东濮凹陷煤成气成藏主控因素定量分析
|
摘要
基于东濮凹陷典型煤成气区成藏条件对比分析,厘定煤成气成藏关键控制因素,结合权重赋值法、模糊评价法,提出断层输导效率系数、保存条件系数等参数,对单一因素进行定量化表征,最终利用多元线性回归法等建立东濮凹陷煤成气藏形成规模的多因素预测模型,并优选勘探潜力区。研究表明:煤成气的宏观展布受源岩生烃能力控制,主要围绕生气强度大于20×10~8 m~3/km~2的区域分布;通源断层活动期与烃源岩生排烃期的时空配置关系决定煤成气有效运聚;煤成气藏保存条件受断-盖组合关系控制,泥岩盖层有效厚度封闭下限为40 m;充足的源-储剩余压差是煤成气高效成藏的必要条件;煤成气藏形成规模受"供烃-动力-输导-保存"多元耦合控制,其中生气供给、封盖保存为首要控制因素,成藏动力条件和断层输导条件次之;基于成藏条件分析及气藏规模定量预测评价结果,优选中央隆起带文中地区、西南洼方里集地区为重点潜力区。
Based on exploration results and previous studies, the differences in the coal-formed gas accumulation conditions among different coal-formed gas areas of Dongpu Depression were compared, and the main controlling factors of coal-formed gas accumulation were determined. The coefficients of fault transport efficiency and preservation condition coefficients were proposed quantitatively in this paper. The quantitative analysis of controlling factors for the scale of coal-formed gas reservoirs were carried out based on weights assignment method, fuzzy evaluation method and multiple linear regression method, and a quantitative prediction model for the enrichment scale of coal-formed gas reservoirs in Dongpu Depression was established based on multiple factors. Finally, the exploration potential areas were optimized. The results show that the macro distribution of coal-formed gas in the study area is controlled by the hydrocarbon generation capacity, and all the coal-formed gas reservoirs are distributed around the area where the gas generation intensity is greater than 20×10~8 m~3/km~2. The relationship between the fault activity and the hydrocarbon generation period of gas source rocks controls the effectivity of gas migration. The combination between fault and cap rocks controls the vertical enrichment of natural gas, and the coal-formed gas is distributed in the stratigraphic level which the faulted thickness of cap rock is more than 40 m. Sufficient residual pressure D-value between source and reservoir is a necessary condition for efficient coal-formed gas accumulation. The enrichment degree of coal-formed gas reservoirs is multi-controlled by "gas supply-dynamics-transportation-preservation" conditions, among which, the gas supply and preservation condition are the main controlling factors, while the dynamic and transportation conditions are less important. Combining results from quantitative forecasting model, it is concluded that the central uplift zone and the southwestern depression are the key potential areas.
Based on exploration results and previous studies, the differences in the coal-formed gas accumulation conditions among different coal-formed gas areas of Dongpu Depression were compared, and the main controlling factors of coal-formed gas accumulation were determined. The coefficients of fault transport efficiency and preservation condition coefficients were proposed quantitatively in this paper. The quantitative analysis of controlling factors for the scale of coal-formed gas reservoirs were carried out based on weights assignment method, fuzzy evaluation method and multiple linear regression method, and a quantitative prediction model for the enrichment scale of coal-formed gas reservoirs in Dongpu Depression was established based on multiple factors. Finally, the exploration potential areas were optimized. The results show that the macro distribution of coal-formed gas in the study area is controlled by the hydrocarbon generation capacity, and all the coal-formed gas reservoirs are distributed around the area where the gas generation intensity is greater than 20×10~8 m~3/km~2. The relationship between the fault activity and the hydrocarbon generation period of gas source rocks controls the effectivity of gas migration. The combination between fault and cap rocks controls the vertical enrichment of natural gas, and the coal-formed gas is distributed in the stratigraphic level which the faulted thickness of cap rock is more than 40 m. Sufficient residual pressure D-value between source and reservoir is a necessary condition for efficient coal-formed gas accumulation. The enrichment degree of coal-formed gas reservoirs is multi-controlled by "gas supply-dynamics-transportation-preservation" conditions, among which, the gas supply and preservation condition are the main controlling factors, while the dynamic and transportation conditions are less important. Combining results from quantitative forecasting model, it is concluded that the central uplift zone and the southwestern depression are the key potential areas.
