焉耆盆地煤系源岩特征、生烃机理及烃源岩倾向性研究
Research on Characteristics and Hydrocarbon-generating Mechanism of Jurassic Coal Measures Source Rock of Yanqi Basin and Analysis on Hydrocarbon-generating Capacity and Tendency(Liquid and Gas) of Different Source Rock
-
摘要: 焉耆盆地位于南天山造山带东部,是在华力西期褶皱基底上形成的中新生代含煤沉积盆地.作为西部地区一个小型的侏罗纪含油气盆地,焉耆盆地除与周缘的塔里木、吐哈盆地有相似性外,亦有自己独特的地质条件,即:改造型盆地、煤系生烃和高地温梯度.通过研究认为,煤系源岩特征是决定生烃能力的内因,高地温梯度则是促使油气生成的外因.笔者通过现今地温的测量和岩石热导率的分析,认为焉耆盆地博湖坳陷现今地温梯度较高,其原因主要是该盆地大地热流值较高,认为地温梯度高的原因来自地内深处.从侏罗系煤系源岩的类型、特征、分布,到对其有机显微组分:镜质组、惰性组、壳质组、腐泥组的组成,开展了侏罗纪煤系烃源岩倾气倾油性评价;尤其是进行热压模拟实验,开展中下侏罗统煤岩、碳质泥岩和煤系泥岩热压模拟液态烃、气态烃产率分析.指出侏罗系煤系源岩液态产烃率以煤岩为最高、泥岩次之、碳质泥岩最差;气态产烃率则以泥岩为最高、煤岩次之、碳质泥岩最差.Abstract: Yanqi Basin, located in the east of South Tianshan orogenic belt, is a Mesozoic-Cenozoic coal-bearing basin formed on the Hercynian folded basement. As a small Jurassic petroliferous basin in western area, Yanqi basin has its own unique geological conditions besides similarity with Tarim and Turpan-Hami basin. It is a reformed basin of hydrocarbon-generating coal stratum and high geothermal gradient. Research shows that characteristics of coal measure source rocks determine hydrocarbon capacity while high geothermal gradient drive oil and gas generation. Analysis on present geothermal measurement and thermal conductivity shows that the major cause of present high geothermal gradient in Bohu depression of Yanqi basin is high terrestrial heat flow and it is believed that the origin of the high geothermal gradient is from deep underground. On the basis of types, characteristics, distribution and organic maceral including vitrinite, inertinite, exinite and sapropelinite of Jurassic coal measure source rock, evaluation of oil-gas tendency and heat-press simulation experiment, analysis on liquid and gas hydrocarbons yield of coal rock, carbonaceous mudstones and coaly mudstone of middle-lower Jurassic were carried out. The conclusion shows that liquid hydrocarbons yield are, in order, coal rock, mudstones and carbonaceous mudstones respectively and gas hydrocarbons yield are, in order, mudstones, coal rock and carbonaceous mudstones respectively.
-
-
张厚福.石油地质学新进展[M].北京:石油工业出版社,1998.
ZHANG Houfu.New development of petroleum geology[M].Beijing:Petroleum Press,1998.
姚亚明,刘池阳,赵增录,等. 焉耆盆地构造演化与油气聚集[J].新疆石油地质,2003,24(2):115-117.
YAO Yaming,LIU Chiyang,ZHAO Zenglu,et al.Structural evolution and hydrocarbon accumulation in Yanqi basin [J].Xinjiang Petoleum geology,2003,24(2):115-117.
李勇,王平,孙明.志丹油田樊川区长6油层沉积与储层特征研究[J].西北地质,2013,46(3):174-182.
LI YONG,WANG Ping,SUN Ming.Sedimentary features and reservoir characteristics of Chang 6 strata of Fanchuan district,Zhidan oilfield[J].Northwestern Geology,2013,46(3):174-182.
李德生.迈向新世纪的中国石油地质学[J].石油学报,2000,21(2):1-8.
LI Desheng.The progress in the petroleum geogly of China toward new century[J].Acta Petrolei Sinica,2000,21(2):1-8.
余琪祥,史政,王登高,等.塔里木盆地西北部氦气富集特征与成藏条件分析[J].西北地质,2013,46(4):215-221.
YU Qixiang,SHI Zheng,WANG Denggao,et al.Analysis on helium enrichment characteristics and reservoir forming conditions in Northwest Tarim Basin[J]. Northwestern Geology,2013,46(4):215-221.
宋和平,张炜.鄂尔多斯盆地下寺湾地区三叠系下组合地层石油地质特征及勘探方向[J].西北地质,2011,44(4):122-131.
SONG Heping,ZHANG Wei.Oil geological characteristics and exploration trend of Triassic lower group in Xiasiwan area of Ordos basin[J].Northwestern Geology, 2011,44(4):122-131.
张鹏飞.含煤岩系沉积学研究的几点思考[J].沉积学报,2003,21(1):68-72.
ZHANG Pengfei.Some consideration on coal measures sedimentology[J].Acta Sedimentology Sinica, 2003,21(1):68-72.
郭继刚,庞雄奇,刘丹丹,等.库车坳陷中、下侏罗统煤系烃源岩排烃特征及资源潜力评价[J].天然气地球科学,2012,23(2):327-334.
GUO Jigang,PANG Xiongqi,LIU Dandan,et al.Hydrocarbon expulsion for Middle-Lower Jurassic coal measures and evaluation of potential resource in Kuqa depression[J].Natural Gas Geosciences,2012,23(2):327-334.
何等发,李德生,何金有,等.塔里木盆地库车坳陷和塔西南坳陷油气地质特征类比及勘探启示[J].石油学报,2013,34(2):201-218.
HE Dengfa,LI Desheng,HE Jinyou,et al.Comparison in petroleum geology between Kuqa depression and Southwest depression in Tarim basin and its exploration significance[J]. Acta Petrolei Sinica, 2013,34(2):201-218.
白海峰,马占荣, 刘宝宪. 鄂尔多斯盆地南缘下奥陶统马家沟组马六段成藏潜力分析[J].西北地质,2010,43(1):107-114.
BAI Haifeng,MA Zhanrong,LIU Baoxian. Reservior-forming potential of Majiangou formation Ma-6 section in Lower Ordovician in southern margin of Ordos basin[J]. Northwestern Geology,2010,43(1):107-114.
赵兴起,陈践发,赵红静,等.吐哈盆地台北凹陷天然气地球化学特征及成因分析[J].天然气地球科学,2013,24(3):612-620.
ZHAO Xingqi,CHEN Jianfa,ZHAO Hongjing,et al.Geochemical characteristics and origin of natural gas in Taibei depression, Turpan-Harim basin[J].Natural Gas Geosciences, 2013, 24(3):612-620.
高建平,周立发,徐艳萍,等.太康隆起和周口坳陷上古生界煤系烃源岩地球化学特征[J]. 西北地质,2006,39(3):59-64.
GAO Jianping,ZHOU Lifa,XU Yanping,et al.Geochemical characteristics of the upper Paleozoic source rocks in Taikang Rise and Zhoukou depression[J].Northwestern Geology,2006,39(3):59-64.
姚亚明,张育民,付代国,等.焉耆盆地博湖坳陷古地温与油气形成关系[J].石油勘探与开发,2004,31(1):24-27.
YAO Yaming,ZHANG Yumin,FU Daiguo,et al.Relationship between paleogeothermal and hydrocarbon formation in the Yanqi basin,Northwest China[J].Petroleum Exploration and Development,2004,31(1):24-27.
李宽亮,张炜,田靖.鄂尔多斯盆地八连沟—金庄地区长6储层特征及影响因素分析[J].西北地质,2011,44(4):132-139.
LI Kuanliang,ZHANG Wei,TIAN Jing.Influential factors and characteristics of Chang 6 bed reservoir in Baliangou-Jinzhuang area of Nanniwan oil field,Ordos basin[J]. Northwestern Geology,2011,44(4):132-139.
赵文智,胡素云,王红军,等.中国中低丰度油气资源大型化成藏与分布[J].石油勘探与开发,2013,40(1):1-13.
ZHAO Wenzhi,HU Suyun,WANG Hongjun,et al.Large-scale accumulation and distribution of medium-low abundance hydrocarbon resources in China[J].Petroleum Exploration and Development,2013,40(1):1-13.
-
计量
- 文章访问数: 2570
- PDF下载数: 2882
- 施引文献: 0
下载: