准噶尔盆地阜东地区石炭系松喀尔苏组烃源岩评价及气源对比
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摘要
准噶尔盆地F26石炭系高产气井的出现,表明阜东地区发育石炭系有效烃源岩。为了落实阜东地区石炭系烃源岩的规模,通过对所有钻遇石炭系松喀尔苏组烃源岩的19口井进行系统分析和评价,证实阜东地区石炭系具备规模勘探潜力。①阜东地区石炭系松喀尔苏组发育炭质泥岩、凝灰质泥岩,是中等—好的煤系烃源岩,TOC含量为0.54%～41.2%,以Ⅲ型干酪根为主。由于烃源岩采样点处于北三台凸起高部位,烃源岩成熟度偏低,平均为0.88%。②阜东地区天然气主要为源自石炭系的高熟煤型气和源自侏罗系的低熟煤型气,以干气为主。来自石炭系的高熟煤型气等效成熟度一般在1.2%以上,表明阜东、北三台地区石炭系生烃灶位于阜康凹陷区或北三台凸起深部。③沙奇隆起及阜康、北三台、吉木萨尔地区在石炭纪为前陆盆地的隆后斜坡,处于浅水环境,具备发育规模煤系烃源岩的构造背景。阜东、北三台地区具备天然气勘探的巨大潜力,有望成为继克拉美丽大气田以后又一天然气规模勘探区。
The high yield gas production of Well F26 shows that effective source rocks are developed in the Carboniferous.In order to evaluate the scale of the Carboniferous source rocks in the eastern Fukang Sag of the Junggar Basin,19 wells in the Carboniferous Songkaersu Formation were systematically studied.The research results show that the Carboniferous of eastern Fukang Sag has great potential in gas exploration.(1)The Carboniferous Songkaersu Formation is moderately-rich coal-bearing source rocks.The TOCis0.54%-41.2%,with TypeⅢ kerogen as the dominant source.As the source rock is located at the high position of the Beisantai Uplift,the maturity of the source rock is low,with an average of 0.88%.(2)The natural gas in Fudong area is mainly high-maturity coal-derived gas sourced from Carboniferous and low-maturity coal-derived gas sourced from Jurassic,with dry gas as the main source.The equivalent maturity of high-maturity coal-derived gas from the Carboniferous system is generally above 1.2%,indicating that the Carboniferous hydrocarbon generation stoves in the Fukang Sag or in the deep part of the Beisantai Uplift.(3)Shaqi Uplift and Fukang Sag,Jimusaer Sag were situated in the back-bulge slope,where is very suitable for coal source rock development.It is considered that the Fudong and Beisantai areas have great potential for natural gas exploration and are expected to become another natural gas scale exploration area after the Kelameili gas field.
The high yield gas production of Well F26 shows that effective source rocks are developed in the Carboniferous.In order to evaluate the scale of the Carboniferous source rocks in the eastern Fukang Sag of the Junggar Basin,19 wells in the Carboniferous Songkaersu Formation were systematically studied.The research results show that the Carboniferous of eastern Fukang Sag has great potential in gas exploration.(1)The Carboniferous Songkaersu Formation is moderately-rich coal-bearing source rocks.The TOCis0.54%-41.2%,with TypeⅢ kerogen as the dominant source.As the source rock is located at the high position of the Beisantai Uplift,the maturity of the source rock is low,with an average of 0.88%.(2)The natural gas in Fudong area is mainly high-maturity coal-derived gas sourced from Carboniferous and low-maturity coal-derived gas sourced from Jurassic,with dry gas as the main source.The equivalent maturity of high-maturity coal-derived gas from the Carboniferous system is generally above 1.2%,indicating that the Carboniferous hydrocarbon generation stoves in the Fukang Sag or in the deep part of the Beisantai Uplift.(3)Shaqi Uplift and Fukang Sag,Jimusaer Sag were situated in the back-bulge slope,where is very suitable for coal source rock development.It is considered that the Fudong and Beisantai areas have great potential for natural gas exploration and are expected to become another natural gas scale exploration area after the Kelameili gas field.
引文
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[18]Tao Huifei,Wang Qingchen,Sun Shu,et al.The depositional environment and tectonic setting of the Early Carboniferous Nanmingshui Group,in northeast margin of the Junggar Basin[J].Chinese Journal of Geology,2012,47(4):941-954.陶辉飞,王清晨,孙枢,等.准噶尔盆地东北缘早石炭世南明水组沉积环境及构造背景分析[J].地质科学,2012,47(4):941-954.
