东海盆地西湖凹陷原油地化特征及来源分析
|
摘要
将地化、地质分析相结合,分析了东海陆架盆地西湖凹陷中央背斜带、三潭深凹和保俶斜坡原油的地化特征,进行了油源对比,并梳理了油气成藏过程。不同构造带原油成熟度、母质来源及成藏过程存在差异:西湖凹陷原油成熟度分布在成熟—高成熟范围,中央背斜带以成熟原油为主,三潭深凹和保俶斜坡原油在成熟—高成熟范围均有分布。油源对比结果显示,中央背斜带花港组原油的源岩以花港组泥质烃源岩为主;三潭深凹花港组原油的源岩以平湖组和花港组泥质烃源岩为主;保俶斜坡平湖组原油源岩以平湖组煤系烃源岩为主;保俶斜坡宝石组原油的源岩以宝石组泥质烃源岩为主。西湖凹陷原油普遍具有"蒸发分馏、气洗分馏"的成藏机制,以保俶斜坡原油最为典型。
The geochemical characteristics of oil in the Central Anticline, Santan Sag and Baochu Slope were determined, and the oil source correlation and the process of oil accumulation were analyzed based on geological and geochemical analyses. There are differences in crude oil maturity, parent material source and accumulation process in different tectonic zones. The crude oil in the Xihu Sag is distributed in the mature or high maturity range. The Central Anticline is dominated by mature crude oil, and that in the Santan Sag and Baochu Slope is in the mature or high maturity range. The oil source correlation results show that the crude oil in the Huagang Formation mainly sourced from the argillaceous source rocks in the Huagang Formation in the Central Anticline, and the argillaceous source rocks in the Pinghu and Huagang formations in the Santan Sag. The crude oil in the Pinghu Formation on the Baochu Slope mainly originated from the coal-series source rocks in the Pinghu Formation, while those in the Baoshi Formation mainly sourced from the argillaceous source rocks in the Baoshi Formation. The crude oil in the Xihu Sag generally has the accumulation mechanism of "evaporative fractionation and gas-washing fractionation", and those on the Baochu Slope are the most typical.
The geochemical characteristics of oil in the Central Anticline, Santan Sag and Baochu Slope were determined, and the oil source correlation and the process of oil accumulation were analyzed based on geological and geochemical analyses. There are differences in crude oil maturity, parent material source and accumulation process in different tectonic zones. The crude oil in the Xihu Sag is distributed in the mature or high maturity range. The Central Anticline is dominated by mature crude oil, and that in the Santan Sag and Baochu Slope is in the mature or high maturity range. The oil source correlation results show that the crude oil in the Huagang Formation mainly sourced from the argillaceous source rocks in the Huagang Formation in the Central Anticline, and the argillaceous source rocks in the Pinghu and Huagang formations in the Santan Sag. The crude oil in the Pinghu Formation on the Baochu Slope mainly originated from the coal-series source rocks in the Pinghu Formation, while those in the Baoshi Formation mainly sourced from the argillaceous source rocks in the Baoshi Formation. The crude oil in the Xihu Sag generally has the accumulation mechanism of "evaporative fractionation and gas-washing fractionation", and those on the Baochu Slope are the most typical.
引文
[1] 陶士振,邹才能.东海盆地西湖凹陷天然气成藏及分布规律[J].石油勘探与开发,2005,32(4):103-110. TAO Shizhen,ZOU Caineng.Accumulation and distribution of natural gases in Xihu Sag,East China Sea Basin[J].Petroleum exploration and Development,2005,32(4):103-110.
[2] 王国纯.东海盆地油气勘探焦点问题探讨[J].中国海上油气(地质),2003,17(1):29-32. WANG Guochun.A discussion on some focal problems of petroleum exploration in East China Sea Basin[J].China Offshore Oil and Gas(Geology),2003,17(1):29-32.
[3] 苏奥,陈红汉,王存武,等.东海盆地西湖凹陷油气成因及成熟度判别[J].石油勘探与开发,2013,40(5):521-527. SU Ao,CHEN Honghan,WANG Cunwu,et al.Genesis and maturity identification of oil and gas in the Xihu Sag,East China Sea Basin[J].Petroleum Exploration and Development[J].2013,40(5):521-527.