引文
[1] 朱家蔚,强启厚,许化政.东濮凹陷天然气类型及形成条件[J].天然气工业,1984,4(1):8-14.ZHU Jiawei,QIANG Qihou,XU Huazheng.Kinds and formation conditions of natural gas in Dongpu Depression[J].Natural Gas Industry,1984,4(1):8-14.
[2] 申建中,季美英,朱家蔚,等.东濮凹陷煤成气氩同位素地球化学特征及气源对比[J].沉积学报,1988,6(3):118-129.SHEN Jianzhong,JI Meiying,ZHU Jiawei,et al.Geochemical characteristics of argon isotopes of coal-formed gases from Dongpu Depression and their source comparison[J].Acta Sedimentologica Sinica,1988,6(3):118-129.
[3] 蒋晓蓉,罗小平,郑尚乾.东濮凹陷天然气生成模拟与煤成气的新证据[J].矿物岩石,2005,25(2):110-113.JIANG Xiaorong,LUO Xiaoping,ZHENG Shangqian.New evidence for the formation simulation of natural gas and coal-type gas in the Dongpu Sag[J].Journal of Mineralogy & Petrology,2005,25(2):110-113.
[4] 朱炎铭,王晓辉,张聪,等.东濮凹陷石炭—二叠系煤系烃源岩的生烃演化[J].石油学报,2007,28(6):27-31.ZHU Yanming,WANG Xiaohui,ZHANG Cong,et al.Hydrocarbon-generation evolution of the Permo-Carboniferous coal measure in Dongpu Depression[J].Acta Petrolei Sinica,2007,28(6):27-31.
[5] 苏惠,曲丽萍,张金川,等.渤海湾盆地东濮凹陷天然气成藏条件与富集规律[J].石油实验地质,2006,28(2):123-128.SU Hui,QU Liping,ZHANG Jinchuan,et al.The reservoir-forming condition and enrichment rule of the natural gas in the Dongpu Depression,the Bohaiwan Basin[J].Petroleum Geology & Experiment,2006,28(2):123-128.
[6] 李继东,许书堂,杨玉娥,等.东濮凹陷胡古2气藏成藏条件分析[J].断块油气田,2015,22(4):450-453.LI Jidong,XU Shutang,YANG Yu'e,et al.Forming condition analysis of Hugu 2 gas reservoir in Dongpu Depression[J].Fault-Block Oil and Gas Field,2015,22(4):450-453.
[7] 国殿斌,向才富,蒋飞虎,等.东濮凹陷西南洼断层的油气输导作用与机理探讨[J].断块油气田,2017,24(2):159-164.GUO Dianbin,XIANG Caifu,JIANG Feihu,et al.Mechanism of hydrocarbon migration and accumulation in southwest sag of Dongpu Depression[J].Fault-Block Oil and Gas Field,2017,24(2):159-164.
[8] 焦大庆,王德仁,武晓玲.东濮凹陷天然气成藏及富集规律[J].石油与天然气地质,2006,27(6):794-803.JIAO Daqing,WANG Deren,WU Xiaoling.Patterns of natural gas accumulation and enrichment in Dongpu depression[J].Oil & Gas Geology,2006,27(6):794-803.
[9] 蒋有录,李宗亮,谈玉明,等.断陷盆地天然气运聚成藏史研究:以东濮凹陷文23气田为例[J].石油学报,2008,29(5):633-638.JIANG Youlu,LI Zongliang,TAN Yuming,et al.Research on history of gas migration and accumulation in fault basin:taking wen 23 gas field of Dongpu Depression as an example[J].Acta Petrolei Sinica,2008,29(5):633-638.
[10] 李宗亮,蒋有录,鲁雪松.东濮凹陷户部寨气田天然气成藏地球化学特征[J].西南石油大学学报(自然科学版),2008,30(2):57-60.LI Zongliang,JIANG Youlu,LU Xuesong.Geochemical characteristics of gas accumulation in hubuzhai gas field,Dongpu Depression[J].Journal of Southwest Petroleum University (Science & Technology Edition),2008,30(2):57-60.
