Sedimentary environment and its controlling on source rocks during late Permian in Sichuan Basin
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摘要: 作为四川盆地最重要的气源岩之一,二叠系烃源岩逐渐被越来越多的研究者所重视。通过对四川盆地晚二叠世龙潭期岩相古地理的恢复,以及沉积环境对烃源岩发育的控制作用分析,指出四川盆地上二叠统优质烃源岩主要发育于浅海陆棚、潮坪-潟湖及滨岸沼泽等相带。文中引入了"有机碳厚度"的概念,即采用有机碳含量与烃源岩厚度之积综合反映烃源岩的发育特征;并结合无机地化与有机碳分析测试数据,论述了沉积环境的源控意义,为烃源岩宏观分布预测与资源量估算提供了理论参考。Abstract: As the most important source rock for gas generation in the Sichuan Basin, Permian source rocks have attracted more and more attentions. The lithofacies palaeogeography during the Longtan phase of the Late Permian in the Sichuan Basin was reconstructed, and the controlling effects of sedimentary environment on source rock generation were analyzed. In the Upper Permian of the Sichuan Basin, favorable source rocks mainly developed in the shallow shelf, tidal flat-lagoon and onshore swamp facies. The concept of "organic carbon thickness" was introduced in this article. Organic carbon content was multiplied by source rock thickness so as to illustrate the generation features of source rocks. Combined with inorganic geochemical characteristics and organic carbon analyses, the controlling effects of sedimentary environment on source rock generation were studied, providing theoretical reference for the macroscopic distribution prediction of source rocks and resource estimation.
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Key words:
- hydrocarbon source rock /
- sedimentary environment /
- controlling factor /
- Permian /
- Sichuan Basin
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[1] 马永生,蔡勋育.四川盆地川东北区二叠系-三叠系天然气勘探成果与前景展望[J].石油与天然气地质,2006,27(6):741-750. [2] 郭彤楼.川东北地区台地边缘礁、滩气藏沉积与储层特征[J].地学前缘,2011,18(4):201-211. [3] 魏国齐,刘德来,张林,等.四川盆地天然气分布规律与有利勘探领域[J].天然气地球科学,2005,16(4):437-442. [4] 刘光祥,陶静源,潘文蕾,等.川东北及川东区天然气成因类型探讨[J].石油实验地质,2002,24(6):512-516. [5] 朱扬明,顾圣啸,李颖,.等四川盆地龙潭组高热演化烃源岩有机质生源及沉积环境探讨[J].地球化学,2012,41(1):35-44. [6] 腾格尔,秦建中,付小东,等.川东北地区上二叠统吴家坪组烃源岩评价[J].古地理学报,2010,12(3):334-345. [7] 付小东,秦建中,腾格尔,等.四川盆地北缘上二叠统大隆组烃源岩评价[J].石油实验地质,2010,32(6):566-571. [8] 郭正吾.四川盆地形成演化[M].北京:地质出版社,1994. [9] 四川省地质矿产局.四川省区域地质志[M].北京:地质出版社,1991. [10] 腾格尔,刘文汇,徐永昌,等.海相地层无机参数与烃源岩发育环境的相关研究:以鄂尔多斯盆地为例[J].石油与天然气地质,2005,26(4):411-421. [11] 梁狄刚,张水昌,张宝民,等.从塔里木盆地看中国海相生油问题[J].地学前缘,2000,7(4):534-547. [12] 陈践发,张水昌,鲍志东,等.海相优质烃源岩发育的主要影响因素[J].海相油气地质,2006,11(3):49-54. [13] 赵文智,王兆云.高效气源灶及其对形成高效气藏的作用[J].沉积学报,2005,23(4):709-718. [14] 秦建中,腾格尔,付小东,等.海相优质烃源层评价与形成条件研究[J].石油实验地质,2009,31(4):366-372. [15] Hunt J M.Petroleum geochemistry and geology[M].New York:Freeman,1979:62-273. [16] Demaison G J,Moor G T.Anoxic envieronments and oil source bed genesis[J].AAPG Bulletin,1980,64(8):1179-1209. [17] 李荣西.有机质热演化与极低级变质作用[J].地质科技情报,1996,15(3):64-66. [18] 赵一阳,鄢明才.中国浅海沉积物地球化学[M].北京:科学出版社,1994. [19] 王中波,杨守业,李从先,等.南黄海中部沉积物岩心常量元素组成与古环境[J].地球化学,2004,33(5):483-490. [20] 张长江,刘光祥,曾华盛,等.川西地区二叠系烃源岩发育环境及控制因素[J].天然气地球科学,2012,23(4):626-633. [21] 腾格尔,刘文汇,徐永昌,等.缺氧环境及地球化学判识标志的探讨:以鄂尔多斯盆地为例[J].沉积学报,2004,22(2):365-372. [22] 吴智勇.化学地层学及其研究进展[J].地层学杂志,1999,23(3):234-240. [23] 李荣西,魏家庸,肖家飞,等.海进体系域碳氧同位素地球化学响应:以黔西南地区三叠系为例[J].地球科学与环境学报,2007,29(1):1-5.
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