合肥盆地烃源岩有机质热演化历史分析
|
摘要
利用镜质体反射率资料及其定量恢复的合肥盆地的古地温结合伊利石结晶度测定系统研究了盆地石炭—二叠系以来的热演化史,在此基础上分析了石炭—二叠系、下侏罗系、中上侏罗系、白垩系、古近系的烃源岩有机质的热演化程度及热演化史,结果表明合肥盆地C—P系呈现为高成熟阶段,并在下侏罗统沉积之后开始进入生油门限,在上侏罗统沉积后地温曾达245℃,而在白垩纪中期(朱巷组沉积后)最大古地温度达到过305℃指示进入了过成熟阶段。下侏罗统防虎山组Ro值和伊利石结晶度也显示了较高的热演化程度,在中侏罗统沉积后开始进入生油门限,在早白垩世朱巷组沉积后达到了最高的热演化程度,最大古地温达260℃。中—上侏罗统随着下白垩统朱巷组的沉积而进入生油门限,在下白垩统沉积之后达到了最大的古地温度,分别为225℃、230℃,指示开始进入过成熟阶段,朱巷组最大埋藏温度出现在早白垩世末,达到了110～120℃,指示进入了成熟期。在上覆古近系沉积后曾达到最大古地温(110～160℃),显示进入了成熟阶段。古近系定远组未进入成熟阶段,最大古地温出现在定远组沉积之后,但小于50℃。
Based on vitrinite reflectivity analysis,paleogeotemperature inversion and X ray diffraction series of the smallest granule illite crystallinity,this paper has analyzed thermal evolution of source rock since Carboniferous-Permian.The result indicates that 1:Carboniferous-Permian source rock was in high maturity,entered threshold of oil generation after the lower Jurassic deposition.After the upper Jurassic,paleogeotemperature was up to 245℃.2:Fanghushan Formation of the lower Jurassic was also in higher maturity,entered threshold of oil generation after the middle Jurassic,maximal paleogeotemperature up to 260℃ after the middle Cretaceous.3:Middle-upper Jurassic enter threshold of oil generation at lower Cretaceous.Its maximal paleogeotemperature up to 225℃ and 230℃ after Zhuxiang Formation.4:Maximal paleogeotemperature of Zhuxiang Formation up to 110-120℃ at the end of the early Cretaceous 5:.Dingyuan Formation of paleogene is immature,maximal paleogeotemperature less than 50℃ after Dingyuan Formation deposition.
Based on vitrinite reflectivity analysis,paleogeotemperature inversion and X ray diffraction series of the smallest granule illite crystallinity,this paper has analyzed thermal evolution of source rock since Carboniferous-Permian.The result indicates that 1:Carboniferous-Permian source rock was in high maturity,entered threshold of oil generation after the lower Jurassic deposition.After the upper Jurassic,paleogeotemperature was up to 245℃.2:Fanghushan Formation of the lower Jurassic was also in higher maturity,entered threshold of oil generation after the middle Jurassic,maximal paleogeotemperature up to 260℃ after the middle Cretaceous.3:Middle-upper Jurassic enter threshold of oil generation at lower Cretaceous.Its maximal paleogeotemperature up to 225℃ and 230℃ after Zhuxiang Formation.4:Maximal paleogeotemperature of Zhuxiang Formation up to 110-120℃ at the end of the early Cretaceous 5:.Dingyuan Formation of paleogene is immature,maximal paleogeotemperature less than 50℃ after Dingyuan Formation deposition.
