Burial and thermal histories of northeastern Sichuan Basin：A case study of well Puguang 2
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摘要: 基于前人研究资料,运用热成熟度指数法(TTI),以普光2井为例,恢复了川东北地区地热史和地层埋藏史,探讨了研究区烃源岩的热演化和生排烃过程。研究认为:各烃源层的成熟度演化主要定型于白垩纪末期,下寒武统烃源岩生烃期局限在晚二叠世—晚三叠世;上奥陶统至下志留统烃源岩的快速生烃期为中三叠世—晚三叠世和中侏罗世;二叠系烃源岩的快速生烃期为晚三叠世和中侏罗世。另外,各烃源岩都经历了至少2次生烃高峰期,包括成熟期的生油(液态烃)高峰期及高成熟期的尚未排除的残留液态烃进一步裂解生气高峰期。Abstract: The thermal maturity index (TTI) was applied in well Puguang 2 to recover the burial and thermal histories of the northeastern Sichuan Basin. In this way, the thermal evolution of source rocks and the hydrocarbon generation and migration processes in the study area were discussed. The maturity of source rocks evolved until the end of Cretaceous. Source rocks in the Lower Cambrian gave birth to hydrocarbon only from the Late Permian to the Late Triassic. Source rocks from the Upper Ordovician to the Lower Silurian gave birth to hydrocarbon rapidly from the Middle Triassic to the Late Triassic and also during the Middle Jurassic. Source rocks in Permian gave birth to hydrocarbon rapidly during the Late Triassic and the Middle Jurassic. All the above-mentioned source rocks experienced at least 2 hydrocarbon generation peaks, including the oil (liquid hydrocarbon) generation during the mature stage and the cracking of liquid hydrocarbon to gas during the high-mature stage.
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[1] 郭正吾,邓康龄,韩永辉,等.四川盆地形成与演化[M].北京:地质出版社,1996:48-88. [2] 龙胜祥,曾涛,李检龙.川东北二叠、三叠系天然气勘探方向[J].石油与天然气地质,1996,17(2):134-139. [3] 姚雪根.四川盆地天然气成藏条件及其勘探方向[J].海上油气地质,2002,7(1):13-28. [4] 邱楠生,胡圣标,何丽娟.沉积盆地热体制研究的理论与应用[M].北京:石油工业出版社,2004:38-56. [5] 卢庆治,郭彤楼,胡圣标.川东北地区热流史及成烃史研究[J].新疆石油地质,2006,27(5):549-551. [6] Sweeney J J,Burnham A K.Evaluation of simple model of vitrinite reflectance based on chemical kinetics[J].AAPG Bulletin,1990,74(10):1559-1570. [7] 胡圣标.沉积盆地地热体制的研究方法原理和进展[J].地学前缘,1995,2(4):171-179. [8] 胡圣标,张容燕,周礼成.沉积盆地热史恢复方法[J].勘探家,1998,3(4):52-54. [9] 胡圣标.中国大陆地区大地热流数据汇编(第三版)[J].地球物理学报,2001,44(5):611-626. [10] 卢庆治,胡圣标,郭彤楼,等.川东北地区异常高压形成的地温场背景[J].地球物理学报,2005,48(5):1110-1116. [11] 赵志东,王炯章,李载沃,等.中国石油地质志第十一卷:滇黔桂油气区[M].北京:石油工业出版社,1987:81-116. [12] 沈传波,梅廉夫,郭彤楼,等.川东北地区中、新生代热历史的裂变径迹分析[J].天然气工业,2007,27(7):24-26. [13] 韩永辉,吴春生.四川盆地地温梯度及几个深井的热流值[J].石油与天然气地质,1993,14(1):80-84. -
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