惠民凹陷煤系烃源岩评价及潜力分析
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摘要
采用常规静态实验和动力学模拟方法,判识惠民凹陷石炭—二叠统煤系烃源岩有机质类型,评价煤系烃源岩生气能力,建立煤岩生烃动力学参数,动态模拟生气过程。研究认为,惠民凹陷石炭—二叠纪煤系烃源岩属于中—好烃源岩,生烃潜力巨大,具有煤气成藏的物质基础,主要经历早三叠期和侏罗—白垩系二次生气高峰期,新生界沉积后基本没有生烃发生;煤成气藏未来的勘探重点在曲堤潜山构造带的东北部构造高点部分和局部高点部位、王判镇潜山带小而丰的甜点型气藏、济阳地堑东部的白桥断层遮挡的断块圈闭和西南缓坡带的靠近曲堤地堑一侧的部位。
The types of the organic matter in Carboniferous-Permian coal measures source rocks in Huimin sag were identified and its hydrocarbon generation potential was evaluated by conventional static experiment and dynamic simulation. It is held that the Carboniferous-Permian hydrocarbon source rocks in Huimin Sag belong to medium-good source rock,they have the material basis for coal gas accumulation,and have great hydrocarbon generation potential. Their hydrocarbon generation peaks are in early Jurassic period and Jurassic-Cretaceous period,but there is basically no hydrocarbon generation after the Cenozoic. The future focus of coal gas exploration should be placed on the tectonic high point part and local high point parts in the northeast of Qudi buried-hill tectonic belt,the small and plentiful desserts in Wangpanzhen buried-hill tectonic belt,the fault block trap sheltered by Baiqiao fault in the east of Jiyang graben,and the Qudi graben side of the southwest gentle slope.
The types of the organic matter in Carboniferous-Permian coal measures source rocks in Huimin sag were identified and its hydrocarbon generation potential was evaluated by conventional static experiment and dynamic simulation. It is held that the Carboniferous-Permian hydrocarbon source rocks in Huimin Sag belong to medium-good source rock,they have the material basis for coal gas accumulation,and have great hydrocarbon generation potential. Their hydrocarbon generation peaks are in early Jurassic period and Jurassic-Cretaceous period,but there is basically no hydrocarbon generation after the Cenozoic. The future focus of coal gas exploration should be placed on the tectonic high point part and local high point parts in the northeast of Qudi buried-hill tectonic belt,the small and plentiful desserts in Wangpanzhen buried-hill tectonic belt,the fault block trap sheltered by Baiqiao fault in the east of Jiyang graben,and the Qudi graben side of the southwest gentle slope.
引文
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[14]封东晓,李趁义,雷利庆.惠民凹陷南坡中生界地质特征与油气勘探思路[J].中国矿业,2015,24(4):69-72.FENG Dongxiao,LI Chenyi,LEI Liqing.Geological characteristics and hydrocarbon exploration strategy of Mesozoic,southern slope of Huimin Sag[J].China Mining Magazine,2015,24(4):69-72.
[2]赵庆波,孔祥文,赵奇.煤层气成藏条件及开采特征[J].石油与天然气地质,2012,33(4):552-556.ZHAO Qingbo,KONG Xiangwen,ZHAO Qi.Coalbed methane accumulation conditions and production characteristics[J].Oil&Gas Geology,2012,33(4):552-556.
[3]吴小奇,廖凤蓉,黄士鹏.塔里木盆地煤成气勘探潜力分析[J].天然气地球科学,2011,22(6):875-879.WU Xiaoqi,LIAO Fengrong,HUANG Shipeng.Exploration potential of coal-derived gas in Tarim Basin[J].Natural Gas Geoscience,2011,22(6):875-879.
[4]李启涛,陈庆春.惠民凹陷南坡煤成气勘探前景分析[J].石油天然气学报,2012,34(7):27-31.LI Qitao,CHEN Qingchun.Exploration prospects of coalformed gas in the south slope of Huimin Depression[J].Journal of Oil and Gas Technology,2012,34(7):27-31.