引文
1陈刚,赵重远,李丕龙,等.合肥盆地构造热演化的裂变径迹证据[J].地球物理学报,2005,(48)6:1366-1371[Chen Gang,Zhao Zhongyuan,Li Pilong,et al.Fission track evidence for the tectonic-thermal history of the Hefei Basin[J].Chinese Journal of Geophysics,2005,(48)6:1366-1371]
2陈刚,赵重远,李丕龙,等.合肥盆地热演化特征[J].石油与天然气地质,2004,25(6):854-863[Chen Gang,Zhao Zhongyuan,Li Pilong,Ren Zhanli,Li Xiangping,Li Zongliang.Analysis of character-istics of thermal evolution in Hefei Basin[J].Oil&Gas Geology,2004,(6):854-863]
3薛爱民,杨小毛.利用磷灰石裂变径变迹资料反演合肥盆地古地温和估计沉降率与剥蚀量[J].地球物理学报,1994,(37)6:787-794[Xue Ai-min,Yang Xiaomao.Inversion of thermal history and evo-lution of subsidence and erosion rates using apatite fission track data in Hefei Basin[J].Chinese Journal of Geophysics,1994,37(6):787-794]
4刘国生,朱光,王道轩,等.合肥盆地东部朱巷组X射线衍射分析及其油气意义[J].合肥工业大学学报(自然科学版),2003,(26)1:31?36[Liu Guosheng,Zhu Guang,Wang Daoxuan,et al.Analy-sis of the Zhuxiang Formation in the eastern part of Hefei Basin by XRD and significance of the results in the light of oil and gas[J].Journal of Hefei University of Technology(Natural Science),2003,(26)1:31-36]
5赵宗举,朱琰.合肥盆地构造演化及油气系统分析[J].石油勘探与开发,2001,28(4):8-13[Zhao Zongju,Zhu Yan.The structure evolution and the petroleum system in Hefei Basin[J].Petroleum Ex-ploration and Development,2001,28(4):8-13]
6朱光,徐嘉炜,Fletcher C J N,Fitches W R.应用X射线衍射分析胶北蓬莱群板岩中的变质作用[J].地质与勘探,1994,30(2):42-49[Zhu Guang,Xu Jiawei,Fletcher C J N,Fitches W R.Analy-sing slate metamorphism of Penglai group in North Shandong by X ray diffraction[J].Geology and Prospecting,1994,30(2):42-49]
7朱光.用伊利石结晶度确定碎屑沉积岩甚低级变质等级[J].石油勘探与开发,1995,22(1):33-35[Zhu Guang.Grading the extreme-low metamorphic clastic sedimentary rocks by the crystallinity of the il-lite[J].PetroleumExploration and Development,1995,22(1):33-35]
8K bler B.La cristallinite de l`illite et les zones tout a fait superieures du metamorphism[C]∥Etages Tectoniques.Colloque de Neuchatel,1967:105-122
9邱楠生,蔡进功,李善鹏,等.昌潍坳陷潍北凹陷热历史和油气成藏期次[J].地质科学,2003,38(3):332-341[Qiu Nansheng,Cai Jingong,Li Shanpeng,et al.Thermal evolution and hydrocarbon En-trapment in the Weibei Sag,Changwei depression[J].Scientia Geolog-ica Sinica,2003,38(3):332-341]
10邱楠生,杨海波,王绪龙.准噶尔盆地构造-热演化特征[J].地质科学,2002,37(4):423-429[Qiu Nansheng,Yang Haibo,Wang Xulong.Tectono-thermal evolution in Junggar Basin[J].Scientia Geologica Sinica,2002,37(4):423-429]
11邱楠生,冯石,廖兴明,等.辽河盆地东部凹陷构造-热演化研究[J].石油学报,1998,19(2):32-35[Qiu Nansheng,Feng Shi,Li-ao Xingming.Analysis on the thermal history of eastern depression in Liaohe Basin[J].Acta Petrolei Sinica,1998,19(2):32-35]
12邱楠生,金之钧,王飞宇.多期构造演化盆地的复杂地温场对油气生成的影响—以塔里木盆地塔中地区为例[J].沉积学报,1997,15(2):142-144[Qiu Nansheng,Jin Zhijun,Wang Feiyu.The effect of complex geothermal field on the multi-structure evolution to hydrocarbon generation a case of Tazhong area in Tarim Basin[J].Acta Sedimentologica Sinica,1997,15(2):142-144]