[11] 崔军平,任战利,钟高润.东濮凹陷白庙地区深层天然气成藏期次研究[J].沉积学报,2012,30(4):779-786.CUI Junping,REN Zhanli,ZHONG Gaorun.Research on the forming stages of deep natural gas reservoirs in Baimiao Area of Dongpu Depression[J].Acta Sedimentologica Sinica,2012,30(4):779-786.
[12] 贾存善,饶丹.东濮凹陷马厂构造深层混源气藏气源探讨[J].油气地质与采收率,2007,14(1):32-35.JIA Cunshan,RAO Dan.Discussion on origin of deep mixed natural gas reservoirs of Machang structure,Dongpu Depression[J].Petroleum Geology & Recovery Efficiency,2007,14(1):32-35.
[13] 陈书平,漆家福,王德仁,等.东濮凹陷断裂系统及变换构造[J].石油学报,2007,28(1):43-49.CHEN Shuping,QI Jiafu,WANG Deren,et al.Fault systems and transfer structures in Dongpu Sag[J].Acta Petrolei Sinica,2007,28(1):43-49.
[14] 卢双舫,王朋岩,付广,等.从天然气富集的主控因素剖析我国主要含气盆地天然气的勘探前景[J].石油学报,2003,24(3):34-37.LU Shuangfang,WANG Pengyan,FU Guang,et al.Exploration potential analysis of natural gas in the main gas-bearing basins based on factors controlling natural gas enrichment[J].Acta Petrolei Sinica,2003,24(3):34-37.
[15] 柳广弟,李剑,李景明,等.天然气成藏过程有效性的主控因素与评价方法[J].天然气地球科学,2005,16(1):1-6.LIU Guangdi,LI Jian,LI Jingming,et al.The controls and the assessment method for the effectiveness of natural gas migration and accumulation process[J].Natural Gas Geoscience,2005,16(1):1-6.
[16] 蒋有录,刘培,宋国奇,等.渤海湾盆地新生代晚期断层活动与新近系油气富集关系[J].石油与天然气地质,2015,36(4):525-533.JIANG Youlu,LIU Pei,SONG Guoqi,et al.Late Cenozoic faulting activities and their influence upon hydrocarbon accumulations in the Neogene in Bohai Bay Basin[J].Oil & Gas Geology,2015,36(4):525-533.
[17] 孙波,张善文,王永诗.断层输导能力定量评价及其在油气勘探中的应用:以济阳坳陷青西地区为例[J].油气地质与采收率,2013,20(6):10-14.SUN Bo,ZHANG Shanwen,WANG Yongshi.Quantitative evaluation of fault transporting capacity and its application in hydrocarbon exploration:case study of west Qingtuozi uplift of Jiyang Depression[J].Petroleum Geology and Recovery Efficiency,2013,20(6):10-14.
[18] 蒋有录.渤海湾盆地盖层对天然气富集的影响初探[J].地质论评,1999,45(1):26-31.JIANG Youlu.The influence of cap rocks on the accumulation and distribution of natural gas in the Bohai Bay Basin[J].Geological Review,1999,45(1):26-31.
[19] 刘景东,蒋有录,谈玉明,等.渤海湾盆地东濮凹陷膏盐岩与油气的关系[J].沉积学报,2014,32(1):126-137.LIU Jingdong,JIANG Youlu,TAN Yuming,et al.Relationship between gypsum-salt rock and oil-gas in Dongpu Depression of Bohai Gulf Basin[J].Acta Sedimentologica Sinica,2014,32(1):126-137.
[20] 付广,王浩然,胡欣蕾.断裂带盖层油气封盖断接厚度下限的预测方法及其应用[J].中国石油大学学报(自然科学版),2015,39(3):30-37.FU Guang,WANG Haoran,HU Xinlei.Prediction method and application of cap rock faulted-cantact thickness lower limit for oil-gas sealing in fault zone[J].Journal of China University of Petroleum(Edition of Natural Science),2015,39(3):30-37.