[5]刘丹,吴伟,房忱琛,等.渤海湾盆地古近系低熟煤成气地球化学特征[J].天然气地球科学,2016,27(5):873-879.LIU Dan,WU Wei,FANG Chenchen,et al.Geochemistry of low-mature gas derived from Paleogene coal-measure source rock of Bohai Bay Basin[J].Natural Gas Geoscience,2016,27(5):873-879.
[6]陈庆春,陈永红,王秀鹏.惠民凹陷南坡煤型气有效供气中心分析[J].高校地质学报,2012,8(4):321-327.CHEN Qingchun,CHEN Yonghong,WANG Xiupeng.Analysis on effective coal type gas supply centre in Huimin depression[J].Geological Journal of China Universities,2012,8(4):321-327.
[7]邬立言,顾信章.热解技术在我国生油岩研究中的应用[J].石油学报,1986,7(2):13-19.WU Liyan,GU Xinzhang.Application of pyrolysis technology in the study of source rocks in China[J].Journal of the Petroleum Society,1986,7(2):13-19.
[8]TISSOT B P,PELET R,UNGERER P.Thermal history of sedimentary basins,maturation indices,and kinetics of oil and gas generation[J].AAPG Bull,1987,71(12):1445-1466.
[9]饶松,胡圣标,汪集旸.有机质生烃动力学参数研究进展:回顾和展望[J].地球物理学进展,2010,25(4):1424-1429.RAO Song,HU Shengbiao,WANG Jiyang.Hydrocarbon generation kinetic parameters of organic matter:review and outlook[J].Progress in Geophysics,2010,25(4):1424-1429.
[10]徐立恒,陈践发,薛海涛,等.应用生烃动力学法定量评价碳酸盐岩的二次生烃:以朱家墩气藏为例[J].地球化学,2008,37(3):251-257.XU Liheng,CHEN Jianfa,XUE Haitao,et al.Quantitative evaluation of secondary hydrocarbon generation of carbonate source rocks using chemical kinetics method of hydrocarbon generation:a case study of the Zhujiadun reservoir[J].Geochimica,2008,37(3):251-257.
[11]颜永何,邹艳荣,屈振亚,等.准噶尔盆地陆东-五彩湾石炭系烃源岩特征及生烃动力学研究[J].地球化学,2014,43(5):502-509.YAN Yonghe,ZOU Yanrong,QU Zhenya,et al.Characteristics of Carboniferous source rocks and their hydrocarbon generation dynamics in the east continental bay,Junggar Basin[J].Geochimica,2014,43(5):502-509.
[12]徐立恒,卢双舫,陈践发,等.徐家围子断陷深层烃源岩生气评价[J].石油学报,2008,29(6):846-852.XU Liheng,LU Shuangfang,CHEN Jianfa,et al.Evaluation of deep seated hydrocarbon source rocks in Xujiaweizi fault depression[J].Journal of Petroleum,2008,29(6):846-852.
[13]刘超英,闫相宾,徐旭辉,等.应用流体包裹体研究惠民凹陷南斜坡油气充注史[J].石油天然气学报,2008,29(4):507-510.LIU Chaoying,YAN Xiangbin,XU Xuhui,et al.Application of fluid inclusion to the study of hydrocarbon charge history of the south slope in the Huimin Sag[J].Oil&Gas Geology,2008,29(4):507-510.
[14]封东晓,李趁义,雷利庆.惠民凹陷南坡中生界地质特征与油气勘探思路[J].中国矿业,2015,24(4):69-72.FENG Dongxiao,LI Chenyi,LEI Liqing.Geological characteristics and hydrocarbon exploration strategy of Mesozoic,southern slope of Huimin Sag[J].China Mining Magazine,2015,24(4):69-72.