax content and low sulfur content heavy oil; serious biodegradation is the main factor of Carboniferous crude oil thickening; oxidation and water washing have little contribution to crude oil thickening; and Carboniferous crude oil has undergone two stages of charging and thickening,i. e.,at the end of Paleogene and Neogene,the structure of Hongche faulted zone was pulled apart,creating a series of minor faults,destroying the oil reservoir balancing,after adjustment of paleo-reservoir,hydrocarbon was charged and accumulated,and in the course of migration,the crude oil suffered from serious biodegradation,and heavy oil was formed. The study achievements have important guiding significance for the further exploration deployment in the area,and can also provide important reference for studying the complex genesis of heavy oil.
引文
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[18]张学军,徐兴友,彭平安.车排子凸起轻质油成熟度分析与烃源层再认识[J].地球化学,2013,42(2):180-187.
[19]张枝焕,李伟,孟闲龙,等.准噶尔盆地车排子隆起西南部原油地球化学特征及油源分析[J].现代地质,20017,21(1):133-140.
[20]李威,文志刚,徐耀辉,等.重排藿烷参数示踪陇东地区油藏充注途径[J].石油与天然气地质,2017,38(5):887-895.
[21]肖中尧,黄光辉,王培荣,等.塔里木盆地哈得逊及相邻地区原油含氮化合物分布特征及油藏充注方向探讨[J].地球化学,2003,32(3):263-270.
[22]胡秋媛,董大伟,赵利,等.准噶尔盆地车排子凸起构造演化特征及其成因[J].石油与天然气地质,2016,37(4):556-564.
[2]赵晓东,杨少春,向奎,等.准噶尔盆地车北地区浅层砂岩油藏顶底双油水倒置成因[J].石油勘探与开发,2014,41(4):438-444.
[3]张枝焕,刘洪军,李伟,等.准噶尔盆地车排子地区稠油成因及成藏过程[J].地球科学与环境学报,2014,36(2):18-32.
[4]赵子骏,杨少春,温雅茹,等.准噶尔盆地车北地区火山岩油藏油水分布规律研究[J].河南科学,2015,33(5):796-800.
[5]马洪,李建忠,杨涛,等.中国陆相湖盆致密油成藏主控因素综述[J].石油实验地质,2014,36(6):668-677.
[6]刘洛夫,孟江辉,王维斌,等.准噶尔盆地西北缘车排子凸起上、下层系原油的地球化学特征差异及其意义[J].吉林大学学报(地球科学版),2011,41(2):377-390.
[7]邱桂强,李素梅,庞雄奇,等.东营凹陷北部陡坡带稠油地球化学特征与成因[J].地质学报,2004,78(6):854-862.
[8]霍进,吴运强,赵增义,等.准噶尔盆地风城地区稠油特征及其成因探讨[J].特种油气藏,2008,15(2):25-27.
[9]陈建平,王兴谋,高长海,等.东营凹陷林樊家地区稠油特征及成因机制[J].特种油气藏,2016,23(5):8-11.
[10]林会喜,郭瑞超,宫亚军,等.哈山地区原油地化特征及同源双向充注效应[J].特种油气藏,2017,24(2):35-39.
[11]PETERS K E,WALTERS C C,MOLDOWAN J M. Thebiomarker guide[M]. 2nd ed. Cambridge:Cambridge U-niversity Press,2005:523-580.
[12]张守昌.辽河油区原油稠变的影响因素分析[J].特种油气藏,2004,11(5):24-26.
[13]向才富,陆友明,李军虹.松辽盆地西部斜坡带稠油特征及其成因探讨[J].地质学报,2007,81(2):255-260.
[14]王圣柱,林会喜,张奎华,等.准北缘哈山斜坡带侏罗系原油稠化机理及充注特征[J].天然气地球科学,2015,26(3):477-485.
[15]马存飞,董春梅,任丽华,等.王146地区沙四上亚段特稠油特征及成因模式[J].特种油气藏,2015,22(1):22-25.
[16]胡见义,徐树宝,程克明.中国重质油藏的地质和地球化学成因[J].石油学报,1989,10(1):1-11.
[17]张鼐.含油气盆地流体包裹体分析技术及应用[M].北京:石油工业出版社,2016:280-281.
[18]张学军,徐兴友,彭平安.车排子凸起轻质油成熟度分析与烃源层再认识[J].地球化学,2013,42(2):180-187.
[19]张枝焕,李伟,孟闲龙,等.准噶尔盆地车排子隆起西南部原油地球化学特征及油源分析[J].现代地质,20017,21(1):133-140.
[20]李威,文志刚,徐耀辉,等.重排藿烷参数示踪陇东地区油藏充注途径[J].石油与天然气地质,2017,38(5):887-895.
[21]肖中尧,黄光辉,王培荣,等.塔里木盆地哈得逊及相邻地区原油含氮化合物分布特征及油藏充注方向探讨[J].地球化学,2003,32(3):263-270.
[22]胡秋媛,董大伟,赵利,等.准噶尔盆地车排子凸起构造演化特征及其成因[J].石油与天然气地质,2016,37(4):556-564.