[21] 邓祖佑,王少昌,姜正龙,等.天然气封盖层的突破压力[J].石油与天然气地质,2000,21(2):136-138.DENG Zuyou,WANG Shaochang,JIANG Zhenglong,et al.Breaking pressure of gas cap rocks[J].Oil & Gas Geology,2000,21(2):136-138.
[22] 卓勤功,赵孟军,李勇,等.膏盐岩盖层封闭性动态演化特征与油气成藏:以库车前陆盆地冲断带为例[J].石油学报,2014,35(5):847-856.ZHUO Qingong,ZHAO Mengjun,LI Yong,et al.Dynamic sealing evolution and hydrocarbon accumulation of evaporite cap rocks:an example from Kuqa foreland basin thrust belt[J].Acta Petrolei Sinica,2014,35(5):847-856.
[23] 孙明亮,柳广弟,李剑.气藏的盖层特征及划分标准[J].天然气工业,2008,28(8):36-38.SUN Mingliang,LIU Guangdi,LI Jian.Features of cap rocks of gas pools and criteria of identification[J].Natural Gas Industry,2008,28(8):36-38.
[24] 国殿斌,万涛,李继东,等.东濮凹陷方里集构造带油气来源及成藏期[J].地球科学与环境学报,2017,39(4):530-538.GUO Dianbin,WAN Tao,LI Jidong,et al.Hydrocarbon sources and reservoir forming stages in Fangliji tectonic belt of Dongpu Depression,China[J].Journal of Earth Sciences and Environment,2017,39(4):530-538.
[25] 蒋有录,胡洪瑾,谈玉明,等.东濮凹陷北部地区古近系油型气成因类型及分布特征[J].中国石油大学学报(自然科学版),2017,41(3):42-48.JIANG Youlu,HU Hongjin,TAN Yuming,et al.Genesis and distribution of Paleogene oil type gases in the northern Dongpu Depression[J].Journal of China University of Petroleum(Edition of Natural Science),2017,41(3):42-48.
[26] 彭君,冯阵东,国殿斌,等.再论东濮凹陷沙三段成盐模式[J].中国石油大学学报(自然科学版),2016,40(3):9-15.PENG Jun,FENG Zhendong,GUO Dianbin,et al.Revisiting salt-forming models in the third member of Shahejie Formation in Dongpu Depression[J].Journal of China University of Petroleum(Edition of Natural Science),2016,40(3):9-15.
[2] 申建中,季美英,朱家蔚,等.东濮凹陷煤成气氩同位素地球化学特征及气源对比[J].沉积学报,1988,6(3):118-129.SHEN Jianzhong,JI Meiying,ZHU Jiawei,et al.Geochemical characteristics of argon isotopes of coal-formed gases from Dongpu Depression and their source comparison[J].Acta Sedimentologica Sinica,1988,6(3):118-129.
[3] 蒋晓蓉,罗小平,郑尚乾.东濮凹陷天然气生成模拟与煤成气的新证据[J].矿物岩石,2005,25(2):110-113.JIANG Xiaorong,LUO Xiaoping,ZHENG Shangqian.New evidence for the formation simulation of natural gas and coal-type gas in the Dongpu Sag[J].Journal of Mineralogy & Petrology,2005,25(2):110-113.
[4] 朱炎铭,王晓辉,张聪,等.东濮凹陷石炭—二叠系煤系烃源岩的生烃演化[J].石油学报,2007,28(6):27-31.ZHU Yanming,WANG Xiaohui,ZHANG Cong,et al.Hydrocarbon-generation evolution of the Permo-Carboniferous coal measure in Dongpu Depression[J].Acta Petrolei Sinica,2007,28(6):27-31.
[5] 苏惠,曲丽萍,张金川,等.渤海湾盆地东濮凹陷天然气成藏条件与富集规律[J].石油实验地质,2006,28(2):123-128.SU Hui,QU Liping,ZHANG Jinchuan,et al.The reservoir-forming condition and enrichment rule of the natural gas in the Dongpu Depression,the Bohaiwan Basin[J].Petroleum Geology & Experiment,2006,28(2):123-128.