[19]Kuang Jun.Terrene connection,formation and evolution of Junggar Basin[J].Xinjiang Petroleum Geology,1993,14(2):126-132.况军.地体拼贴与准噶尔盆地的形成演化[J].新疆石油地质,1993,14(2):126-132.
[20]Yang Gaoxue,Li Yongjun,Li Zhucang,et al.Genesis and tectonic settings of post-collision volcanic rocks in north eastern margin of east Junggar,Xinjiang[J].Earth Science Frontier,2010,17(1):49-60.杨高学,李永军,李注苍,等.东准噶尔东北缘后碰撞火山岩成因与构造环境[J].地学前缘,2010,17(1):49-60.
[21]Mao Zhiguo,Zou Caineng,Zhu Rukai,et al.Geochemical characteristics and tectonic settings of Carboniferous volcanic rocks in Junggar Basin[J].Acta Petrologica Sinica,2010,26(1):207-216.毛治国,邹才能,朱如凯,等.准噶尔盆地石炭纪火山岩岩石地球化学特征及其构造环境意义[J].岩石学报,2010,26(1):207-216.
[2]Zhao Yingcheng,Tan Kaijun,Wang Peng,et al.Geochemical characteristics of Carboniferous source rocks and distribution in the eastern part of Junggar Basin[J].Natural Gas Geoscience,2011,22(5):753-759.赵应成,谭开俊,王鹏,等.准东地区石炭系烃源岩特征及分布规律[J].天然气地球科学,2011,22(5):753-759.
[3]Gong Deyu,Lan Wenfang,Xiang Hui,et al.Genetic types and origins of natural gases from the eastern Junggar Basin[J].Journal of China University of Mining&Technology,2019,48(1):142-152.龚德瑜,蓝文芳,向辉,等.准噶尔盆地东部地区天然气地化特征与成因来源[J].中国矿业大学学报,2019,48(1):142-152.
[4]Hou Maoguo,Zha Ming,Chen Hong,et al.Analysis of hydrocarbon potential of Carboniferous Tuffite in Beisantai swell,Junggar Basin[J].Xinjiang Petroleum Geology,2016,37(5):537-541.侯茂国,查明,陈洪,等.准噶尔盆地北三台凸起石炭系沉凝灰岩生烃潜力分析[J].新疆石油地质,2016,37(5):537-541.
[5]He Kai,Li Peijun,He Xianying,et al.The reservoir-formed conditions and exploration target Carboniferous in Beisantai area[J].Xinjiang Petroleum Geology,2001,22(5):421-423.贺凯,李培俊,何贤英,等.北三台地区石炭系成藏条件及勘探方向[J].新疆石油地质,2001,22(5):421-423.
[6]Qian Yu,Wang Zuodong,Zhang Ting,et al.Geochemical characteristic of Jurassic source rocks and natural gas in the eastern Junggar Basin and exploration potential of low-mature gas[J].Acta Petrolei Sinica,2017,38(1):44-54.钱宇,王作栋,张婷,等.准噶尔盆地东部侏罗系烃源岩和天然气地球化学特征及低熟气勘探前景[J].石油学报,2017,38(1):44-54.
[7]Xue Xinke,Li Xinbing,Wang Junhuai.Reservoir formation mode and exploration target in the eastern Junggar Basin[J].Xinjiang Petrleum Geology,2000,21(6):462-464.薛新克,李新兵,王俊怀.准噶尔盆地东部油气成藏模式及勘探目标[J].新疆石油地质,2000,21(6):462-464.
[8]Wang Xulong,Zhao Mengjun,Xiang Baoli,et al.Carboniferous source rocks in the Ludong-Wucaiwan area,Junggar Basin,NW China[J].Petroleum Exploration and Development,2010,37(5):523-530.王绪龙,赵孟军,向宝力,等.准噶尔盆地陆东-五彩湾地区石炭系烃源岩[J].石油勘探与开发,2010,37(5):523-530.
[9]Zhang Shengyin,Ren Benbing,Jiang Yiyang,et al.Geochemical characteristics and the origin of natural gas in Carboniferous,eastern Junggar Basin[J].Natural Gas Geoscience,2015,26(supplement 2):148-157.张生银,任本兵,姜懿洋,等.准噶尔盆地东部石炭系天然气地球化学特征及成因[J].天然气地球科学,2015,26(增刊2):148-157.