[4] 傅宁,李友川,陈桂华,等.东海西湖凹陷油气“蒸发分馏”成藏机制[J].石油勘探与开发,2003,30(2):39-42. FU Ning,LI Youchuan,CHEN Guihua,et al.Pooling mechanisms of “evaporating fractionation” of oil and gas in the Xihu Depression,East China Sea[J].Petroleum Exploration and Development,2003,30(2):39-42.
[5] 朱扬明,周洁,顾圣啸,等.西湖凹陷始新统平湖组煤系烃源岩分子地球化学特征.石油学报,2012,33(1):32-39. ZHU Yangming,ZHOU Jie,Gu Shengxiao,et al.Molecular geochemistry of Eocene Pinghu Formation coal-bearing source rocks in the Xihu Depression,East China Sea Shelf Basin[J].Acta Petrolei Sinica,2012,33(1):32-39.
[6] 贾健谊,须雪豪,孙伯强.东海西湖凹陷原油与天然气的地球化学特征[J].海洋石油,2000,20(2):1-7. JIA Jianyi,XU Xuehao,SUN Boqiang. Oil/gas geochemical character in the Xihu Trough of the East China Sea[J].Offshore Oil,2000,20(2):1-7.
[7] 叶军,郭迪孝.东海西湖凹陷天然气地化特征[J].石油实验地质,1996,18(2):174-181. YE Jun,GUO Dixiao.Geochemical characters of the natural gas in West Lake Depression,the East China Sea[J].Experimental Petroleum Geology,1996,18(2):174-181.
[8] 张银国.东海西湖凹陷花港组油气地质条件与油气分布规律[J].石油实验地质,2010,32(3):223-226. ZHANG Yinguo.Petroleum geology and hydrocarbon distribution pattern of Huagang Formation in the Xihu Sag of the East China Sea[J].Petroleum Geology & Experiment,2010,32(3):223-226.
[9] 秦兰芝,刘金水,李帅,等.东海西湖凹陷中央反转带花港组锆石特征及物源指示意义[J].石油实验地质,2017,39(4):498-504,526. QIN Lanzhi,LIU Jinshui,LI Shuai,et al.Characteristics of zircon in the Huagang Formation of the central inversion zone of Xihu Sag and its provenance indication[J].Petroleum Geology & Experiment,2017,39(4):498-504,526.
[10] 李宁,覃军,江瀚,等.西湖凹陷T气田油气分布特征与主控因素[J].断块油气田,2017,24(3):329-332. LI Ning,QIN Jun,JIANG Han,et al.Hydrocarbon distribution features and its main controlling factors of T gas field,Xihu Sag,East China Sea Shelf Basin[J].Fault-Block Oil and Gas Field,2017,24(3):329-332.
[11] 苏奥,陈红汉,马玉华,等.东海盆地西湖凹陷孔雀亭气区气侵条件及主控因素[J].天然气地球科学,2015,26(2):292-300. SU Ao,CHEN Honghan,MA Yuhua,et al.Geologic conditions and main controlling factors of gas washing in Kongqueting region in Xihu Depression,Eastern Sea Basin[J].Natural Gas Geoscience,2015,26(2):292-300.
[12] 吴江,侯读杰,许汇源,等.东海盆地西湖凹陷原油轻烃地球化学特征及油源区分[J].东北石油大学学报,2015,39(5):23-31. WU Jiang,HOU Dujie,XU Huiyuan,et al.Oil’s light hydrocarbon,geochemical characteristics and sources in Xihu Sag,the East China Sea Basin[J].2015,39(5):23-31.
[13] 李上卿,李纯洁.东海西湖凹陷油气资源分布及勘探潜力分析[J].石油实验地质,2003,25(6):721-728. LI Shangqing,LI Chunjie.Analysis on the petroleum resource distribution and exploration potential of the Xihu Depression,the East China Sea[J].Petroleum Geology & Experiment,2003,25(6):721-728.
[14] 叶加仁,顾惠荣,贾健谊.东海西湖凹陷油气地质条件及其勘探潜力[J].海洋地质与第四纪地质,.2008,28(4):111-116. YE Jiaren,GU Huirong,JIA Jianyi.Petroleum geological condition and exploration potential of Xihu Depression,East China Sea[J].Marine Geology & Quaternary Geology,2008,28(4):111-116.