[6] 李继东,许书堂,杨玉娥,等.东濮凹陷胡古2气藏成藏条件分析[J].断块油气田,2015,22(4):450-453.LI Jidong,XU Shutang,YANG Yu'e,et al.Forming condition analysis of Hugu 2 gas reservoir in Dongpu Depression[J].Fault-Block Oil and Gas Field,2015,22(4):450-453.
[7] 国殿斌,向才富,蒋飞虎,等.东濮凹陷西南洼断层的油气输导作用与机理探讨[J].断块油气田,2017,24(2):159-164.GUO Dianbin,XIANG Caifu,JIANG Feihu,et al.Mechanism of hydrocarbon migration and accumulation in southwest sag of Dongpu Depression[J].Fault-Block Oil and Gas Field,2017,24(2):159-164.
[8] 焦大庆,王德仁,武晓玲.东濮凹陷天然气成藏及富集规律[J].石油与天然气地质,2006,27(6):794-803.JIAO Daqing,WANG Deren,WU Xiaoling.Patterns of natural gas accumulation and enrichment in Dongpu depression[J].Oil & Gas Geology,2006,27(6):794-803.
[9] 蒋有录,李宗亮,谈玉明,等.断陷盆地天然气运聚成藏史研究:以东濮凹陷文23气田为例[J].石油学报,2008,29(5):633-638.JIANG Youlu,LI Zongliang,TAN Yuming,et al.Research on history of gas migration and accumulation in fault basin:taking wen 23 gas field of Dongpu Depression as an example[J].Acta Petrolei Sinica,2008,29(5):633-638.
[10] 李宗亮,蒋有录,鲁雪松.东濮凹陷户部寨气田天然气成藏地球化学特征[J].西南石油大学学报(自然科学版),2008,30(2):57-60.LI Zongliang,JIANG Youlu,LU Xuesong.Geochemical characteristics of gas accumulation in hubuzhai gas field,Dongpu Depression[J].Journal of Southwest Petroleum University (Science & Technology Edition),2008,30(2):57-60.
[11] 崔军平,任战利,钟高润.东濮凹陷白庙地区深层天然气成藏期次研究[J].沉积学报,2012,30(4):779-786.CUI Junping,REN Zhanli,ZHONG Gaorun.Research on the forming stages of deep natural gas reservoirs in Baimiao Area of Dongpu Depression[J].Acta Sedimentologica Sinica,2012,30(4):779-786.
[12] 贾存善,饶丹.东濮凹陷马厂构造深层混源气藏气源探讨[J].油气地质与采收率,2007,14(1):32-35.JIA Cunshan,RAO Dan.Discussion on origin of deep mixed natural gas reservoirs of Machang structure,Dongpu Depression[J].Petroleum Geology & Recovery Efficiency,2007,14(1):32-35.
[13] 陈书平,漆家福,王德仁,等.东濮凹陷断裂系统及变换构造[J].石油学报,2007,28(1):43-49.CHEN Shuping,QI Jiafu,WANG Deren,et al.Fault systems and transfer structures in Dongpu Sag[J].Acta Petrolei Sinica,2007,28(1):43-49.
[14] 卢双舫,王朋岩,付广,等.从天然气富集的主控因素剖析我国主要含气盆地天然气的勘探前景[J].石油学报,2003,24(3):34-37.LU Shuangfang,WANG Pengyan,FU Guang,et al.Exploration potential analysis of natural gas in the main gas-bearing basins based on factors controlling natural gas enrichment[J].Acta Petrolei Sinica,2003,24(3):34-37.
[15] 柳广弟,李剑,李景明,等.天然气成藏过程有效性的主控因素与评价方法[J].天然气地球科学,2005,16(1):1-6.LIU Guangdi,LI Jian,LI Jingming,et al.The controls and the assessment method for the effectiveness of natural gas migration and accumulation process[J].Natural Gas Geoscience,2005,16(1):1-6.
[16] 蒋有录,刘培,宋国奇,等.渤海湾盆地新生代晚期断层活动与新近系油气富集关系[J].石油与天然气地质,2015,36(4):525-533.JIANG Youlu,LIU Pei,SONG Guoqi,et al.Late Cenozoic faulting activities and their influence upon hydrocarbon accumulations in the Neogene in Bohai Bay Basin[J].Oil & Gas Geology,2015,36(4):525-533.