13Sweeney J J,Burnham A K.Evaluation of a simple model of vitrinite reflectance based on chemical kinetics[J].AAPG Bulletin,1990,1559-1571
2陈刚,赵重远,李丕龙,等.合肥盆地热演化特征[J].石油与天然气地质,2004,25(6):854-863[Chen Gang,Zhao Zhongyuan,Li Pilong,Ren Zhanli,Li Xiangping,Li Zongliang.Analysis of character-istics of thermal evolution in Hefei Basin[J].Oil&Gas Geology,2004,(6):854-863]
3薛爱民,杨小毛.利用磷灰石裂变径变迹资料反演合肥盆地古地温和估计沉降率与剥蚀量[J].地球物理学报,1994,(37)6:787-794[Xue Ai-min,Yang Xiaomao.Inversion of thermal history and evo-lution of subsidence and erosion rates using apatite fission track data in Hefei Basin[J].Chinese Journal of Geophysics,1994,37(6):787-794]
4刘国生,朱光,王道轩,等.合肥盆地东部朱巷组X射线衍射分析及其油气意义[J].合肥工业大学学报(自然科学版),2003,(26)1:31?36[Liu Guosheng,Zhu Guang,Wang Daoxuan,et al.Analy-sis of the Zhuxiang Formation in the eastern part of Hefei Basin by XRD and significance of the results in the light of oil and gas[J].Journal of Hefei University of Technology(Natural Science),2003,(26)1:31-36]
5赵宗举,朱琰.合肥盆地构造演化及油气系统分析[J].石油勘探与开发,2001,28(4):8-13[Zhao Zongju,Zhu Yan.The structure evolution and the petroleum system in Hefei Basin[J].Petroleum Ex-ploration and Development,2001,28(4):8-13]
6朱光,徐嘉炜,Fletcher C J N,Fitches W R.应用X射线衍射分析胶北蓬莱群板岩中的变质作用[J].地质与勘探,1994,30(2):42-49[Zhu Guang,Xu Jiawei,Fletcher C J N,Fitches W R.Analy-sing slate metamorphism of Penglai group in North Shandong by X ray diffraction[J].Geology and Prospecting,1994,30(2):42-49]
7朱光.用伊利石结晶度确定碎屑沉积岩甚低级变质等级[J].石油勘探与开发,1995,22(1):33-35[Zhu Guang.Grading the extreme-low metamorphic clastic sedimentary rocks by the crystallinity of the il-lite[J].PetroleumExploration and Development,1995,22(1):33-35]
8K bler B.La cristallinite de l`illite et les zones tout a fait superieures du metamorphism[C]∥Etages Tectoniques.Colloque de Neuchatel,1967:105-122
9邱楠生,蔡进功,李善鹏,等.昌潍坳陷潍北凹陷热历史和油气成藏期次[J].地质科学,2003,38(3):332-341[Qiu Nansheng,Cai Jingong,Li Shanpeng,et al.Thermal evolution and hydrocarbon En-trapment in the Weibei Sag,Changwei depression[J].Scientia Geolog-ica Sinica,2003,38(3):332-341]
10邱楠生,杨海波,王绪龙.准噶尔盆地构造-热演化特征[J].地质科学,2002,37(4):423-429[Qiu Nansheng,Yang Haibo,Wang Xulong.Tectono-thermal evolution in Junggar Basin[J].Scientia Geologica Sinica,2002,37(4):423-429]
11邱楠生,冯石,廖兴明,等.辽河盆地东部凹陷构造-热演化研究[J].石油学报,1998,19(2):32-35[Qiu Nansheng,Feng Shi,Li-ao Xingming.Analysis on the thermal history of eastern depression in Liaohe Basin[J].Acta Petrolei Sinica,1998,19(2):32-35]
12邱楠生,金之钧,王飞宇.多期构造演化盆地的复杂地温场对油气生成的影响—以塔里木盆地塔中地区为例[J].沉积学报,1997,15(2):142-144[Qiu Nansheng,Jin Zhijun,Wang Feiyu.The effect of complex geothermal field on the multi-structure evolution to hydrocarbon generation a case of Tazhong area in Tarim Basin[J].Acta Sedimentologica Sinica,1997,15(2):142-144]
13Sweeney J J,Burnham A K.Evaluation of a simple model of vitrinite reflectance based on chemical kinetics[J].AAPG Bulletin,1990,1559-1571
目录