川东北地区三叠-侏罗系陆相烃源岩评价及油源对比

北京大学学报（自然科学版）

川东北地区三叠-侏罗系陆相烃源岩评价及油源对比

张巍^1,2,关平¹,韩定坤³,孟仟祥⁴,谢小琴¹,简星¹,刘若冰³

1. 造山带与地壳演化教育部重点实验室, 北京大学地球与空间科学学院, 北京 100871; 2. 中国石油天然气股份有限公司勘探开发研究院, 北京 100083; 3. 中国石油化工股份有限公司勘探南方分公司勘探开发研究院, 成都 610041; 4. 中国科学院地质与地球物理研究所气体地球化学重点实验室, 兰州 730000;

收稿日期:2012-08-18 出版日期:2013-09-20 发布日期:2013-09-20

Evaluation of Terrestrial Hydrocarbon Source Rocks and Oil Source Correlation in Triassic and Jurassic in Northeastern Sichuan

ZHANG Wei^1,2, GUAN Ping¹, HAN Dingkun³, MENG Qianxiang⁴, XIE Xiaoqin¹, JIAN Xing¹, LIU Ruobing³

1. The Key Laboratory of Orogenic Belts and Crustal Evolution MOE, School of Earth and Space Sciences, Peking University, Beijing 100871; 2. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083; 3. Research Institute of Exploration and Development, South Branch Office of Exploration, China Petrochemical Corporation, Chengdu 610041; 4. Key Laboratory of Gas Geochemistry, Chinese Academy of Sciences, Lanzhou 730000;

Received:2012-08-18 Online:2013-09-20 Published:2013-09-20

摘要/Abstract

摘要： 通过系统的有机地球化学分析, 对川东北陆相地层主力烃源岩进行了系统评价, 对油、源进行了精细对比, 查明了非常规油气的成藏特征。分析认为陆相地层须家河组、自流井组和千佛崖组发育大量有效烃源岩甚至优质烃源岩, 有机质丰度较高, 各地区各层系TOC平均值介于0.41%~2.99%之间, 有机质类型主要为Ⅱ, Ⅲ型, 处于成熟?过成熟阶段(Ro介于 1.3%~2.0%之间), 具有良好的生烃潜力, 可成为该区中、下侏罗统非常规油气的主力烃源岩。经油源对比及成藏特征分析, 发现中、下侏罗统陆相非常规油气来源于陆相烃源岩, 未显示海相油气来源, 说明由于陆相储层异常致密, 导致油气运移困难而源内或近源成藏。其中, 元坝?阆中地区千佛崖组的油气来自于自流井组烃源岩, 自流井组的油气来自于自流井组及须家河组两套烃源岩。宣汉?达县地区的油气来自于须家河组烃源岩。下侏罗统泥页岩具备页岩气形成的条件, 中、下侏罗统致密砂岩具备致密砂岩油形成的条件。

关键词: 川东北, 三叠?侏罗系, 烃源岩, 油源对比, 非常规油气

Abstract: Through systematic organic geochemistry analysis, the main hydrocarbon source rocks of terrestrial formation in northeastern Sichuan are systematically evaluated, sources of oil are determined by carefully comparison of geochemical characteristics between source rocks and oil, and accumulation characteristics are identified. Analysis results indicate that terrestrial formations, such as Group Xujiahe, Ziliujing and Qianfoya, develop vast effective, even rich source rocks with high organic matter abundance, and the average TOC values of different districts and groups range from 0.41% to 2.99%. Type Ⅱ and type Ⅲ are widely distributed, and source rocks are high mature to over mature with Ro ranging from 1.3% to 2.0%. Generally, hydrocarbon source rock of terrestrial formation in northeastern Sichuan has high hydrocarbon generation potential, which could be favorable main source rocks of middle and lower Jurassic terrestrial unconventional oil and gas in research area. Comparison of geochemical characteristics between source rocks and oil and accumulation characteristics analysis demonstrate that middle and lower Jurassic terrestrial unconventi onal oil and gas are generated from terrestrial sources with few marine sources, which proves that oil and gas migration difficulty caused by the extremely tight terrestrial reservoirs leads to in-source or near-source accumulation. Oil and gas in group Qianfoya are from Ziliujing source rocks and that in group Ziliujing are from both Ziliujing and Xujiahe source rocks in Yuanba-langzhong. Oil and gas are all from Xujiahe source rocks in Xuanhan-daxian. Lower Jurassic shale can fill the requirements for shale gas, while middle and lower Jurassic tight sandstone can fill the requirements for tight sandstone oil.

Key words: northeastern Sichuan, Triassic and Jurassic, hydrocarbon source rock, oil source correlation, unconventional oil and gas

中图分类号:

P618

张巍,关平,韩定坤,孟仟祥,谢小琴,简星,刘若冰. 川东北地区三叠-侏罗系陆相烃源岩评价及油源对比[J]. 北京大学学报（自然科学版）.

ZHANG Wei,GUAN Ping,HAN Dingkun,MENG Qianxiang,XIE Xiaoqin,JIAN Xing,LIU Ruobing. Evaluation of Terrestrial Hydrocarbon Source Rocks and Oil Source Correlation in Triassic and Jurassic in Northeastern Sichuan[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

导出引用管理器 EndNote|Ris|BibTeX

链接本文: https://xbna.pku.edu.cn/CN/

https://xbna.pku.edu.cn/CN/Y2013/V49/I5/826

[1]	张驰, 关平, 张济华, 梁晓伟, 丁晓楠, 尤源. 分形理论表征非常规油气储层孔隙结构特征研究进展[J]. 北京大学学报自然科学版, 2023, 59(5): 897-908.
[2]	周宾, 关平, 魏恒飞, 张永庶, 付玲, 于川淇. 柴达木盆地扎哈泉地区致密油新类型的发现及其特征[J]. 北京大学学报自然科学版, 2017, 53(1): 37-49.
[3]	谢其锋,周立发,马国福,谭修中,万延周,梁士伟,张凯,赵俊辉. 南祁连盆地三叠系烃源岩有机地球化学特征[J]. 北京大学学报（自然科学版）, 2011, 47(6): 1034-1040.
[4]	张家震,徐备,庞绪勇,卫巍,王宇. 新疆富蕴县沙尔布拉克地区南明水组烃源岩有机地球化学特征[J]. 北京大学学报（自然科学版）, 2010, 46(2): 231-236.
[5]	张婷婷,刘波,秦善. 川东北二叠系-三叠系白云岩成因研究[J]. 北京大学学报（自然科学版）, 2008, 44(5): 799-809.
[6]	赵泽辉, 郭召杰, 张臣, 陆洁民. 新疆东部三塘湖盆地构造演化及其石油地质意义[J]. 北京大学学报（自然科学版）, 2003, 39(2): 219-228.