四川盆地侏罗系沙溪庙组天然气地球化学特征及地质意义

doi:10.7623/syxb201905006

石油学报 ›› 2019, Vol. 40 ›› Issue (5): 568-576,586.DOI: 10.7623/syxb201905006

四川盆地侏罗系沙溪庙组天然气地球化学特征及地质意义

肖富森¹, 黄东¹, 张本健², 唐大海³, 冉崎¹, 唐青松⁴, 尹宏²

1. 中国石油西南油气田公司勘探开发研究院四川成都 610041;
2. 中国石油西南油气田公司川西北气矿四川江油 621741;
3. 中国石油西南油气田公司致密油气勘探开发项目部四川成都 610041;
4. 中国石油西南油气田公司川中油气矿四川遂宁 629000

收稿日期:2018-09-03 修回日期:2019-02-21 出版日期:2019-05-25 发布日期:2019-06-03
通讯作者: 黄东,男,1980年12月生,2003年获西南交通大学学士学位,2008年获西南石油大学硕士学位,现为中国石油西南油气田公司勘探开发研究院科技信息室主任、高级工程师,主要从事致密油气研究和管理工作。Email:hdong@petrochina.com.cn
作者简介:肖富森,男,1963年8月生,1984年获西南石油学院学士学位,2007年获成都理工大学博士学位,现为中国石油西南油气田公司企业二级专家、教授级高级工程师,主要从事地质、地震勘探开发综合研究及管理工作。Email:xiaofs10@petrochina.com.cn
基金资助:
国家科技重大专项"四川盆地致密油资源潜力、甜点区预测与关键技术应用"（2016ZX05046-006-008）资助。

Geochemical characteristics and geological significance of natural gas in Jurassic Shaximiao Formation, Sichuan Basin

Xiao Fusen¹, Huang Dong¹, Zhang Benjian², Tang Dahai³, Ran Qi¹, Tang Qingsong⁴, Yin Hong²

1. Exploration and Development Research Institute, PetroChina Southwest Oil & Gas Field Company, Sichuan Chengdu 610041, China;
2. Northwest Sichuan Gasfield, PetroChina Southwest Oil & Gas Field Company, Sichuan Jiangyou 621741, China;
3. Tight Oil and Gas Exploration and Development Project Department, PetroChina Southwest Oil & Gas Field Company, Sichuan Chengdu 610041, China;
4. Central Sichuan Oil & Gas Field, PetroChina Southwest Oil & Gas Field Company, Sichuan Suining 629000, China

Received:2018-09-03 Revised:2019-02-21 Online:2019-05-25 Published:2019-06-03

摘要/Abstract

摘要：

四川盆地侏罗系沙溪庙组天然气具有埋藏浅、成本低、周期短、见效快等优点，受到广泛的重视，是目前低油价下效益开发的重要现实领域之一。通过对侏罗系沙溪庙组天然气组分、天然气碳同位素等地球化学实验数据的分析，揭示了川西地区侏罗系沙溪庙组天然气来自于下伏的须家河组煤系烃源岩，川中北地区沙溪庙组天然气来自于下伏侏罗系湖相烃源岩，川东北地区侏罗系沙溪庙组天然气来自于下伏的须家河组煤系烃源岩和侏罗系湖相烃源岩。结合气源分析结果、构造背景和目前盆地致密气勘探开发程度，明确了侏罗系沙溪庙组浅层致密气向川西北、川中北和川东北地区进行"深化、甩开勘探开发部署"的总体方针，其中川西地区龙门山前缘北段的梓潼凹陷，川中北地区的金华、秋林、公山庙、营山地区以及川东北大巴山前缘的五宝场、渡口河地区具备良好的成藏条件，是下一步浅层致密气的重点勘探地区。

关键词: 勘探方向, 气藏特征, 地球化学特征, 沙溪庙组, 四川盆地

Abstract:

The natural gas in Jurassic Shaximao Formation of Sichuan Basin has the advantages of shallow burial, excellent quality, low development cost, short period and quick response. As an important practical field of efficient development under low oil prices, it has attracted much attention from exploration developers for a long term. Through analyzing the natural gas geochemical experimental data such as natural gas components and natural gas carbon isotopes of the Jurassic Shaximiao Formation, it is revealed that natural gas from the Jurassic Shaximiao Formation in the western Sichuan Basin originates from coal source rocks of the underlying Xujiahe Formation. The natural gas of Shaximiao Formation in the northern part of central Sichuan Basin is sourced from the underlying Jurassic source rocks, and the natural gas of the Jurassic Shaximiao Formation in the northeast of Sichuan Basin is from coal source rocks of the underlying Xujiahe Formation and the Jurassic lake source rocks. In combination with gas source analysis results, structural background as well as the current exploration and development degree of tight gas in the basin, the general policy of "deepening and abandoning exploration and development" is clarified for the Jurassic shallow tight gas from Shaximiao Formation towards the northwestern, north-central and northeastern regions of Sichuan Basin. Of these, in the northern section of the front edge of Longmen Mountain in the western Sichuan Basin, Jinhua, Qiulin, Gongshanmiao and Yingshan in the northern part of central Sichuan Basin as well as the Wubaochang and Duduhe areas on the front edge of Dabashan in the northeastern Sichuan Basin have good accumulation conditions, which is a key exploration area of shallow tight gas.

Key words: exploration direction, gas reservoir characteristics, geochemical characteristics, Shaximiao Formation, Sichuan Basin

中图分类号:

TE122.2

肖富森, 黄东, 张本健, 唐大海, 冉崎, 唐青松, 尹宏. 四川盆地侏罗系沙溪庙组天然气地球化学特征及地质意义[J]. 石油学报, 2019, 40(5): 568-576,586.

Xiao Fusen, Huang Dong, Zhang Benjian, Tang Dahai, Ran Qi, Tang Qingsong, Yin Hong. Geochemical characteristics and geological significance of natural gas in Jurassic Shaximiao Formation, Sichuan Basin[J]. Acta Petrolei Sinica, 2019, 40(5): 568-576,586.

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四川盆地侏罗系沙溪庙组天然气地球化学特征及地质意义

Geochemical characteristics and geological significance of natural gas in Jurassic Shaximiao Formation, Sichuan Basin

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