[17] 孙波,张善文,王永诗.断层输导能力定量评价及其在油气勘探中的应用:以济阳坳陷青西地区为例[J].油气地质与采收率,2013,20(6):10-14.SUN Bo,ZHANG Shanwen,WANG Yongshi.Quantitative evaluation of fault transporting capacity and its application in hydrocarbon exploration:case study of west Qingtuozi uplift of Jiyang Depression[J].Petroleum Geology and Recovery Efficiency,2013,20(6):10-14.
[18] 蒋有录.渤海湾盆地盖层对天然气富集的影响初探[J].地质论评,1999,45(1):26-31.JIANG Youlu.The influence of cap rocks on the accumulation and distribution of natural gas in the Bohai Bay Basin[J].Geological Review,1999,45(1):26-31.
[19] 刘景东,蒋有录,谈玉明,等.渤海湾盆地东濮凹陷膏盐岩与油气的关系[J].沉积学报,2014,32(1):126-137.LIU Jingdong,JIANG Youlu,TAN Yuming,et al.Relationship between gypsum-salt rock and oil-gas in Dongpu Depression of Bohai Gulf Basin[J].Acta Sedimentologica Sinica,2014,32(1):126-137.
[20] 付广,王浩然,胡欣蕾.断裂带盖层油气封盖断接厚度下限的预测方法及其应用[J].中国石油大学学报(自然科学版),2015,39(3):30-37.FU Guang,WANG Haoran,HU Xinlei.Prediction method and application of cap rock faulted-cantact thickness lower limit for oil-gas sealing in fault zone[J].Journal of China University of Petroleum(Edition of Natural Science),2015,39(3):30-37.
[21] 邓祖佑,王少昌,姜正龙,等.天然气封盖层的突破压力[J].石油与天然气地质,2000,21(2):136-138.DENG Zuyou,WANG Shaochang,JIANG Zhenglong,et al.Breaking pressure of gas cap rocks[J].Oil & Gas Geology,2000,21(2):136-138.
[22] 卓勤功,赵孟军,李勇,等.膏盐岩盖层封闭性动态演化特征与油气成藏:以库车前陆盆地冲断带为例[J].石油学报,2014,35(5):847-856.ZHUO Qingong,ZHAO Mengjun,LI Yong,et al.Dynamic sealing evolution and hydrocarbon accumulation of evaporite cap rocks:an example from Kuqa foreland basin thrust belt[J].Acta Petrolei Sinica,2014,35(5):847-856.
[23] 孙明亮,柳广弟,李剑.气藏的盖层特征及划分标准[J].天然气工业,2008,28(8):36-38.SUN Mingliang,LIU Guangdi,LI Jian.Features of cap rocks of gas pools and criteria of identification[J].Natural Gas Industry,2008,28(8):36-38.
[24] 国殿斌,万涛,李继东,等.东濮凹陷方里集构造带油气来源及成藏期[J].地球科学与环境学报,2017,39(4):530-538.GUO Dianbin,WAN Tao,LI Jidong,et al.Hydrocarbon sources and reservoir forming stages in Fangliji tectonic belt of Dongpu Depression,China[J].Journal of Earth Sciences and Environment,2017,39(4):530-538.
[25] 蒋有录,胡洪瑾,谈玉明,等.东濮凹陷北部地区古近系油型气成因类型及分布特征[J].中国石油大学学报(自然科学版),2017,41(3):42-48.JIANG Youlu,HU Hongjin,TAN Yuming,et al.Genesis and distribution of Paleogene oil type gases in the northern Dongpu Depression[J].Journal of China University of Petroleum(Edition of Natural Science),2017,41(3):42-48.
[26] 彭君,冯阵东,国殿斌,等.再论东濮凹陷沙三段成盐模式[J].中国石油大学学报(自然科学版),2016,40(3):9-15.PENG Jun,FENG Zhendong,GUO Dianbin,et al.Revisiting salt-forming models in the third member of Shahejie Formation in Dongpu Depression[J].Journal of China University of Petroleum(Edition of Natural Science),2016,40(3):9-15.
© 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 |