[15] 魏恒飞,陈践发,陈晓东,等.西湖凹陷平湖组滨海型煤系烃源岩发育环境及其控制因素[J].中国地质,2013,40(2):487-497. WEI Hengfei,CHEN Jianfa,CHEN Xiaodong,et al.The controlling factors and sedimentary environment for developing coastal coal-bearing source rock of Pinghu Formation in Xihu Depression[J].Geology in China,2013,40(2):487-497.
[16] 马柯阳.凝析油形成新模式:原油蒸发分馏机制研究[J].地球科学进展,1995,10(6):567-571. MA Keyang.Study on petroleum evaporative fractionation:a new mechanism for the generation of condensate[J].Advance in Earth Sciences,1995,10(6):567-571.
[17] MEULBROEK P,CATHLES III L,WHELAN J.Phase fractionation at South Eugene Island Block 330[J].Organic Geochemistry,1998,29(1/3):223-239.
[18] 黄光辉,李碧,徐阳东,等.塔北地区原油正构烷烃摩尔浓度分布特征及意义[J].石油天然气学报,2010,32(3):13-17. HUANG Guanghui,LI Bi,XU Yangdong,et al.The distributing characteristics of mole concentration of n-alkanes in crude oil in the northern Tarim Basin and its geochemistry meanings[J].Journal of Oil and Gas Technology,2010,32(3):13-17.
[19] 张文俊,张敏.典型海相油和煤成油饱和烃生物标志化合物特征研究[J].石油天然气学报,2012,34(6):25-28. ZHANG Wenjun,ZHANG Min.Biomarker characteristics of saturated hydrocarbon in typical marine oils and typical coal-formed oils[J].Journal of Oil and Gas Technology,2012,34(6):25-28.
[20] 房嬛,孟仟祥,孙敏卓,等.吐哈盆地中下侏罗统源岩和油的生物标志物分布特征:饱和烃馏分[J].沉积学报,2008,26(5):891-895. FANG Xuan,MENG Qianxiang,SUN Minzhuo,et al .Characteristics of biomarkers in saturated hydrocarbon in coal of carbonaceous mudstone and oils from the lower Jurassic coal measures in the Turpan Basin[J].Acta Sedimentologica Sinica,2008,26(5):891-895.
[21] 林壬子.轻烃技术在油气勘探中的应用[M].武汉:中国地质大学出版社,1992:3-4. LIN Renzi.Light hydrocarbons techniques & it’s application in oil & gas exploration[M].Wuhan:China University of Geosciences Press,1992:3-4.
[22] 戴金星.利用轻烃鉴别煤成气和油型气[J].石油勘探与开发,1993,20(5):26-32. DAI Jinxing.Identification of coal formed gas and oil type gas by light hydrocarbons [J].Petroleum Exploration and Development,1993,20(5):26-32.
[23] 曹倩,徐旭辉,曾广东,等.东海盆地西湖凹陷天然气及原油地化特征分析[J].石油实验地质,2015,37(5):627-632. CAO Qian,XU Xuhui,ZENG Guangdong,et al.Geochemical characteristics of natural gases and crude oils in the Xihu Sag of East China Sea Basin[J].Petroleum Geology & Experiment,2015,37(5):627-632.
[24] 许婷,侯读杰,曹冰.东海盆地西湖凹陷凝析油和轻质油生源母质剖析[J].地球化学,2015,44(3):289-300. XU Ting,HOU Dujie,CAO Bing.Study of precursors for condensates and light oils in Xihu Sag of East China Sea Basin[J].Geochimica,2015,44(3):289-300.
[25] 陈智远,徐志星,陈飞,等.异常高压与油气充注的耦合性:以东海陆架盆地西湖凹陷花港组和平湖组为例[J].石油实验地质,2017,39(2):186-194. CHEN Zhiyuan,XU Zhixing,CHEN Fei,et al.Coupling of abnormal overpressure and hydrocarbon charging:a case from the Huagang and Pinghu formations of Xihu Sag,East China Sea Shelf Basin[J].Petroleum Geology & Experiment,2017,39(2):186-194.
[2] 王国纯.东海盆地油气勘探焦点问题探讨[J].中国海上油气(地质),2003,17(1):29-32. WANG Guochun.A discussion on some focal problems of petroleum exploration in East China Sea Basin[J].China Offshore Oil and Gas(Geology),2003,17(1):29-32.
