渡口河构造珍珠冲段浅层天然气成藏条件分析
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摘要
渡3井和渡浅1井在侏罗系下统自流井组珍珠冲段(J1z)钻获天然气,为了开辟川东北地区陆相碎屑岩油气勘探的新领域,文章对渡口河构造的特点、珍珠冲段的成藏地质条件进行了分析和探讨,认为渡口河构造珍珠冲段天然气主要来自下伏陆相生烃岩系,分流河道微相具有良好的储集性能,录井、测井、地震资料均表明珍珠冲段砂岩储层发育,纵向上分布较稳定,横向上有一定分布范围;具有较好的封盖条件;提出渡口河构造珍珠冲段浅层气勘探应遵循“兼探为主,专探为辅”的建议。
Natural gas was found out in Zhenzhuchong member, Ziliujing Formation, Lower Jurassic, in wells Du-3 and Duqian-1. In order to open up the new oil and gas exploration target of continental clastic rocks in Northeast Sichuan, through analyzing and investigating the reservoiring geological conditions and characteristics of Zhenzhuchong member in Dukouhe structure, it is pointed out in the paper that the natural gas in Zhenzhuchong member in Dukouhe structure mainly came from underlying continental source rocks and the distributary channel microfacies is of good petrophysical property; and the geological logging, well logging and seismic data indicate that the sandstone reservoirs are developed in Zhenzhuchong member, they having a stable vertical distribution and good sealing condition, and occupying a certain lateral area. Finally, it is suggested that the shallow gas exploration of Zhenzhuchong member in Dukouhe structure should follow the principle of “relying mainly on simultaneous exploration while making special exploration subsidiary”.
Natural gas was found out in Zhenzhuchong member, Ziliujing Formation, Lower Jurassic, in wells Du-3 and Duqian-1. In order to open up the new oil and gas exploration target of continental clastic rocks in Northeast Sichuan, through analyzing and investigating the reservoiring geological conditions and characteristics of Zhenzhuchong member in Dukouhe structure, it is pointed out in the paper that the natural gas in Zhenzhuchong member in Dukouhe structure mainly came from underlying continental source rocks and the distributary channel microfacies is of good petrophysical property; and the geological logging, well logging and seismic data indicate that the sandstone reservoirs are developed in Zhenzhuchong member, they having a stable vertical distribution and good sealing condition, and occupying a certain lateral area. Finally, it is suggested that the shallow gas exploration of Zhenzhuchong member in Dukouhe structure should follow the principle of “relying mainly on simultaneous exploration while making special exploration subsidiary”.
引文
周文、江兴福等,四川盆地川东北部地区上三叠统及侏罗系勘探潜力,研究报告,2000。
蒋骥、刘鸿,川东渡口河潜伏构造地震老资料重新处理解释,研究报告,1997。
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2 罗啸泉,曹烈等.川西坳陷上三叠统油气运移特征.天然气工业,2004;(8):4～7
3 蔡开平,廖仕孟.川西地区侏罗系气藏气源研究.天然气工业,2000;(1):36～40
4 谢继容,唐大海.川中公山庙沙一段油藏成藏条件.天然气工业,2000;(增刊):23～26
5 蔡开平,李梅.川西南部地区沙溪庙组勘探目标研究.天然气工业,2004;(10):1～5
6 杨开珍,陈伟明等.川西坳陷中南段浅层气的地震响应特征.天然气工业,2000;(5):39～41
蒋骥、刘鸿,川东渡口河潜伏构造地震老资料重新处理解释,研究报告,1997。
1 杨天泉,黄先平等.川东渡口河气田飞仙关气藏地质特征与勘探前景.天然气工业,1999;(6):11～13
2 罗啸泉,曹烈等.川西坳陷上三叠统油气运移特征.天然气工业,2004;(8):4～7
3 蔡开平,廖仕孟.川西地区侏罗系气藏气源研究.天然气工业,2000;(1):36～40
4 谢继容,唐大海.川中公山庙沙一段油藏成藏条件.天然气工业,2000;(增刊):23～26
5 蔡开平,李梅.川西南部地区沙溪庙组勘探目标研究.天然气工业,2004;(10):1～5
6 杨开珍,陈伟明等.川西坳陷中南段浅层气的地震响应特征.天然气工业,2000;(5):39～41
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