EFFECT OF IGNEOUS ROCKS ON SOURCE ROCKS AND HYDROCARBON GENERATION IN THE LANGGU SAG, CENTRAL HEBEI PROVINCE
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摘要: 对冀中廊固凹陷火成岩侵入段烃源岩有机地球化学分析数据进行研究可知,火成岩侵入对镜质体反射率、H/C原子比等影响明显,而对烃比值、氢指数等影响不大,同时并未造成有机质过度熟化,而只是使生油高峰和湿气带上限提前.可见,火成岩侵入并非只是对烃源岩和先存油气藏起破坏作用,其短期的烘烤作用会使有机质的成熟度迅速增加,从而相比正常演化阶段要有所提前,尤其对未熟-低熟阶段烃源岩,可加速其熟化.而且火成岩多层侵入可增大生烃阶段烃源岩的厚度,更有利于油气生成.Abstract: Organic geochemical data analysis is conducted on source rocks in intrusive igneous rock interval in the Langgu Sag,Central Hebei Province.The results indicate that intrusion of igneous rocks has distinct effect on Ro and H/C atomic ratio and less effect on HC/TOC and IH,and it only shifts the oil generation peak and upper limit of wet gas belt to an earlier time instead of inducing overmaturation of organic matters.In this way,intrusion of igneous rocks does not damage source rocks or existing oil and gas reservoirs,but increases maturity of organic matters fast by means of short-term baking,and especially for those source rocks at immature-low maturity stage.Therefore,it is ahead of normal evolution stage.In addition,multiple intrusions of igneous rocks can thicken source rocks of hydrocarbon generation stage,which is more favorable for hydrocarbon generation.
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Key words:
- igneous rocks /
- source rocks /
- hydrocarbon generation /
- baking /
- the Langgu Sag /
- the Bohai Bay Basin
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[1] 周立宏,吴永平,肖敦清等.黄骅坳陷第三系火成岩与油气关系探讨[J].石油学报,2000,21(6):29~34 [2] 李荣西.有机质热演化与低级变质作用[J].地质科技情报,1996,15(3):64~66 [3] 段智斌.火成岩油气藏来源及火山活动对油气影响的探讨[J].石油技术,1990,3(1):9~12 [4] Galushkin Y I.Thermal effects of igneous intrusions on maturity of organic matter:A possible mechanism of intrusion[J].Org Geochemistry,1997,26(1l~12):645~658 [5] 曾广策,王万正,郑和荣等.东营凹陷新生代火山岩及其与盆地演化、油藏的关系[J].地球科学,1997,22(2):157~163 [6] 金强.裂谷盆地火山活动与油气藏的形成[J].石油大学学报(自然科学版),2001,25(1):27~33 [7] 万从礼,翟庆龙,金强.生油岩与火成岩的相互作用研究初探[J].地质地球化学,2001,29(2):46~51 [8] 万从礼,金强,范保军.火山矿物对烃源岩生烃演化作用的研究现状[J].油气地质与采收率,2001,8(4):15~17,20 [9] Mango F D.Transition metal catalysis in the generation of petroleum and natural gas[J].Geochim Cosmochim Acta,1992,56:553~555 [10] Mango F D,Hightower J W,Alan T James.Role of transition-metal catalysis in the generation of natural gas[J].Nature,1994,368(7):536~538 [11] Mango F D.Transition metal catalysis in the generation of natural gas [J].Geochim Cosmochim Acta,1996,24(10/11):977~984 [12] 宋荣彩,周文,董树义等.渤海湾盆地廊固凹陷油气分布特征研究[J].石油实验地质,2008,30(1):64~68 [13] 梁宏斌,张舒亭,李清等.冀中廊固凹陷火成岩成藏条件研究[J].特种油气藏,2003,10(1):82~85 [14] 李维华,刘明生,曾宪云等.冀中廊固凹陷板岩油气藏勘探实践与认识[J].中国石油勘探,2001,6(2):20~22 [15] 谭俊敏,孙志信.火成岩侵入形成的构造物理模拟实验及实例[J].石油实验地质,2007,29(3):324~328 [16] 杨贵丽,蒋有录,吕希学.济阳坳陷火成岩油气藏成藏特征分析[J].油气地质与采收率,2005,12(1):23~30,87 [17] 金强.裂谷盆地生油层中火山岩及其矿物与有机质的相互作用[J].地球科学进展,1998,13(6):542~546 [18] 梁狄刚,曾宪章,王雪平等.冀中坳陷油气的生成[M].北京:石油工业出版社,2001.1~231 [19] 秦建中.羌塘盆地有机质热演化与成烃史研究[J].石油实验地质,2006,28(4):350~358 -
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