[3] 苏奥,陈红汉,王存武,等.东海盆地西湖凹陷油气成因及成熟度判别[J].石油勘探与开发,2013,40(5):521-527. SU Ao,CHEN Honghan,WANG Cunwu,et al.Genesis and maturity identification of oil and gas in the Xihu Sag,East China Sea Basin[J].Petroleum Exploration and Development[J].2013,40(5):521-527.
[4] 傅宁,李友川,陈桂华,等.东海西湖凹陷油气“蒸发分馏”成藏机制[J].石油勘探与开发,2003,30(2):39-42. FU Ning,LI Youchuan,CHEN Guihua,et al.Pooling mechanisms of “evaporating fractionation” of oil and gas in the Xihu Depression,East China Sea[J].Petroleum Exploration and Development,2003,30(2):39-42.
[5] 朱扬明,周洁,顾圣啸,等.西湖凹陷始新统平湖组煤系烃源岩分子地球化学特征.石油学报,2012,33(1):32-39. ZHU Yangming,ZHOU Jie,Gu Shengxiao,et al.Molecular geochemistry of Eocene Pinghu Formation coal-bearing source rocks in the Xihu Depression,East China Sea Shelf Basin[J].Acta Petrolei Sinica,2012,33(1):32-39.
[6] 贾健谊,须雪豪,孙伯强.东海西湖凹陷原油与天然气的地球化学特征[J].海洋石油,2000,20(2):1-7. JIA Jianyi,XU Xuehao,SUN Boqiang. Oil/gas geochemical character in the Xihu Trough of the East China Sea[J].Offshore Oil,2000,20(2):1-7.
[7] 叶军,郭迪孝.东海西湖凹陷天然气地化特征[J].石油实验地质,1996,18(2):174-181. YE Jun,GUO Dixiao.Geochemical characters of the natural gas in West Lake Depression,the East China Sea[J].Experimental Petroleum Geology,1996,18(2):174-181.
[8] 张银国.东海西湖凹陷花港组油气地质条件与油气分布规律[J].石油实验地质,2010,32(3):223-226. ZHANG Yinguo.Petroleum geology and hydrocarbon distribution pattern of Huagang Formation in the Xihu Sag of the East China Sea[J].Petroleum Geology & Experiment,2010,32(3):223-226.
[9] 秦兰芝,刘金水,李帅,等.东海西湖凹陷中央反转带花港组锆石特征及物源指示意义[J].石油实验地质,2017,39(4):498-504,526. QIN Lanzhi,LIU Jinshui,LI Shuai,et al.Characteristics of zircon in the Huagang Formation of the central inversion zone of Xihu Sag and its provenance indication[J].Petroleum Geology & Experiment,2017,39(4):498-504,526.
[10] 李宁,覃军,江瀚,等.西湖凹陷T气田油气分布特征与主控因素[J].断块油气田,2017,24(3):329-332. LI Ning,QIN Jun,JIANG Han,et al.Hydrocarbon distribution features and its main controlling factors of T gas field,Xihu Sag,East China Sea Shelf Basin[J].Fault-Block Oil and Gas Field,2017,24(3):329-332.
[11] 苏奥,陈红汉,马玉华,等.东海盆地西湖凹陷孔雀亭气区气侵条件及主控因素[J].天然气地球科学,2015,26(2):292-300. SU Ao,CHEN Honghan,MA Yuhua,et al.Geologic conditions and main controlling factors of gas washing in Kongqueting region in Xihu Depression,Eastern Sea Basin[J].Natural Gas Geoscience,2015,26(2):292-300.
[12] 吴江,侯读杰,许汇源,等.东海盆地西湖凹陷原油轻烃地球化学特征及油源区分[J].东北石油大学学报,2015,39(5):23-31. WU Jiang,HOU Dujie,XU Huiyuan,et al.Oil’s light hydrocarbon,geochemical characteristics and sources in Xihu Sag,the East China Sea Basin[J].2015,39(5):23-31.
[13] 李上卿,李纯洁.东海西湖凹陷油气资源分布及勘探潜力分析[J].石油实验地质,2003,25(6):721-728. LI Shangqing,LI Chunjie.Analysis on the petroleum resource distribution and exploration potential of the Xihu Depression,the East China Sea[J].Petroleum Geology & Experiment,2003,25(6):721-728.