[10]He Dengfa,Chen Xinfa,Kuang Jun,et al.Distribution of Carboniferous source rocks and petroleum systems in the Junggar Basin[J].Petroleum Exploration and Development,2010,37(4):397-408.何登发,陈新发,况军,等.准噶尔盆地石炭系烃源岩分布与含油气系统[J].石油勘探与开发,2010,37(4):397-408.
[11]Gong D Y,Song Y,Wei Y Z,et al.Geochemical characteristics of Carboniferous coaly source rocks and natural gases in the southeastern Junggar Basin,NW China:Implications for new hydrocarbon explorations[J].International Journal of Coal Geology,2019,202:171-189.
[12]Chen Jianping,Zhao Changyi,He Zhonghua.Hydrocarbon generation potential of organic matters in coal source rocks and evaluation standard[J].Petroleum Exploration and Development,1997,24(1):1-5.陈建平,赵长毅,何忠华.煤系有机质生烃潜力评价标准探讨[J].石油勘探与开发,1997,24(1):1-5.
[13]Li Lin,Chen Shijia,Yang Disheng,et al.Hydrocarbon generation capacity analysis of Carboniferous source rocks in Dishuiquan Sag of Junggar Basin[J].Journal of China University of Petroleum:Natural Science Edition,2013,37(4):52-58.李林,陈世加,杨迪生,等.准噶尔盆地滴水泉凹陷石炭系烃源岩生烃能力分析[J].中国石油大学学报:自然科学版,2013,37(4):52-58.
[14]Gong Shuhua,Zhou Shixin,Li Jing,et al.Comparisons of geochemical characteristics of Carboniferous and Permian main source rocks in Junggar Basin[J].Natural Gas Geoscience,2013,24(5):1005-1015.巩书华,周世新,李靖,等.准噶尔盆地石炭系与二叠系主力烃源岩地球化学特征对比研究[J].天然气地球科学,2013,24(5):1005-1015.
[15]Bernard B B,Brooks J M,Sackett W M.Light hydrocarbons in recent Texas continentals shelf and slope sediments[J].Journal of Geophysical Research,1978,83(C8):4053-4061.
[16]Liu Wenhui,Xu Yongchang.A two-stage model of carbon isotopic fractionation in coal-gas[J].Geochimica,1999,28(4):359-366.刘文汇,徐永昌.煤型气碳同位素演化二阶段分馏模式及机理[J].地球化学,1999,28(4):359-366.
[17]Mao Xiang,Li Jianghai,Zhang Huatian,et al.Study on the distribution and developmental environment of the Late Paleozoic volcanoes in Junggar Basin and its adjacent areas[J].Acta Petrologica Sinica,2012,28(8):2381-2391.毛翔,李江海,张华添,等.准噶尔盆地及其周缘地区晚古生代火山机构分布与发育环境分析[J].岩石学报,2012,28(8):2381-2391.
[18]Tao Huifei,Wang Qingchen,Sun Shu,et al.The depositional environment and tectonic setting of the Early Carboniferous Nanmingshui Group,in northeast margin of the Junggar Basin[J].Chinese Journal of Geology,2012,47(4):941-954.陶辉飞,王清晨,孙枢,等.准噶尔盆地东北缘早石炭世南明水组沉积环境及构造背景分析[J].地质科学,2012,47(4):941-954.
[19]Kuang Jun.Terrene connection,formation and evolution of Junggar Basin[J].Xinjiang Petroleum Geology,1993,14(2):126-132.况军.地体拼贴与准噶尔盆地的形成演化[J].新疆石油地质,1993,14(2):126-132.
[20]Yang Gaoxue,Li Yongjun,Li Zhucang,et al.Genesis and tectonic settings of post-collision volcanic rocks in north eastern margin of east Junggar,Xinjiang[J].Earth Science Frontier,2010,17(1):49-60.杨高学,李永军,李注苍,等.东准噶尔东北缘后碰撞火山岩成因与构造环境[J].地学前缘,2010,17(1):49-60.
[21]Mao Zhiguo,Zou Caineng,Zhu Rukai,et al.Geochemical characteristics and tectonic settings of Carboniferous volcanic rocks in Junggar Basin[J].Acta Petrologica Sinica,2010,26(1):207-216.毛治国,邹才能,朱如凯,等.准噶尔盆地石炭纪火山岩岩石地球化学特征及其构造环境意义[J].岩石学报,2010,26(1):207-216.
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