[14] 叶加仁,顾惠荣,贾健谊.东海西湖凹陷油气地质条件及其勘探潜力[J].海洋地质与第四纪地质,.2008,28(4):111-116. YE Jiaren,GU Huirong,JIA Jianyi.Petroleum geological condition and exploration potential of Xihu Depression,East China Sea[J].Marine Geology & Quaternary Geology,2008,28(4):111-116.
[15] 魏恒飞,陈践发,陈晓东,等.西湖凹陷平湖组滨海型煤系烃源岩发育环境及其控制因素[J].中国地质,2013,40(2):487-497. WEI Hengfei,CHEN Jianfa,CHEN Xiaodong,et al.The controlling factors and sedimentary environment for developing coastal coal-bearing source rock of Pinghu Formation in Xihu Depression[J].Geology in China,2013,40(2):487-497.
[16] 马柯阳.凝析油形成新模式:原油蒸发分馏机制研究[J].地球科学进展,1995,10(6):567-571. MA Keyang.Study on petroleum evaporative fractionation:a new mechanism for the generation of condensate[J].Advance in Earth Sciences,1995,10(6):567-571.
[17] MEULBROEK P,CATHLES III L,WHELAN J.Phase fractionation at South Eugene Island Block 330[J].Organic Geochemistry,1998,29(1/3):223-239.
[18] 黄光辉,李碧,徐阳东,等.塔北地区原油正构烷烃摩尔浓度分布特征及意义[J].石油天然气学报,2010,32(3):13-17. HUANG Guanghui,LI Bi,XU Yangdong,et al.The distributing characteristics of mole concentration of n-alkanes in crude oil in the northern Tarim Basin and its geochemistry meanings[J].Journal of Oil and Gas Technology,2010,32(3):13-17.
[19] 张文俊,张敏.典型海相油和煤成油饱和烃生物标志化合物特征研究[J].石油天然气学报,2012,34(6):25-28. ZHANG Wenjun,ZHANG Min.Biomarker characteristics of saturated hydrocarbon in typical marine oils and typical coal-formed oils[J].Journal of Oil and Gas Technology,2012,34(6):25-28.
[20] 房嬛,孟仟祥,孙敏卓,等.吐哈盆地中下侏罗统源岩和油的生物标志物分布特征:饱和烃馏分[J].沉积学报,2008,26(5):891-895. FANG Xuan,MENG Qianxiang,SUN Minzhuo,et al .Characteristics of biomarkers in saturated hydrocarbon in coal of carbonaceous mudstone and oils from the lower Jurassic coal measures in the Turpan Basin[J].Acta Sedimentologica Sinica,2008,26(5):891-895.
[21] 林壬子.轻烃技术在油气勘探中的应用[M].武汉:中国地质大学出版社,1992:3-4. LIN Renzi.Light hydrocarbons techniques & it’s application in oil & gas exploration[M].Wuhan:China University of Geosciences Press,1992:3-4.
[22] 戴金星.利用轻烃鉴别煤成气和油型气[J].石油勘探与开发,1993,20(5):26-32. DAI Jinxing.Identification of coal formed gas and oil type gas by light hydrocarbons [J].Petroleum Exploration and Development,1993,20(5):26-32.
[23] 曹倩,徐旭辉,曾广东,等.东海盆地西湖凹陷天然气及原油地化特征分析[J].石油实验地质,2015,37(5):627-632. CAO Qian,XU Xuhui,ZENG Guangdong,et al.Geochemical characteristics of natural gases and crude oils in the Xihu Sag of East China Sea Basin[J].Petroleum Geology & Experiment,2015,37(5):627-632.
[24] 许婷,侯读杰,曹冰.东海盆地西湖凹陷凝析油和轻质油生源母质剖析[J].地球化学,2015,44(3):289-300. XU Ting,HOU Dujie,CAO Bing.Study of precursors for condensates and light oils in Xihu Sag of East China Sea Basin[J].Geochimica,2015,44(3):289-300.
[25] 陈智远,徐志星,陈飞,等.异常高压与油气充注的耦合性:以东海陆架盆地西湖凹陷花港组和平湖组为例[J].石油实验地质,2017,39(2):186-194. CHEN Zhiyuan,XU Zhixing,CHEN Fei,et al.Coupling of abnormal overpressure and hydrocarbon charging:a case from the Huagang and Pinghu formations of Xihu Sag,East China Sea Shelf Basin[J].Petroleum Geology & Experiment,2017,39(2):186-194.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |